work makAll play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All HBAM2016AUG95HPro 5.0 All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a goodCopyright 1984-1997 Claris Corporation and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. All play and no work makes John a good boy. cbundtzen@contains@dome@]forms@granite@1light-colored@Xmassive@|pillow@shew@stained@various@f@locally@6sandstone@Fundivided@aM€@&€@NNNNN€4@Y€k@€@€@NNN@Y€k@€@€@NNNN€4@Y€k@€@€@NNNNNN@€@€@€CNNBFACGADCEHBFDGIBHDIJBJDKLALOAMCNQAORAPCQSARTASCTVEUXAVYAWZAX[BY]AZ^E[_B\`A]aA^bA_cB`dBae @0 ANAME@SPAT@AA9QHBAM3016AUG95@'Ã!Ã!`Ã!pÃ! Ã"` Ã" Ã#Ã$Ã$`Ã$Ã$Ã*ÃAÃB !ÃQ "ÃVÃaÃfÃg`ÃiÃi Ãu ÃvÃwÃÃÃà Ã0Ä!b#Ä"bÄ#a$Ä$)Ä$1,Ä(Ä*(Ä*fÄ2AÄ2aÄ2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dd2dddd2dddd2ddd2dd2dd2hÄ3!pÄ3AqÄ3fiÄ3gjÄ3qkÄ3rlÄ3mÄ41nÄ4AoÄ5vÄ5!wÄ5"xÄ51~Ä5QÄ5VÄ5arÄ5qsÄ5vtÄ5uÄ5yÄ6!Ä61zÄ66{Ä6A|Ä6Q}Ä6Ä7Ä7Ä7Ä8Ä8Ä81Ä9! Ä9# Ä9&Ä9'Ä9(Ä92Ä9a Ä9b Ä9c Ä9qÄ9kÄ:Ä:1%Ä:V&WW/@AGE DESCRIPTIONLABELNAMEDAnsaclassB GA description@@?A Layout #1A Layout #1B$$$$ @BBB@ A  BUUX $,.YesNo/,  , : AM PM@Arial MS Sans Serif !jX5{iD  jD{wHEkD {0SunMonTueWedThuFriSatJanFebMarAprMayJunJulAugSepOctNovDecAE1m:v_A xM 9/22/2005 E Pro 3.0 - 4.0F!$$2(H Pro 5.0 - 5.5M1,,./: AM PM AMYyTtNnFfNALL ODBF P^SundayMondayTuesday WednesdayThursdayFridaySaturdayJanuaryFebruaryMarchAprilMayJuneJulyAugust SeptemberOctoberNovemberDecemberQ1Q2Q3Q4 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter,  , NSACLASSSOURCESDAnsaclassB GA descriptionB GAlabelB GAageB GAnameB GAsourcesB G $,.YesNo/,  , : AM PM@Arial MS Sans Serif ! `@@@ A Layout #1A Layout #1B$$$$@A $,.YesNo/,  , : AM PMB  C $,.YesNo/,  , : AM PMD  E $,.YesNo/,  , : AM PMF  G $,.YesNo/,  , : AM PMH  I $,.YesNo/,  , : AM PMSBnsaclassDlabelFnameHageJ descriptionL Reference A AUUnits from source mapsV Key file data @BBA   B *           ifferent units mapped in various areas throughout the map area: In the Healy quadrangle, unit Ts (Csejtey and others, 1992) consists of a sequence of poorly consolidated fluviatile dark-gray shale, yellowish-gray sandstone, siltstone, and pebble conglomerate of possible Eocene to Miocene age that may be in part correlative with the Tertiary coal-bearing sequence (unit Tcb). In the Mount Hayes quadrangle, units Ts and Tsc of (Nokleberg and others, 1992a), consist J  K $,.YesNo/,  , : AM PML  MN $,.YesNo/,  , : AM PMO $,.YesNo/,  , : AM PMP $,.YesNo/,  , : AM PMQR $,.YesNo/,  , : AM PMR@Ã!Ã!`Ã!pÃ! Ã"` Ã" Ã#Ã$Ã$`Ã$Ã$Ã*ÃAÃB !ÃQ "ÃVÃaÃfÃg`ÃiÃi Ãu ÃvÃwÃÃÃà Ã0Ä!b#Ä"bÄ#a$Ä$)Ä$1,Ä(Ä*(Ä*fÄ2AÄ2aÄ2dÄ2hÄA!ÄA#ÄA$ÄA%ÄA'ÄA1ÄBÄCa4ÄG!-ÄQ1ÄRaÄSA%ÄSQÄSa ÄT! ÄhA Äi!& @[Ä*RÄ*PÄ*SÄ*VÄ1!QÄ11TÄ1AWÄ2bÄ2\Ä2`Ä2!cÄ2&_Ä2(^Ä26aÄ2c]Ä2XÄ2YÄ2dÄ2Ä2fÄ2eÄ2gÄ2hÄ3!pÄ3AqÄ3fiÄ3gjÄ3qkÄ3rlÄ3mÄ41nÄ4AoÄ5vÄ5!wÄ5"xÄ51~Ä5QÄ5VÄ5arÄ5qsÄ5vtÄ5uÄ5yÄ6!Ä61zÄ66{Ä6A|Ä6Q}Ä6Ä7Ä7Ä7Ä8Ä8Ä81Ä9! Ä9# Ä9&Ä9'Ä9(Ä92Ä9a Ä9b Ä9c Ä9qÄ9kÄA!ÄAAÄB!3A450BAndesite and basalt lava flows, sills, and plugs. These primarily extrusive rocks typically cap ridges and include massive lava flows, agglomerate, and lahar depositsCQTvDQuaternary and Pliocene?EVolcanic rocksadrangle (Nokleberg and others, in press), but also includes the northernmost of the Cook Inlet volcanoes in the Tyonek quadrangle (Miller and Smith, 1976; Magoon and others, 1976) CQvD QuaternaryEVolcanic rocks, undividedFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A450BAndesite and basalt lava flows, sills, and plugs. These primarily extrusive rocks typically cap ridges and include massive lava flows, agglomerate, and lahar depositsCQTvDQuaternary and Pliocene?EVolcanic rocks=i€FWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.€A550AConsists of 1,500 m of interbedded sandstone and siltstone characterized by randomly distributed pebbles and cobbles. Includes randomly distributed pebbles and cobbles of glacial-marine origin (Allison, 1978). A single 1-m-thick cobble conglomerate bed reported 350 m above base of unit. The unit is richly fossiliferous, containing marine fossils of Pliocene age. Allison (1978, p. 177) reports the occurrence of a diverse fauna, consisting of more than 80 species that are "* * * largely B+composed of living, cold-water, North Pacific and Arctic taxa" and indicate cold-water conditions, colder than the present Gulf of Alaska. Based on the available fauna, Allison (1978) suggests that deposition occurred in the upper part of the outer neritic zone in water depths between 91 and 145 me D:udes the Wrangell Lava consisting chiefly of basalt and andesite in the southeastern part of the map area and olivine basalt and vesicular andesite in the northern part of the map area (Nokleberg and others, in press) -FWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000. A640BFresh-water sandstone, shale, and conglomerate, locally containing coly seams. Generally steeply dipping and well indurated; locally highly contorted. (Includes Sitkinak and Sitkalidak Formations). Unit not used on this map.CTcbDTertiaryEMFresh-water sandstone, shale, and conglomerate, locally containing coly seamsFkCapps, S.R., 1937, Kodiak and adjacent islands, Alaska: U.S. Geological Survey Bulletin 880-C, p. 111-184.)A1300;A100BUnconsolidated, poorly to well-sorted, poorly to moderately well-stratified deposits; consists predominantly of alluvial, colluvial, glacial, marine, lacustrine, eolian, and swamp depositsCQsD QuaternaryESurficial deposits, undiividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A300consists predominantly of alluvial, colluvial, glacial, marine, lacustrine, eolian, and swamp depositsCQsD QuaternaryESurficial deposits, undiividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A300ock fragments to fine sand and silt;CQsD QuaternaryE$Surficial deposits, undifferentiatedA300SB of (unit Ts) brown sandstone and graywacke and interbedded conglomerate and argillite of possible Oligocene to Pliocene age and (unit Tsc) light-colored, fine-grained, poorly sorted sandstone, of Eocene to Miocene age, locally containing interbedded siltstone, pebbly sandstone, pebble to cobble conglomerate, and sparse, thin coal layers. Unit Tc of Nokleberg and others (1992a) consists of poorly sorted, crudely bedded to massive, polymictic conglomerate and subordinate sandstone. AssignCed age of unit Tc is Eocene? because unit locally overlies volcanic rocks of Eocene age. In the Circle quadrangle (Foster and others, 1983), unit Tcs consists of gray or tan conglomerate that grades into gray, tan, or iron-oxide stained sandstone. In the Big Delta quadrangle (Weber and others, 1978), consists of light-gray poorly consolidated, poorly bedded fine to very coarse conglomerate, olive-gray, brown, or orange-brown coarse- to fine-grained sandstone and olive-gray siltstonDe. In the Talkeetna Mountains quadrangle, unit Tsu, consists of fluviatile conglomerate, sandstone, and claystone which contain a few interbeds of lignitic coal and which may be correlative with the Chickaloon Formation (Csejtey and others, 1978) In the McGrath quadrangle, consists of thick- to thin-bedded moderately indurated sandstone interbedded with poorly indurated, laminated, fissile, carbonaceous shale and fine-grained sandstone (Bundtzen and others, 1997a). Also included in E5map unit is limestone conglomerate of the McGrath quadrangle, unit Tcl of Bundtzen and others (1997a). Assigned age is pre-middle Eocene for the sandstone and shale unit as unit is intruded by a middle Eocene dike, whereas the limestone conglomerate unit is assigned an age of late Paleocene? to Oligocene CTsuDTertiaryESedimentary rocks, undividedF Wilson and others, 1998 (DOGmap)'4wilsonAWCWDWFWiWlWdWhWW-W4WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWpWpWpWpWpWpWpWpWpWpWpWpWpW(#ofCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WothersAWW4W4WW4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4WZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWZWWRWSWTWUWVWWWXWYWZWZWZWYWZWZWAw {rocksFWiWlWdW-W4WWWWWWWWWWWWW W!W"W$W%W&WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW), 19981:500000CWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W880-cMWadjacentMWalaskaCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W&W'WA*FMRLFMRLAA3FMRLFMRLA AnnsakeyBnsaunits`A0/ !@HXE Helminthoida and Helminthopsis as well as larger trace fossils possibly formed by moving gastropods." (Nilsen and Moore, 1979, p. 6) Slope facies rocks occur primarily on the northwest side of Kodiak Island and are primarily thick mudstone sequences. These "* * * may form imbricate slices juxtaposed during multiple phases of synsedimentary slumping * * * contain chaotically oriented blocks, slabs, and disordered fragments of hemipelagic mudstone that probably slid from upper slope deposFitional sites to the lower slope or base of slope under the influence of gravity. * * * Sandstone:shale ratios are typically very low, ranging from 1:30 to 1:10." (Nilsen and Moore, 1979, p. 6) Conglomerate and sandstone channels occur locally within the slope facies associations; Nilsen and Moore (1979) mention occurrences in Uyak Bay in particular, where they are on the order of 50-m-thick. Fossils from the Kodiak Formation include Inoceramus kusiroensis of Late Cretaceous (Maestrichti h ABCDEF ABCDEF  ),dh-4҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂҂ҀҀҀҀҀҀҀҀҀҀ҂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܂܀܀܀܀܀܀Ղւׂ؂قڂۂ9hÄA!ÄA#ÄA$ÄA%ÄA'ÄA1ÄBÄCa4ÄG!-ÄQ1ÄRaÄSA%ÄSQÄSa ÄT! ÄhA Äi!&!--!--!--!--!--!--!--!--!--!--!--!--!--Äf666666666666666666666666666666666666666666666666666666666666666666666666666666666666666Äg&Äg1Äg2Äg6ÄgAÄgQTÄgRÄgwÄg+ wilsonWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&Wwilsonandothers1998apmap4V4VWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW uBT ;  I &*o;  ,0=y ,~= ,g5 *; 0y ~ 5 Cpp~i#=L,! andWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&Wapmap4WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW  uS $,.YesNo/,  , : AM PMT $,.YesNo/,  , : AM PMU  V  A/;!/6/!/+G!/N6_Q_+lT; o}I +"#wilsonandothers1998dogmapwilsonfhdettermanrlandduboisgdinpressgeologicfrDVFVVV V V VVVVVVVVVVVVVVVVV V!V"V#V$V%V&VwilsonfhinprepreconnaissancegeologicmapforthekodiaCViVlVdVhV-VVVVVVVVVVVVV V'VaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVaCVL dogmapduboisDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WWWWWW W W W WWWWWWWWWWforCWiWlWdWhW-WWWWWWWWWWWWW WframeworkDWFWWW W W WWWWWWWWWgDWFWWW W W WWWWWWWWWgeologicCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWgeologicalCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWhCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWW/bulletinDWFWMWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WcappsMWcappssr1937kodiakandadjacentislandsalaskausgeologMVewinklerandothers1981V1981ZVVers1978winklerandothers1981ZVVVwrittenW: KotherspMWpamphletDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WpeninsulaDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WWFWMWWW W W WWWWWWWWreconnaissanceCWiWlWdWhW-WWWWWWWWWWWWW WsCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWscaleCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWscientificCWiWlWdWhW-WWWWWWWWWWWWW Wsim-xxxxCWiWlWdWhW-WWWWWWWWWWWWW W8#EVolcanic rocks of Barrier RangeFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.$A1250A*Medium- to coarse-grained, equigranular, granodiorite to quartz diorite plutons and stocks. Typically surrounded by well-developed hornfels zones and sporadic hydrothermal alteration in country rocks. Intrusive bodies typically located along Pacific coast and include large pluton at Cape Douglas*CTiDPliocene and late MioceneEIntrusive rocksFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.%A4230] €A3010M2€@%AC€-ET€4BiL€-@RASCTRASCTRASCTSCTSCTT€-@RASCTSCTSCTSCTSCTTR€-ASCT€-ASCTR€-ASCT€-ASCTR€-ASCT€-ASCTR€-ASCT€-ASCTR€-ASCT€-ASCT€-ASCT€1@^statesCWiWlWdWhW-WWWWWWWWWWWWW WsurveyCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WtheCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WuCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WunitedCWiWlWdWhW-WWWWWWWWWWWWW W W W W'W'WWdWeWfWgWhWiWjWkWlWmWnWoWpW`mapCWiWlWdWhW-WWWWWWWWWWWWW W'W1976EVothersAWBWDWEWFWGWHWIWJWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWjWkWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WW@WAWBWCWDWEWFWGWHWIWJWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWjWkWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WWWWWWWWWWW W W W W WWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W(W)W*W+W,W-W.W/W0W1W2W3W4W5W6W7W8W9W:W;W<W=W>W?W@WAWBWCWDWEWFWGWHWIWJWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW8 1998W4WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW-.9,AGenerally consists of fine-grained biotite quartz monzonite of the Kodiak batholith. Range in composition from two-mica granite to granodiorite. Intrude flysch deposits of the Kodiak Formation and in the vicinity of Jap Bay, intrude the Ghost Rocks Formation. K-Ar ages range between 57.1 to 62.6 Ma with the majority of ages clustered around 60 Ma (Marvin and Dobson, 1979; Moore and others, 1983; Shew and Wilson, 1981), recently reported 40Ar/39Ar ages fall within this range at 57.8 2B.5 and 58.3 0.2 Ma (Bradley and others, 2000). On Afognak Island, the presence of rocks of the batholith is inferred from weak aeromagnetic anomalies (Saltus and Simmons, 1997) and anecdotal reports describing granitic rocks. All contacts on Afognak Island are hypotheticalCTgD PaleoceneEGranitic rocks*wilsonandothers1998dogmapAVVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVlVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVnVandAWDWFWMWW4WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWoWoWoWoWoWoWoWoWoWoWoWoWoWoW*))ASmall altered granitic plutons intrude the Ghost Rocks Formation between Portage and Kaingnak Bays and north of Ugak Bay on the southeast coast of Kodiak Island. Examination of a few thin-sections of these plutons show them to be distinctive from the Kodiak batholith (Tg, this map) in that they are more altered and contain little biotite (W.L. Coonrad and F.H. Wilson, unpublished data). Shown on the Moore's (1967) map as part of unit Tqd, they are here separated because of their distinctB ive characterCTegrDEocene?EYounger granitic rocksFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.,A1320*`,FWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.dA2190A"Lithologically chaotic assemblage of deep-sea rock types." (Connelly and Moore, 1979) Includes: argillite and gray chert containing minor tuff; massive arkosic sandstone; pillowed and massive greenstone; bedded radiolarian chert; minor limestone; and tuffaceous argillite. According to Connelly and Moore (1979) "most of the Uyak Complex is tectonic melange with foliation dipping steeply northwest " and " contains fossils ranging in age from Paleozoic to Early Cretaceous." The Uyak is!LdDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WdatabasesCWiWlWdWhW-WWWWWWWWWWWWW WdettermanDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W&WmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WWWWWWWWWWW W W W W WWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W(W)W*W+W,W-W.W/W0W1W2W3W4W5W6W7W8W9W:W;W<W=W>W?W@WAWBWCWDWEWFWGWHWIWJWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W^W_W`WaWbWcWdWeWfWfWP_ABUUX  $,.YesNo/,  , : AM PM<Arial MS Sans Serif @A9FPTHRPTH NAME WSPCMARI FPTHADATA:Databases:nnsakey.FP5MARIA nnsakey.FP3 NAMEA nnsakey.FP5 RPTHA NNSAKEY.FP5 WSPCAD:\Databases\A1RPTHRolyNAMEWSPCNAMEAKodiakunits.fp5RPTHAKODIAKUNITS.FP5RolyAWSPCAE:\E.1\DB-5\Kodiak\atabases\Xgranite@6gray@~greenschist@ greenstone@h@lhas@[have@hayes@healy@hettangian@hot-blast@however@zhypothetical@in@include@includes@kincluding@indecision@Pinnumerable@interbedded@into@is@island@j@jurassic@juxtaposed@kodiak@l@late@Zlaterally@bless@bless@lenticular@late@3laterally@blenses@nses@liberty@cogabbro@ro@3laterally@blenses@leucogabbro@laterally@blenses@leucogabbro@bbro@ro@@kvl@largely@;glacierWWglaciersWglassyDW!W"WWWWWWWWWs@WWWWWWWWWWgneissicAWAWAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWgneissicAWWWgneissicAWWW; gCvng in size from cinder-size fragments to 1-m-long bombs (Detterman and others, 1987b; T.P. Miller, oral commun., 1991)RCQvD QuaternaryEVolcanic rocks, undividedFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.$ coarseWW Wcoarsesub-angularrockfragmentstofinesandandsilthavi Vcoarse-grainedWWW$WAE(andMWhWWWWW WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWF7locally@bnaknek@Qof@Hrock@Ynaknek@@of@Mrock@5rock@5@5nicandequi@BAnaknek@@of@Mrange@Krock@5river@5@Kriver@55sandstoneandpebblymudstone@K@KOplugs@OOstoneb2nenana@-non-marine@Mnenana@-non-marine@MMa@-nizina@M@nelchinalimestoneb2nenana@-nizina@Malimestoneb2nenana@-nizina@Mquenceunnameddolostonesandstonesiltstone@MMuenceparadiseforkformationandunnamedcorr@Muenceparadiseforkformationandunnamedcorr@Mnixonforksequenceparadiseforkformationandunnamedcorr@Md_`formationW4WWWWWWWWWWW WWWWWWWWWWWfresh-waterMWfresh-watersandstoneshaleandconglomeratelocallycontainMVgabbroichWgabbroicandultramaficrockhVghostWWWWWghostrocksbasalticvolcanicandhypabyssalrocksVghostrocksformationargillite-richunitundividedVghostrocksformationcoherentsedimentaryrocksVghostrocksformationsandstone-richunitundividedVghostrocksformationundividedVglaciationWWWWWglacierWWWWWWWWWWWWWWglobequartziteVgneissWWWgneissWWWWWWsWWWC)1969-bDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W1998AWW@W@W@W@WW@W@WW@W@WW@W@W@W@W@WW@W@W@W@W@W@W@W@WIWIWIWIWIWIWIWIWIWIWIW Ä2h2hhÄ81Ä9kÄ:V&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&V&&i>€FWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.€A580AUnit is 700-m-thick, the lower 2/3 consisting of sandstone and a few conglomerate beds. The upper third is siltstone. A basal sedimentary breccia and conglomerate contains clasts derived from the underlying Sitkalidak Formation; this unit is fossiliferous (Nilsen and Moore, 1979) Overlying the breccia is highly bioturbated massive, silty fine-grained sandstone and siltstone that makes up more than 90 percent of the Formation (Nilsen and Moore, 1979) At irregular intervals, are thin (as3AAndesite, dacite, and leucobasalt lava flows, volcanic breccia, lahar deposits, and debris-flow deposits. Includes air-fall tuff, volcanic dome deposits, block-and-ash-flow deposits, ash-flow tuffs, volcanic-rubble flows, debris flows and hot-blast avalanche deposits. Lava flows and clasts in other volcanic deposits of unit are porphyritic, typically glassy, gray to black, and commonly vesicular. Andesite is overwhelmingly dominant composition and probably constitutes 60 percent or moreB of rocks. Unit typically forms volcanic edifices; it also forms isolated outcrops that cap ridges, providing a good example of topography reversal caused by erosion. Individual flows are locally as thick as 30 m and are laterally continuous over large areas. Unit also includes basaltic, basaltic andesite, and dacite parasitic cinder and spatter cones. Cones are commonly 30 to 300 m high, are steep sided, and have small crater at top. Rocks are highly scoriaceous to vitrophyric, rangiLwFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A2150AOriginally described as limestone, rocks of formation are actually an unusually uniform calc-arenaceous sandstone. Rocks are thin-bedded, medium-grained, and dusky yellow to pale-yellowish-brown on freshly broken surfaces and weather to conspicuous light-gray. They have distinct platy fracture upon weathering and strong petroliferous odor when freshly broken. Inoceramus fragments form major component of formation. Ammonite fossils and other collections from the Herendeen on the Alaska BPeninsula allow an age assignment of Hauterivian and Barremian for formation (J.W. Miller, written commun., 1983-85; Detterman and others, 1996)~CKheDEarly CretaceousEHerendeen Formation i €A105BRange from coarse, sub-angular rock fragments to fine sand and silt; locally includes considerable amounts of pumice near volcanic centersCQaD QuaternaryEAlluvial depositsshallow-marine limestone; they differ, however, in that ultramafic rocks and Triassic limestones occur only in the northerly belt, whereas Paleozoic cherty rocks occur only in the southerly belt. In the Mt. Hayes quadrangle, Nokleberg and others (1992a) mapped two belts of melange between strands of the Denali fault sFMystem, and correlated these with the Windy terrane of Jones and others (1982) CKmarD?Silurian to Cretaceous protoliths; Cretaceous melange formationEMelanges of the Alaska RangeF Wilson and others, 1998 (DOGmap)€A105BRange from coarse, sub-angular rock fragments to fine sand and silt; locally includes considerable amounts of pumice near volcanic centersCQaD QuaternaryEAlluvial depositsswamp depositsCQaD QuaternaryESurficial deposits, undivided:?€B much as 70-cm-thick) conglomeratic layers containing well-rounded granitic and volcanic pebbles, clasts of the underlying Sitkalidak Formation, and disarticulated, broken, and partly rounded megafossil fragments (Nilsen and Moore, 1979). A rich marine fauna is present in the Narrow Cape; Allison (1978) indicated that the Formation contains at least 80 taxa including Acila, Clinocardium, Cyclocardia, Mya, Colus, Cryptonatica, Anadara, Chione, Dosinia, and the gastropod Ficus. The range aCnd variety of invertebrate fossils provide strong indication of warm water conditions with the temperate climate belt of Hall (1964, cited in Allison, 1978)xCTncDmiddle MioceneENarrow Cape Formation€A581>Z€ASiltstone deposited in cool-temperature climactic conditions at outer neritic water depths. Originally included in the Narrow Cape Formation, is now considered a distinctive, older unit. It is highly bioturbated siltstone and very fine-grained sandstone having sporadic conglomeratic layers (Nilsen and Moore, 1979). Nilsen and Moore (1979) report fossils are abundant but of low species diversity. Allison and Marincovich (1981; also Allison, 1978)) indicate this unit "* * * was depositedBk in the outer neritic zone of the continental shelf." Their best interpretation of the depth ranges of the taxa found in the unit suggests deposition was in water depths of 100-200 m; the fauna also suggest a cool-temperate marine climate, significantly cooler than that represented by the younger Narrow Cape Formation to which this unit was originally assignedYCTstiD"earliest Miocene or late OligoceneEW?W@WAWBWCWDWFWGWHWIWJWKWLWMWOWPWRWSWTWVWWWXWZW^W_WaWbWcWdWeWfWkWlWmWnWpWqWtWuWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWUdconglomerateMWWWconnellyWcontainingMWcopperWcopperlakeformationVcreekWWcurrentWWWWWWWWdeepRWdeepRWWWdeepRWWWek_WcW WWWdeepRWWWndcrystal-lithicash-flowtuffdeepRWWithicdeepRWWdeepRWWeepRWW-lithicbWdacite`WdeepRWWWRWRWRWRWRWRWystal-lithicbWdacite`WdeepRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWepRWRWRWRWRWRW@8111-184MW1937MWccomplexgneissVkon-tananametamorphiccomplexkeevypeakformationcalcarVetamorphiccomplexkeevypeakformationcalcarVVVkon-tananametamorphiccomplexmylonitictotatlanikaschisVametamorphiccomplexmylonitictotatlanikaschisVVVananametamorphiccomplexmylonitictotatlanikaschisVVkon-tananametamorphiccomplexschistandamphiboliteVVananametamorphiccomplexschistandamphiboliteVVVVVananametamorphiccomplexschistandamphiboliteVVVVVVVViccomplexschistandamphiboliteVVVkon-tananametamorphiccomplextotatlanikaschistVV1976EWQW1978PW1981ZW1992LWMWNWPW1993LW1998AWBWDWFWGWHWIWJWKWOWRWSWTWUWVWWWXWYW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWjWkWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WW@WAWBWCWDWEWFWGWHWIWIWTSsurficialCWsurficialdepositsundiividedCVtalkeetna4Wtalkeetnaformation4Vterrace WterraneWtrinityWtugidakWtugidakformationVVVWWWWtonaliteW|WWtonalite|WWWWWWWWWnalitehW|WWyWtonalitehW|WWitehW|WWtehW|WW|Wtozitna]W]W]WW\W]W]W]W]W]W]W]W]W]W]W\W]W]W]W]W]W\W]W]W]W]W]W]W]W]W`W`Wtozitnaassemblagesouthmaficandultramaficrocksundivide^V^V^Vthmaficandultramaficrocksundivide^V^V^Vblagesouthmaficandultramaficrocksundivide^V^V^Vtnaassemblagesouthmaficandultramaficrocksundivide^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^Vrocksundivide^V^Vvide^V^V^V^Vvide^V^Ve^V^V^V^V^V^V^V^V^V^V^Vltramaficrocksundivide^V^V^V5U andargillite-richWbarrier#WbasalticWbeach WbrooksWWWcapeWWcapecurrentterraneofconnelly1978VchisikWclendenenWWcoherentW6ajsandstone@Gsedimentary@\shale@Tsurficial@Dultramafic@Sundiivided@^00iivided@0iivided@00ided@>undiivided@0ivided@00ndivided@>undifferentiated@0gesouthultramaficrocksundivided@>undifferentiated@0>undifferentiated@0undivided@0d@000Y\fsandstoneMWWWsandstone-richWschist-Wschistofkodiakisland-VseamsMWWWWWschistandamphiboliteGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVGVschistphyllitelimestoneandgreenstoneVVschistoseWWschwatkaWschwatkalimestoneunitVVVVVQYXof-WWWW#WothersWWplugsWpluton Wrange#WaWaWpebblyaWaWWWpebblyaWaWblyaWaWlepebblyaWaWaWpebblyaWaWyaWWWaWWWWlyaWWWWWWWWWobbleWWpebblyaWWWWWyaWaWaWaWphylliteWhylliteWWWWWWWWdlimestonephyllite_WWWe_WWWWWWllite_WWW_WWWWWWWWWWWWWWWWWWW_WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdlimestone;VphylliteHWIWJW_WWWWWWWandlimestone;VphylliteHWIWJW_WWWWWWWWandlimestone;VphylliteHWIWJW_WWWWWandlimestone;VphylliteHWIWJW_WWWWWWWWWOERock glacier depositsFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A130BConsists of undivided glacial deposits at the outer limits of modern glaciers, glacier remnants, and in isolated cirques (Detterman and others (1987b)CQadDHoloceneE&Drift, Alaskan Glaciation (Neoglacial)FWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A135BConsists of undivided glacial deposits including end, lateral, recessional, and ground moraine and outwash (Detterman and others (1987b)CQbluD PleistoceneE(Drift, undivided, Brooks Lake GlaciationFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A137Zy€Cme, red chert, and granite. The section probably represents conglomerate-sandstone channels enclosing interchannel, lagoonal, and interdistributary bay deposits (Nilsen and Moore, 1981) Very few marine fossils are known from the unit, whereas as abundant plant fragments and fossil leaves have been collected from the siltstone-coal strata (Nilsen and Moore, 1981)ICTskD OligoceneESitkinak FormationFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.€A740>RFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A190BConsists of undivided glacial deposits including end, lateral, recessional, and ground moraine and outwash (Detterman and others, 1987b). Older than late Wisconsin ageCQmhdD PleistoceneEDrift, Mak Hill GlaciationFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A650on, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000./ dogmapAWW4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]WeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWfWfWfWfWfWfWfWfWfWfWfWa& EX@NSACLASSJ SB@SBDA;C3@ F)A-,A*F.dB`D[F]]D2F]{2@{A42@{{{{{2@{42@{42@{{{{42@{2@{{42@{{{{A42@{42@{42@{{2@{{2@{42@{42@{42@{{42@{{2@{42@{6A7D87B98A::B;>A<@A=C>E?AB@BAACBBFACGADCEHBFDGIBHDIJBJDKLALOAMCNQAORAPCQSARTASCTVEUXAVYAWZAX[BY]AZ^E[_B\`A]aA^bA_cB`dBaeAbCeEfR@volcanicrocksFV%V&Vvolcanicrocksofbarrierrange#VvolcanicrocksundividedDV!V"Vvolcanicmember WVVVVnVvrainWvrainunitVVcksnVvrainWvrainunitVVVvrainunitVV-plutonicyWvrainWvrainunitVVVno-plutonicyWvrainWvrainunitVV-plutonicyWvrainWvrainunitVVwestforelandformationVonQVVVrmationQVnQVnQVnQVnQVnQVnQVnQVQWwestforelandformationQVnQVwhirlwindWWWWWWWWwilber_W Wwilbercreekflysch_Vwilbercreekflyschandwolverinequartziteundivided VwishboneOWRWwishboneformationRVwolverineWWW WwolverinequartziteVVVyanertWWWyanertforksequenceandcorrelativerocksVyanertforksequenceandcorrelativerocksfine-grainedschiVVyoungeroWyukon-tananaWWWWWWWWWWWWWWI BMarine beach and estuarine deposits. Moderately well-stratified and sorted sand and gravel on beaches; mud and silt in estuariesCQbD QuaternaryE$Marine beach and estuarine deposits FWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000. A117AMarine terrace deposits. Stratified and moderately well sorted sand and gravel deposits that form nearly level plains ending locally at prominent wave-cut scarps. Terraces occur between 40 and 45 m elevation along Pacific Ocean on the Alaska Peninsula mainlandCQmtD QuaternaryEMarine terrace depositsFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A127BxConsist of poorly sorted rock fragments and debris in lobate forms and typically ice-cored (Detterman and others (1987b)CQrgDHoloceneFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A1151ATholeiitic basalt occurring within both sandstone- and argillite-rich subunits of the Ghost Rocks Formation. Rocks are typically altered by shearing and low-grade metamorphism, yet "* * * these lavas cannot have been derived from a single source and in many respect exhibit chemical affinities to magmas found in a variety of tectonic environments." (Moore and others, 1983, p. 270)CTgvbDTertiary or Cretaceous?E3Ghost Rocks, basaltic volcanic and hypabyssal rocksFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.bHlnaknekWWWWWnaknekformationVnaknekformationchisikconglomeratememberVnaknekformationindecisioncreeksandstonememberVnaknekformationnortheastcreeksandstonememberVnaknekformationsnugharborsiltstonememberVnarrowWnarrowcapeformationVneoglacialWnewhalenWnortheastWfNNuyakdWuyakcomplexdVvolcanicDWFWW!W"W#W%W&WWlWlWWlWlWlWlWlWlWlWlWWWWkWlWWWlWlWlWlWlWlWvolcanicandsedimentaryrocksVVVVVVVVVVVVVVVanicandsedimentaryrocksVVrocksVVVVVsVVksVVVVVVVVVVVVVVVVcksVVVVVVVVVVVVVVVVcanicrocksoftheorcagroupundividedZVvolcanicrocksundividedDVEVFV[VKVLVMVvolcaniclasticnWdWeWfWvolcaniclasticrocksnVvolcano-plutonicyWvrainWWvrainunitVVwestOWQWwestforelandformationQVwilber_W Wwilbercreekflysch_Vwilbercreekflyschandwolverinequartziteundivided VwishboneOWRWwishboneformationRVwolverineWWW WwolverinequartziteVVVyoungeroWD^ultramafichW&W&WhW%W&W&W%W&W&W&WhW%W&W&W&W&W&W&W&WWWWWW%W&WW%W&WWgroupVultramafichWWWWW%W&WWWWW%W&WWW&WW&WWtypeBWultramafichWWWWW%W&W&W]W]W]W]W]WW]W]W]W]W]W]W]W]W]W]W]WWWWWWWWW#W$W%W&W[W\W]WaWWWWW$W%W&W[W\W]WaWWWWWWW#W$W%W&W[W\W]W^WaWWWWWWWWWWWWWXWZW[W\W]W^WaWWWWWWWWWWWWW\DXshaleMWshelikofWshelikofformationVshuyakW WshuyakformationsedimentarymemberVshuyakformationvolcanicmember VsillsWsiltstoneWWsiltstoneoftrinityislandsofclendenenandothers1992VsitkalidakWsitkalidakformationVsitkinakWsitkinakformationVsnugWVVVVVVVskolaigrouptetelnavolcanicsVVVVVVVVVVVVVVVVptetelnavolcanicsVVVVtetelnavolcanicsVVVVVVVskolaigrouptetelnavolcanicsVVVVVVVVVVVVtelnavolcanicsVVVVVVVVVVVVVVnaassemblagenorthgreenstonechertandultramaficrocWVtozitnaassemblagenorthmaficandultramaficrocksXVtozitnaassemblagenorthsedimentaryrocksYVtozitnaassemblagesouthmaficandultramaficrocksundivide^VEBcolyMWcomplexdWlexdWdWolyMWcomplexdWWcomplexdWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW:VconglomerateoftheorcagroupYVconglomeratesandstoneandligniteoVconglomeratesandstonesiltstoneshaleandvolcanicrocksVcorrelativepWWWWWWWWWWWWWWWWWcottaWcreek_WcW WWWpWWWWWWWWWWWWWcrystalbWKWLWbWcrystalandcrystal-lithicash-flowtuffbVcrystal-lithicbWdacite`WdeepRW_bisland-WislandsWkaguyakWkaguyakformationVkamishakWkamishakformationVkialagvikWkialagvikformationVkodiak-WWkodiakformationVlakeWWWWlandslide Wlandslidedeposits Vlimestone cksigneousWWWWVhypabyssalmaficintrusiverocks_VigneousWWWWWWWWWWWWWWWWWWWWWWWWinnokoassemblagegraywackegVkegVgVandvolcaniclasticrocksinnokoassemblagegraywackegVgVgVgVgVinnokoassemblagesandstonegritandargillitecVcVckegVinnokoassemblagesandstonegritandargillitecVcVcVinnokoassemblageultramaficandmaficrocksundividedaVaVaVmaficrocksundividedaVaVdaVaVdedaVaVdaVaVaVaVaVaVaVaVaVaVaVultramaficandmaficrocksundividedaVaVaVaVaVaVaVficandmaficrocksundividedaVVidedaVVLYAReference section consists of more than 638 m of dark-yellowish-brown and dark-gray, thin-bedded siltstone and minor amounts of thin- to medium-bedded olive-gray sandstone (Detterman and others, 1996). Limestone nodules are locally abundant, and limestone beds are present in some siltstone intervals. Depositional environment was interpreted by Detterman and others (1996) to have been moderately deep water, well below wave base and above carbonate compensation depth, in a basin having resBtricted circulation. It is the lowest abundantly fossiliferous member of the Naknek; main fossils present are Buchia Concentrica and a few ammonitesCJnstDKimmeridgian and OxfordianE.Naknek Formation, Snug Harbor Siltstone MemberFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A3012~Ggan) age. Correlated with the Shumagin Formation to the southwest and the Valdez Group to the northeast CKkdDLate CretaceousEKodiak FormationFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A2130AAn informal unit described by Connelly (1978) as consisting principally of medium- to thick-bedded arkosic and lithic sandstone containing occasional sections of vesicular pillow lava and pillow breccia. Slightly metamorphosed and moderately deformed. Two bodies of red pelagic limestone containing many silicieous layers occur within the unit along the southern shore of Shuyak Island. The limestones are thin-bedded and tightly folded and occasional coccoliths of indeterminate age and LatHG|rockhWWrockglacierdepositsVrocksAWDWFWiWlWWWWWW!W"W#W$W%W&WW&W&W&W&W&W&W&W&W&W&W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&WW&W&WWWWWWWWW%W&WWWW%W&WWWWWWWWWW%W&WWWWWWWWWWWWWWWWW%W&WWWWWWWW&WWWWWW]W]W]W]W]W]W]W]W]W]W]W]W]W]WrubyWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWeGV?J€AConglomerate and cross-bedded sandstone and siltstone containing coal fragments. Unit is 1,500-m-thick in its type section along the south shore of Sitkinak Island. According to Nilsen and Moore (1981), the outcrops of the Sitkinak Formation consist of two different facies on Sitkalidak and Sitkinak Islands. On Sitkalidak Island, the lower part of the unit is conglomerate containing rounded clasts of volcanic rocks, graywacke, chert, and carbonate rocks. The upper section of the unit iBs turbidite sandstone and interbedded shale. The overall sequence represents and inner-fan or lower-slope environment with a channel or canyon fill (Nilsen and Moore (1981). On Sitkinak Island, "* * * the formation consists of alternating conglomerate-sandstone units and fine-grained sandstone and siltstone units with some coal and carbonaceous shale strata." (Nilsen and Moore, 1981, p. 19-20) The conglomerate contains well-rounded clasts volcanic rocks, vein quartz, argillite, graywack`]dDth occasional layers of tuff and tuffaceous lime." (Connelly, 1978, p. 760) Variously sized tectonic blocks of massive wacke and contorted thinly interbedded wacke and argillite constitute about 20 percent of the Uyak and have no remaining primary sedimentary structures. Petrographically similar, the two types of wacke are "* * * typically medium-grained, poorly sorted, and have diffuse grain boundaries surrounded by fine-grained matrices of phyllosilicates (mostly chlorite), prehnite, aEnd/or pumpyellite." (Connelly, 1978, p. 760). In the Uyak, mesoscopic shear fractures ad innumerable faults of unknown magnitude have disrupted stratigraphic continuity and juxtaposed contrasting sedimentary and igneous rocks. Slickensides are common as subparallel anastomosing fractures in competent rocks and closely spaced fractures in less competent rocks. Connelly (1978) reports detailed structural analysis indicates the mean direction of slip during deformation was N 38 W 11 anGTRsedimentaryAWWWWsedimentaryrocksundividedAVsequenceWlWlWlWlWlWlWlWlWWVWWWZW W W WkWlWWWWWWW WkWlWWWWWWWWWWWWsequencestWtWtWtWtWtWtWseventymileassemblagegreenstoneandchertTVdchertTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVseventymileassemblageultramaficrocksQVQVicrocksQVQVQVtohWyWtonalitehW|WtrondhjemiteW'tsadakaOWPWtsadakaformationPVtsadakawestforelandandwishboneformationsundividedOVtuffbWpWqWKWLWtuxedniWWtuxednigroupVtyonekKWtyonekformationKVtypeBWultramaficEWFWhWWWWWWWWWWW W!W"W#W$W%W&WQW[%dFfd that transport was southeast under northwest (present day) based on work by Moore and Wheeler (1975) CKmkDEarly CretaceousE Uyak ComplexFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.hA2197A(Gabbroic and ultramafic rock, including layered gabbro, clino-pyroxenite, dunite, and plagioclase peridotite. Occur as kilometer-sized slabs in the northwesternmost exposures of the Uyak that are always fault-bounded (Connelly, 1978). The margins of these slabs have pronounced serpentinization(CKmuD Unknown age, assigned to melangeEGabbroic and ultramafic rockFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.SfundiividedCW'WndiividedCWdCWdCWdCWdCWdCWW)W*W+W,WundiividedCWdCWdCWdCWW*W+W,WundiividedCWCWCWdCWdCWdCW7VgraniticiWlWgraniticrockslVharborWhemlockWhemlockconglomerateVherendeenWherendeenformationVhillWhypabyssalWiliamnaWindecisionWintrusive$Wintrusiverocks$Vandblueschist-V-V-V-V-Vchistandblueschist-V-V-Vchist-V-VVgreenschist-Wgreenschistandblueschist-VVueschist-VVVVist-VVgreenschist-Wgreenschistandblueschist-VVVchistandblueschist-VVVVVVchistandblueschist-VVVVVV-Wgreenschistandblueschist-VVVst-VV-VgritcWgritcWcWcWcWcWcWcWcWcWcWcWcWcWcWgrittyWWWWWWWWmetasedimentaryrocksVVhornblende`Whornblendedacite`Vhypabyssal^W_WtWhypabyssalfelsicandintermediateintrusiverocks^VhypabyssalgraniteporphyrydikesandrhyoliticsillsandpltVhypabyssalmaficintrusiverocks_VigneousWW.[dB a classic melange, containing large tectonic blocks of varying lithology in a matrix of gray chert and argillite and the following description is derived from Connelly (1978). "Gabbroic and ultramafic rocks occur as kilometre-sized slabs in the northernmost exposures of the Uyak * * * are always fault bounded, * * * and serpentinization is pronounced near their margins." (Connelly, 1978, p. 758). Tectonic blocks of rhythmically bedded radiolarian chert are sparse but widely scattered tChroughout the Uyak. Intensely deformed gray chert and argillite form about 45 percent of the Uyak and is the matrix to the other lithologies of the Uyak. Limestone blocks are uncommon in the Uyak and Connelly (1978) reports only 3 localities have bodies of mappable size. Two of the three bodies are contorted sequences of nonfossiliferous thin-bedded white limestone containing thin layers of argillite. The third body consists of "* * * thick-bedded, variably recrystallized grainstone wiFMundivided@fuyak@Rvolcanicrocks@Nyounger@@C1969-b@81998)and@,bulletin@!d@/dogmap@L f@geologic@Oh@gin@integrated@map@(of@others#prep@:scale@states@'wilson@wilsonandothers1998dogmap@+"ewinkler@*inkler@*r@*winkler@*twinkler@*andothers1998dogmap@twinkler@*map@owinkler@*ADCEHBFDGIBHDIJBJDKLALOAMCNQAORAPCQSARTASCTVEUXAVYAWZAX[BY]AZ^E[_B\`A]aA^bA_cB`dBaeAbCeEfVQlocallyMWmaficWmaficdikessillsandplugsVmakWmarine W Wmarinebeachandestuarinedeposits Vmarineterracedeposits VmemberWWWWWWhjemiteVlimestonebWfWgW WlocallyMWMWlocallyMWMWstonebWfWgW WlocallyMWMWMWVlimestonebWfWgW WlocallyMWWlocallyMWWWfWgW WlocallyMWWlocallyMWWWlocallyMWWWWcallyMWWWWWWWWgW WWW WWW W W W WlimestoneandchertVVneandchertVVhertVVVVVVgW WWlimestoneandchertVVVVVVVVVVVVVVVVVVlimestoneandmarble1V1Vandmarble1V1V1V1V1V1V1VV1V1VVV1V1V1V1V1V1V1V1V1VVVrineRW\W]Wmarinemudstoneandsandstone]Vmarinesandstoneandsiltstone\VmatanuskaQWmatanuskaformationQVestoneÄ2@9ÄA!@h@g11o@1975@1978@m1979@p1981@,1991@1992a@1996@q19971997a@2000@ 40ar/39ar@58.3@a@about@aeromagnetic@afognak@~agexages@all@altered@amounts@an@and@\andesite@andesitedaciteandleucobasaltlavaflowsvolcanicbreccia@are@Barea@.areas@as@ash-flow@at@basalt@=based@batholith@9because@1bedded@been@between@obig@biotite@jblock-and-ash-flow@!bounded@buchia@ia@ia@chia@buchia@hia@stomylonitic@boudins@buchia@s@buchia@buchia@chia@chia@uchia@uchia@ltst@nenana@north@not@orthogneiss@B7SdepositsCWWW W W WWdikesWdriftWWWWWdriftalaskanglaciationneoglacialVdriftiliamnaadvancebrookslakeglaciationVdriftmakhillglaciationVdriftnewhalenadvancebrookslakeglaciationVdriftundividedbrookslakeglaciationVestuarine WfanWWWWWagleWequivalentkWlWmWnWWfaciesAWfelsic^WkWfelsicintrusiverockskVfine-grainedhWiWflowspWqWflowstuffandbrecciaundividedpVqVfluviatileTWfluviatilesedimentaryrocksandsubordinatevolcanicrocksTVflysch_W W W W Wflyschsequence Vflysch-likexWflysch-likesedimentaryrocksxVforelandOWQWformationIWJWKWPWQWRWUWVWdWOWQWcWWWW2W3W4WpWWWformationsOWWgabbro.~WDWFWPWWgabbrodiabaseandmetagabbroDVFVgemukBWgemukgroupBVcsillsandpltVhypabyssalmaficintrusiverocks_V" AAHP LaserJet 5/5M PostScriptw odXXP?Rp_A+RdB|Custom page 1|CCCustom page 2|CCCustom page 3|CCfA~0'dJssRocks, basaltic volcanic and hypabyssal rocksciationmap)^RCundividedAWDWWWWW!W"WunitWW]WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW*W+W,WvolcanicDWEWFWSWTWZW[W\WdWeWKWLWMWXWYW`WiWjWkWlWmWW:WOWvolcanicandsedimentaryrocksundividedSVvolcanicgraywackeandconglomerateXVYVvolcanicgraywackeandmudstone`VvolcanicrocksiVjVkVlVmVvolcanicrocksofthecantwellformationdVvolcanicrocksoftheorcagroupundividedZVvolcanicrocksundividedDVEVFV[VKVLVMVvolcaniclasticnWvolcaniclasticrocksnVvolcano-plutonicyWvrainWWvrainunitVVwestOWQWwestforelandformationQVwilber_W Wwilbercreekflysch_Vwilbercreekflyschandwolverinequartziteundivided VwishboneOWRWwishboneformationRVwolverineWWW WwolverinequartziteVVVh0.2lW1W W1-m-acrossW1-m-longDW!W"W1-m-thickWW10-W W10-40W100 W100-200W100-m-thickW11 W6911q692069306931r694069446945695269556956696069656966701072407242725072907291730073207325P73307402752075807610771077117907958000825083008310834083508410843084508558600860186108620862586308632863386408641865086608708700871088088018802890900910932093219322932393249325932693279400950951952990.2aW0.25`W0.5aW0.7 W1KWeW WtWWWWWWWWWWg :Q€CTtgD#late Pliocene and early PleistoceneETugidak FormationFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.€A565ADiamictite, sandstone, and siltstone. Conglomerate horizons contain clasts of granite, chert, melange, and slate. Also contains distinctive calcareous shale clasts unlike any nearby exposed units. Calcareous shale clasts contain a late early Miocene fauna of foraminifers and flora of diatoms; however, unit in which these clasts are enclosed is correlated with part of the Yakataga Formation of the Yakutat area, 500 km to the eastCTyDPliocene or late MioceneE=Albatross sedimentary sequence of Clendenen and others (1992)_predominantlyCWprehnitedWprehnite-pumpellyiteWpresencelWWpresentdW4WWWWWWpreserved-WW W WWWWWWWWWWWWWWWWWWrvedWWWWpress%W&WpresumedWWWWWWmedWWWrvedWWWWpress%W&WpresumedWWWWWWWWWWWWWWWWWWWWpreviousWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWousWWWWusWWWWWWWWWWWWWWWWWWWWWWWWWWWWWsWWWWWWWWWWW}formationAWiWlWW4WWWWWWWWWW WWWWWWW%WformationsMWWformedWformsDWW!W"WWW[WW[WW[WW[WW[WW[WW[WW[WW[WW[WW[WW[WUWUWUWUWUW0WUWUW0WUWUWUWUWUWUWUWUWUWUWUWUWUWUWWWWWWWWWWWW[JhiWhalfWhallWhanson W&WharborWhardWWhiWhiWnahiWhiWhiWhiWhiWhiWhiWhiWhiWhiWiWiWiWiWiWWhiWiWhiWiWiWiWiWiWiWiWiWiWiWiWiWiWiWWhiWWW&WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWhWWWWWWWWWWhWWWWWWWWWhachuredWfirst-Wfirst-cycleWfissileAWfloraWflowW%WflowsDWFW!W"W#W%W&WfluteWWWfluvialWfluviatileAWtileAWAWileAWAWileAWAWileAWAWAWOWWOWOWWWWWWWWWWWWWWWWfluviatileandalluvialfeldspathicandbiotiticsandstonecVVVVecVVVVVVstonecVVVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVecVVcVVcVVnecVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVcVVuviatileandalluvialfeldspathicandbiotiticsandstonecVVcVVonecVVcVVcVVcVVcVVcVVcVVonecVVcVVVdstonecVVcVVcVVndstonecVVcVVVCsoralDWW!W"Worange-brownAWorderWWorientedWoriginWoriginal-WW&WrownAWWrownAWWnAWnAWnAWorange-weatheredW4pumiceWpumpyellitedWpyroclastic#WWWWWWWWWWWWWWWWWWWWWWm,]1979lWdW-WWWWWWW W WW%W&W1980WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWS1996W4WWWWWWWWWWWW1997lWWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWWTWmappedAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWoccurdWhWWWW WoccurredWWoccurrenceWoccurrencesWoccurringWoccursWWocean WodorWW&Wanic-platedWdWlatedWdWdWdWdWdWdWdWWWdWdWdWdWdWdWdWdWdWdWdWatedWdWdWdWdWdWdWdWdWplatedWdWdWdWdWdWdWtedWdWdWdWdWdWdWdWdWdWdWdWdWnic-platedWdWdWodWWWWWWMWoceanicdWWoceanic-platedWoclsWodWWWWW/_membersWW WWmentionWmesoscopicdWmesozoicWmetabasite-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW7{othersAWDWlWW-W4WWWW WWWWWWWWWWWWWWWWWW!W"WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlW~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~WdepositsCWDWFWlWW W WWWWWW!W"WdepthWWdepthsWWderiveddWWWdescribedWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW rocksroeske-W WWWWWWWWW~ ageWWWWWWWWWWJ€AUniform sandstone and siltstone in graded beds and a few conglomerate beds for a total thickness of about 3,000 m. A fossil crab, Callianassa aff. C. porterensis, indicates an Oligocene age (Moore, 1969); Moore (1969) assigned an Eocene and Oligocene age based on this fossil and evidence from superposition; Clendenen and others (1992) report Eocene foraminifers but unaccountably only report an Eocene age for the unit. Because of the reported presence of an Oligocene-age fossil crab in thB`is map unit, the unit age is herein revised to conform to Moore's (1969) original age assignmentNCTsiDOligocene and EoceneESitkalidak FormationFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.€A1780Hhowever4WWWWWWW&Whydrothermal$WWWnWnWnWnWnWnWhundredxWxWxWxWxWxWxWxWxWxWxWWWWWWWe=variablydWvariesWvarietyWWvariousAWsAW&W&W&W&W&WAW%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W%W&W&W&W&W&W4WvarietycWgWvariousAWOWSWWWZWdW%W&W&W&W&W%W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&WjWjWjWjWjWjWjWjWjWjWjWWWWWWWWWWWWWWWWWWWWWWWWWW( TeWearlydW4WWWWWWW WeastWW&WterneasternsternsternsternsternWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWk formsfossilWWxafognaklWW WafterWageAWdWW4WWWWWW WWWWWWWWWWW W%W&WlWlWlWlWlWlWlWkWlWlWkWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWcontactslWWW WcontainAWiWWWWWcontainingAWMWdWWWWWWW WW WcontainsdWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW]*containscontinuity@'coonrad@ correlation@-crater@crossite@ crudely@dacite@zdark-gray@;data@day@theyiWWWWWWWthickAWDWWWWWW!W"WthicksectionsofargilliteandlocalmassivesandstoneandVthick-beddeddWWWWWWWW WthicknessWWW&WthicknessesWthinAWdWW4WWWWWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWvoligoceneAWWWoligocene-ageWolive-grayAWWWWolive-graytogreenmedium-beddedfinetomedium-grainedgraVonMWiWlWdWW4WWWWWWW W W WWWWW W%W&W&W4WkWlWlW4WkWlWlWWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWonWWWWWWWWWWWWWWWWWWWWmDWWWWWWW WWWWWW W!W"WmalW-W WW%WmackevettWmaestrichtianWWmaficWmagmasWmagnetiteWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW5WWWWWWWWWWWWWWWWWWWWWWWWWWWWmackevettWWW2W3W5WWWWWW5WWWWWWWWWWWWWWWWWWW andand/ordW0A1978W1992WWadvanceWWafognak Wafognakpluton ValaskanWalbatrossWalbatrosssedimentarysequenceofclendenenandothers1992VVkali~WamphiboliteAWGWHWIWJWamphibolitefaciesmetamorphicrocksAVamyWWamycreekunitVVandOWSWTW\W^WbWcWeWiWjWmWoWpWqWrWsWtWuWvWwWxW|W}W~WEWFWGWHWIWJWSWUWXWYW[W\W]W^W`WaWhWoWpWqWWWWWW W WWWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W-W.W1W5W6W:W;W<W=W>W?W@WAWBWCWDWFWGWHWIWJWKWLWMWOWPWRWSWTWVWWWXWZW^W_WaWbWcWdWeWfWkWlWmWnWpWqWtWuWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWV1hbeddedAWdWWWbedding-WbedsWWWWWWW WWW WBWHWIWJWTWbela^W_WhWuWvWwWbelowZW\WbeltGWHWIWJWbelugaHWbethelBWbetter\WbetweeneWlWmWuWvWwWyW@WRWbigAW^WuWvWwWbiotiteVWfWgWhWiWjWmW{WEWFWGWbiotitebiotite-hornblendeandhornblendegranodioritequarthVbiotite-amphibolefWbiotite-bearingfWbiotite-bearingperalkalinealkali-feldspargraniteandbiotfVbiotite-hornblendegWhWiWjWmW{Wbiotite-muscovitelWbiotite-plagioclasefWbiotiticVWbioturbationPWbituminousSWUW[Wblack]W_Wblastomylonitic@WblocksWbodies[WeWkWmWyWzW|WW@WbordereWkWbothMWNW[W^WboulderPWYWboumaRWboundaryRWboxBWbrachiopodsXWYWbraidedPWVWbrecciaWWZW\WcWdWpWqWuWvWwWxWBWXWYWbroadlyVWbrownAWSWbrownish]Wbrownishblackolivinebasaltvesicularinpartlocallydisp]VbroxsonEWFWVisAWDWlWdWW-W4WWWWWWWWWWW W WWWWWWWWWWWW!W"W%W&WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWochronWWisoclinally WisolatedWisomSWisotopic-W.WitBWeWWWWWWWWWWW W!W"W#W$W%W&W5W6WNW_WWWWWWWWWWWWWWWWunderdWWundergoneWunderlie&Wunderlying4WWWWWundividedWWWunfossiliferousWuniformWWuniformsandstoneandsiltstoneingradedbedsandafewconVW]W]W\W]W]WW]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]W]WtWtWunequivocaleWeWeWeWeWeWeWeWeWeWundividedKW<W[W\W]WtWunequivocaldWeWeWeWeWeWdWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWfWKW<W[W\W]WtWuWunequivocaldWeWfWWWWWWWWW W W W W WWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W-W.W/W0W1W2W3W4W5W6W7W8W9W:W<W=W>W?W@WAWBWCWGWHWIWJWf6@alluvial@Aand@5Ecoly@Uconglomerate@Bdeposits@dformation@7granitic@_island@V/lgranitic@/ion@lgranitic@/Lflysch@lgranitic@/anitic@/flows@lflows@lflows@lneandcorre@Lflows@llediate@,limestones@7mccarthy@6mchugh@4metamorphicbasementrocksofthenixonforksequencemeta-q@]metamorphicbasementrocksofthenixonforksequencepeliti@\metaplutonic@Jmysticanddillingerstratigraphicsequencesundivided@Fmysticstratigraphicsequenceolderlimestone@Emysticstratigraphicsequenceshaleandchert@Dmysticstratigraphicsequencesheepcreekformationandcorr@Cmysticstratigraphicsequencetatinarivervolcanicandequi@BlAmysticstratigraphicsequenceundivided@@nelchinalimestoneb2nenana@-nixonforksequenceparadiseforkformationandunnamedcorr@M@0fmoreDWiWWWWWWWW!W"Wmorphology WmostdW4WWWWWmostlydWWmountAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWlOsortedAWdW W WWsourceWWWsouthWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&WEWsoutherlyeWfWgWsoutherngWlWmWBW WWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W0W4W5W7W8W9WgWsouthwest@W W WWWWW-W.W5WJWKWLWsouthwesternyWzWRWiWjWkWlWmWNWdWeWfWgWspeW W2W3W:WspanneddWsparite;WsparseAW[WWDWFWsparselyiWjWkWlWmWsphene@Wspiculite2W3W6Wspiculitic2W3WspiliticVWWWsppWspurious[W\W]WspurrWsq7W8W9Wsqd0Wsqm0WstjWrWWkP7includinghW-WWWWincreasesWW-W-W-W-WompetentdWdWdWdWdWdWWWWWWlWmWWWWWWW-WincompetentdWWWlWmWWWWWWW-WincompetentdWWincreasesWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWcreasesGWWWWWWWWWWWWWWWindianbWcWindicateXWaWcWeW W-W.W0W2W3WJWKWLWMWoWuWindicates WW/W2W3WdWeWfWindicatingOW:WkWlWmWnWindicativeuWindividual1WinduratedAWHW Winfer;WgWinferencecWdW2W3WinferredWWWWWWWWW W!W"W#W$W%W&W/W4WQWWWWWWWWinfoldedQWinformal[W\W]W^W`WdWeWfWWW andWWWWWWWWWWWWWWWWW W W W W WWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'Wtic galena in carbonaceous phyllite-hosted stratiform zinc-lead deposit also indicates a Mississippian or Devonian age for mineralization (Dusel-Bacon and others, 1998). Late and Middle Devonian fossils have been reported in the Mount McKinley quadrangle (GilbeCrt and Redman, 1977). Unit appears to occupy regional stratigraphic position between the Totatlanika Schist and unit PzZyqs of this map. As mapped, includes the Keevy Peak as originally defined by Wahrhaftig (1968) in the Healy and Mount McKinley quadrangles; new age data support extension of the unit to the Big Delta, Circle, and Fairbanks quadrangles, and correlation with the Nasina assemblage in Yukon Territory proposed by Weber and others (1978). Includes unit Pzq in the Big Delta (1exposuresdWhWW&WextensiveWxtent Went W W W WW W W Wtinizedultramaficrocksincludingdike-likeextentVW WWWWWWWWizedultramaficrocksincludingdike-likeVextentVW WWWWWWWWWWizedultramaficrocksincludingdike-likeVextentVW WWWWWtVW W W W WVW W W W W W W WVW W W W WentVW W W W W W W W W W W W W W W W W W W W WentVW W WWWWWWWWWWWWWineAWnW}WGWPWRWSWUWfinetomedium-grainedhypautomorphicgranularquartzdiorit}Vfine-grainedAWaWBWUWfinerTWfinesPWfissileAWflatsTWflow@WflowsDWEWTWVWWW[W\WbWdWeWoWpWqWuWvWwWxWyWKWLWOWfluteRWfluvatileHWOWfluvialCWfluviatileAWRWTWUWVW[WOWfluviatileandalluvialfeldspathicandbiotiticsandstonecVVp_porphyriticDW!W"WportageiWporterensisWpositionW%WpossibleAWpossiblyWWpotassium-argonW%WWWWWTWpossibly]WdWWWpost-albianPWppascWWpascWWWWWWWWWascWWWWWWppascWWWWWWWppascWWWppascWWWWWWWWWppascWWpost-norian2W3WpotassiumWWWppascWWWWWWWWWWWWWWWWWWmediumtomedium-dSVpredominatecWprefer_WpreferredTWprehniteVWprehnite-pumpellyiteWW Wpresence_W WpresentkWOWRW[WeWfWgW2W3WJWVWpreservedWWWWUWhWiWpressDWEWKWLWMWNWWWWWWW W!W"W#W$W%W&W0WtWuWWWWWWWWpresumablypWpresumedWWjWWxnorthiWWnortheastWnorthernWnorthernmostdWnorthwestdWW W WnorthwesternmosthWhWhWhWhWhWrnmosthWhWsternmosthWhWhWhWhWhWhWhWhWhWtnortonZW`W`W`W`W`W`W`W`WWWWWWWWWWWWWWWWWYWnortonZW`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`WonZW`W`W`W`WnortonZW`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`WortonZW`W`W`W`W`W`W`W`W`W`W`WWW`WWWW[W]WgWlWmWuWvWpartingsRWpartsTWUWmWpattonbWcWoWpWqWuWvWwWpatton's[WpebbleAWHWYWpebblyAWMWNWYWPA106BRange from coarse, sub-angular rock fragments to fine sand and silt. Typically have well-developed cone shapes or are multiple cones coalescing into apronsCQafD QuaternaryEAlluvial fan deposits ntacts with pillow basalt. Unit typically occurs to southeast of sandstone-rich unit. Planktonic foraminifers yielding Late Cretaceous and early Tertiary ages (3 collections)vCTghsD Paleocene?E5Ghost Rocks Formation, argillite-rich unit, undividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A106BRange from coarse, sub-angular rock fragments to fine sand and silt. Typically have well-developed cone shapes or are multiple cones coalescing into apronsCQafD QuaternaryEAlluvial fan deposits A1151A1151mkflyschlWfolded-WWWWfoldingWfoldsWfoliationdWfollowedWfollowingdWforAWW-WWWWWWWWforaminifer WforaminiferaWforaminifersWWWformdWW WWWWW4WforkcWWkcWkcWkcWkcWforkcWkcWkcWkcWkcWWforkcWWWrkcWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWaminiferadWeWWforbesWWforkcWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW(W)W*W+W,W1W4W5W6WpWrWWWWWWWWWWWWWWWWWWformationsHWMWNWWjWWWformedWWWWWWformerlybWWWforming0Wforms[W0WUWW3nodW-WWW W&WnodulesWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWNWTWdWgWlW}W@WEWFWGWHWIWJWKWLWMWNWeWfWgWWWWWWWWWWWWW W!W"W#W$W%W&W0W7W8W9W=W>W?W@WAWBWCWGWHWIWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWnon-marineSWnonmarineHWSWTWUWZWtWnonplutonicWWWWWWWWWWnorian2W3W:WkWlWmWnWnormalZW)monzonitelWmoorelWdW-WWWWWWWWWWW W Wmoore'siWWmorainalWmoraineWWWmorainesWWW|W}W~WWWWWWWWWWWWWW^W^W^WWWmorainesWWWW4WJWQW_WbWWWWWWWmostRW[WgWkWzWHWIWJWdWfWgWiWjWkWlWmWUWWWWWWWWWWWWWWWWWWWmostlyQWyW-W.WWWWWWWmotionsdWmountAWTW^W_WcWdWgWhWlWmWuWvWwW}W~W@WEWFWGWHWIWJWrWsWtWuWvWwWxWyWzW{W|W}W~WWWWWWW5W7W8W9W=W>W?W@WAWBWCWGWHWIWPWtWuWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWW5WWd2`structuraldWstructurally4WWW W W&Wstructure&WstructuresdWWWWWWuresWWesWWW]WWWWes]WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWCWsubangular_WsubbituminousMWNWsubcircularis7W8W9WMWkWlWmWnWsubdividedHWOWBWTWZW_W WvWwWWsubdivisions`WWsubductiondWsubjacentpWsubjectedWWsublaevis WsubleavisaW Wsubmarine^W`WW=W>W?W@WAWBWCWWsubordinateAW[WbWGWHWIWJWQW\W^WeWiWjWkWlWmW WWW5W7W8W9WJWWW^W_WaWcWdWeWfWkWlWmWnWpWvWwWW }1997aAW1:1W1:10W1:30W1:5W1:63360-scaleW2W2.5lW2/3W20dWW200 WWWWWWWWWW2.5lWWWWW2.2WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW200EWkWlWmWnW2000JW210XW25fWWWWWWW W!W"W#W$W%W&W25-m-thickoW269[W\W]W27fW28xW29fW@W295W3eW WtWWW3.4W30kW W1WWW30-45cW30-m-thickWW30.6HWIWJW302dWeWfW3090W31fW31.9GW311WW319W32fW34gW34.8kW35WW350WWligniticAWlimedWlimestoneAWdW4WWWWWWWW W&WlimestonesWlimitedW&WlimitedtonorthernhalfofalaskapeninsulaconsistsofmasVlimitsWlithicWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWlimestonebodieswithintheoutcropareaoftheundivideddiuVuVuVuVuVuVuVuVlimestone-chertoWoWoWoWoWdark-grayshaleand\V8bundtzenAWbutdWWWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWtaclastiteWcenterbWcenters[WcentralDWEWeWKWLWcephalopodsaWchapman\WlWpWqWuWvWwWRWSWTWXWYWcharacteristic_Wcharley_WchertBWoWWBWRWWWXWYW[W]W^W_WdWeWhWchert-pebbleMWNWeWcherty\WeWchickaloonAWVWWchieflyFWGWdWyW{W@WBWCWDWEWFWMWNWOWWWXWYW]W^W`WiWjWn AConsists of 40 m of thin- to thick-bedded, medium-grained, crystalline tan to gray limestone containing thin interbeds of chert, located on a small islet (100 by 200 m) at entrance to Puale Bay. No contacts are exposed, although highly contorted beds dip about 40 degrees northwest, which places them structurally beneath Triassic rocks located on other islands about 1 km away. Hanson (1957) reported age of late mid-Permian (early Guadalupian) on the basis of poorly preserved and silicifiB-ed coral, brachiopod, and foraminifer fossilsCPlsDPermianE LimestoneFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.!A311}8fossiliferousWWWWWWfossilsdWWWWWWWWWWWWWWWW WfosterAWfoundWWWWWWfourWWfractureWfracturesdWfragmentsDWWWWWW WWW!W"WfreshWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW4W7W8W9WGWHWIWJWKWLWNWOWPWQWUWZW_WbWdWeWfWgW emplacementW WenclosedWenclosingWendWWWWending Wentrance WenvironmentWWWWWenvironmentsWeoceneAWWeolianCWWepiclastic#Wepidote-Wequigranular$W$WWWWWlentWWWWWWWWWWWWWWWWWWRWWWWtcWRWWWWWWWcWRWWWWRWWW,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,WWWWWWWWWWWWwWWWWWWWWwWWWWWWWwWWWWwWWWWWWWWWWvWwWWWWWWWWWWWWWWWWWWWWWWWWequivocalWWWWquivocalWWWWWWWWivocalWWW!W"W#W$W%W&WeventsWWexcept|WexplainedcWexploration W 40ar/39arlW42W45dW W46-m-thickW5.1-W5.6-W5.8-W50-m-thickW500W5000W5000-m-thickW57.1lW57.8lWWW[W[W[W[W[W[W[W[W[W[W[W[W[W[W[W[W[Wck5000[W[W51/W/W/W/W/W514WWWWWWWWgcWaccretionaryWWaccumulationsbWacrosskWageAWHWKWPWVW[W^W_W`WbWcWdWfWkWoWuWagesVWaWdWgWiWjWkWlWmWagglomeratedWalaskaLWMWNWalkali-feldsparfWgWalllWmWalluvialPWUWVWalongoWalsoAWDWEWKWOWSWTW[W]W^W_WbWcWdWeWfWgWkWlWmWpWqWuWalsoincludesunnamedfluvatileconglomerateandcoal-bearinOValtereddWiWjWalthoughdWamountsMWNWanAWmWanchoragePWWW[W^W_WfWgWhWkWandAWBWCWDWEWFWGWHWJWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWjWkWlWmWnWoWpWqWrWsWtWuWandesiteFWGWTW[W_WaWbWcWdWB 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WWperidotiteEWFWUWXWaWWWWWWWWWWWWWWWWW]WgWpWtWpersonal_Wpervasive@WWWpervasivelyWWWW WpeweQWpggWpgcRWSWTWphaWphacoidallyWphase(W)W*W+W,W4Wphases@WHWIWJWphlogopiteWWWWWW W!W"W#W$W%W&Wphosphatic;WkWlWmWnWphylliteHWIWJW_WWRWSWTWYW_WdWeWfWphylliticOW;W_WvWwWpillowWWZW]WWoWpWqWPWRWSWTWVWYWkWlWmWnWtWxWpillowsWpilotaxiticrWsWpinkuWvWwWJWpjaHWIWJWpjcgHWIWJWpjtHWIWJWplaceWWplacedGWplacementRWplacescWWYWplafkercWWW0Wplagioclase WzvhypotheticallWWice-coredWigneousdWWiliamnaWimbricateWimlayWimportantWW W W W WqW W W W W W W W WWqW W WWpWqW WWWWqW WWWWqWimportant4WimprecisePWimpureoWpWqW WWWWWqW W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWpWinches[Winclude[W\WuWvWwWWWcWincludedAW[WbWgWoW@WRWTWoWincludesAWBWDWEWFWKWOWSWTW[W]W^W_WbWcWdWeWfWgWmWpWqWrWsWuWvWwWxW{WAWBWGWHWIWJWKWLWMWOWRWXWYWZWiWjWkWlWmWincludesanumberofdifferentunitsmappedinvariousareasAVincludesawidevarietyofgraniticrocksexposedthroughoutgVincludesrubbleofmetasiltstoneandchertinthekantishnaBVatheiriWdWWWthemiWW W 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WWWWWW6W:W;WJWNWOWbWcWgWkWlWmWnWoWpWtWvWwWxW)2minordW4WWWWWWWWWWWWWWWWWWWWWWWkWlWWWWWWWWWWWWkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWa_WmlueWmmpWWWWWWWWWWmnleWmnoeWmoderatelyAWHWLWdW@WAW]W_WKWLWmoderatelydeeptodeepmarinesequenceoftightlyfoldedanKVLVmoffitWWWWmolWmoll-stalcupcWTWmolluscan\WmonomictWmonotis2W3W7W8W9WMWkWlWmWnWmonotonousXW Wmonotonoussequenceofintenselydeformedandlocallyhighly ValllWWallawayWallisonWWWallowWWalluvialCWalmostWalongWWW W W$WalsoAWDWWWWWW!W"Walteration$W$WWWWWWWWWWWWkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWJWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWandalusite@WandesiteFWGWTW[W_WaWbWcWdWxWyWHWIWJWMWNWeWiW<FWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A1955AConsists of a measured thickness of more than 1,200 m of dark-gray to pale-brown, typically thin-bedded, shale, siltstone, and fine-grained sandstone. Proportion of sandstone in unit increases up-section. Load and flute casts are common; in upper part of unit, graywacke is graded with numerous rip-up clasts. Overall depositional environment of formation is near mid-fan within multi-channeled system; however, uppermost part of unit may have been deposited in upper-fan regime (Detterman aBnd others, 1996). In general, fossils are sparse; however, in lower part of unit they are locally abundant. Ammonites are most common and may range in size to as much as 1-m-across. Fossils allow age assignment of latest Campanian and early MaestrichtianCKkDLate CretaceousEKaguyak Formation"pebbleAWWWpebble-cobbleWpebblesWWpebblyAWWWpelagicWpelecypodWpelecypodsWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWpeloidWWWoidWWWWpeloidalWWWW|pillow@@plagioclase@Jpliocene@plutons@poorly@pporphyritic@pre-middle@_predominantly@jprimarily@pumice@oquadrangle@Equartz@radiolarian@range@ranging@recently@relict@}reported@reversal@rock@*rocks@AFwroot@saltus@scattered@ scoriaceous@sediment@separated@Vshale@shear@shear@shear@shear@Vseveral@@sediment@separate@Vseveral@everal@ultramaficrockalteredbaslatgreenandmaroo@andmaroo@eenandmaroo@roo@enandmaroo@amaficrockalteredbaslatgreenandmaroo@@ficrockalteredbaslatgreenandmaroo@ockalteredbaslatgreenandmaroo@maroo@rcalatedsequenceinvario@units@wm@4zoned@026}goodDW!W"Wgradational4WgradedWWWWWgradesAWgraindWgrainsWgrainstonedWWdW W W W W W W W W WscW W WcW WWWcW WWW WrainscW W W W W W W W W W W W W W W W W W W W W WJWJWJWJWJWgrainstone5W5W5W5W5W5W5W5W5W5W5W5W5W5W5W5Wstone5W5W5W5W5W5W5W5W5W5W5W5W5WWWWWWWWWWWWWWgWlW{W@WGWHWIWJWTWWW`WoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WWgranodioritegWhWiWjWmW{W@WVWrWsWtWuWvWwWxWyWzW{W|W}W~W(W)W*W+W,W0WyWzW{W|W}W~WWWWgranodioriteofrainbowmountaininthemounthayesquadrangyVzV{V|V}V~VgrantzbWgranular}WgranuleHWSW;Wgranules_WhWiW$radiolariandWrandomlyWWWdWdWdWdW W W W W WW W W W Wiolarian WW W W W W W W W W W W W W Wan W W Wradiolarian-bearingeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWfWfWfWfW%W&WrampartXWYW`WbWrangeLWMWNW[W^WbWcWgWyW|W@WCWDWGWHWIWJWfWgWrWsWtWuWvWwWxWyWzW{W|W}W~WW WWWW'W(W)W*W+W,W4WUWXWdWeWrangeskWuWvWwWzW_WiWjWkWlWmWWWWWWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W-W.Wranging[WdWWWrapidVWWrare_WaWdWnWWWWW WRWSWTWaWrarelyfWgWraspberry-W.WratherUW$"B of rocks. Unit typically forms volcanic edifices; it also forms isolated outcrops that cap ridges, providing a good example of topography reversal caused by erosion. Individual flows are locally as thick as 30 m and are laterally continuous over large areas. Unit also includes basaltic, basaltic andesite, and dacite parasitic cinder and spatter cones. Cones are commonly 30 to 300 m high, are steep sided, and have small crater at top. Rocks are highly scoriaceous to vitrophyric, rangiCvng in size from cinder-size fragments to 1-m-long bombs (Detterman and others, 1987b; T.P. Miller, oral commun., 1991)RCQvD QuaternaryEVolcanic rocks, undividedFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.#A1051BoBreccia, lava flows, sills, and local pyroclastic and epiclastic tuff, southeast of active part of Aleutian ArcCTabD late TertiaryrpcausedDW!W"WcentersWchannelWchanneledWchannelizedWchannelsWWWentralWWWWWWWWcephalopodsaWaWhalopodsaWaWdsaWaWphalopodsaWWsaWWWWWWWodsaWWWopodsaWWalopodsaWWtimetersWcentraleWWWWWcephalopodsaWWaWaWaWaWaWaWaWaWaWephalopodsaWaWaWaWaWaWaWaWaWaWcf9W9W9W9W9WWWWWWWcephalopodsaWcf7W8W9W9W9W9W9W9WW8W9W9W9W9W9W9W9WWcf7W8W9W9W9W9W8W9W9W9W9W9W9W9W9WW9W9W9Wcf7W8W9W9W9W9WctertiaryAWWtextures-WtgiWthanWWWWWWWWW%WthatAWDWiWdWhWWWWWWW WWWW!W"WWWWWWWWWWWW-WWW-WWWWWWWWWWWWWWWWWWWWWWW-WWWWWWWWWWWW-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W(W)W*W+W,W-W.W/W0W1WhnADetterman and Reed (1980) divided unit into three members, in ascending order, Bruin Limestone Member, middle member, and Ursus Member. On Alaska Peninsula, Triassic limestone strata were assigned to the Bruin(?) Limestone Member of the Kamishak Formation by Detterman and others (1996). Reference section of the Kamishak was measured near Puale Bay by R.M. Egbert (U.S. Geological Survey, 1979, cited in Detterman and others, 1996, section in Karluk C-4 and C-5 1:63,360-scale quadrangles). B Section consists of approximately 800 m of light- to brownish-gray, thin- to medium-bedded limestone, minor amounts of brownish-gray, calcareous siltstone and mudstone, and limestone conglomerate. An interval of brecciated and calcite-recemented basalt occurs near top of section, as does a volcanic breccia interval in lower part of the section. Fossils found yield a Norian age (Detterman and Reed, 1980; C.D. Blome, U.S. Geological Survey, oral commun., 1981). A 46-m-thick columnar-joinFveryAWWWWvesicularDWW W!W"WvicinitylWWvillageWvitrophyricDW!W"WvolcanicAWDW4WWWWWW WWWWWW!W"W%W&WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWcWnWoWpWqW WWW-W4WkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&W4W=W>W?W@WAWBWCWJWKWLWWWcWdWeWfWkWlWmWnWvWwWWWWWWWWWWWwaterbW!AAndesite, dacite, and leucobasalt lava flows, volcanic breccia, lahar deposits, and debris-flow deposits. Includes air-fall tuff, volcanic dome deposits, block-and-ash-flow deposits, ash-flow tuffs, volcanic-rubble flows, debris flows and hot-blast avalanche deposits. Lava flows and clasts in other volcanic deposits of unit are porphyritic, typically glassy, gray to black, and commonly vesicular. Andesite is overwhelmingly dominant composition and probably constitutes 60 percent or moreB of rocks. Unit typically forms volcanic edifices; it also forms isolated outcrops that cap ridges, providing a good example of topography reversal caused by erosion. Individual flows are locally as thick as 30 m and are laterally continuous over large areas. Unit also includes basaltic, basaltic andesite, and dacite parasitic cinder and spatter cones. Cones are commonly 30 to 300 m high, are steep sided, and have small crater at top. Rocks are highly scoriaceous to vitrophyric, rangiyx€AConsists of zeolite-bearing tuffaceous sandstone and basalt, and hard claystone, sandstone, tuff, and graded beds (wildflysch of Moore, 1969). The formation is sheared, faulted, and folded; the estimated thickness is 5,000 meters (Nilsen and Moore, 1981). All contacts with other units, other than intrusive contacts, are faults. "The formation is lithologically distinct, as it is a coherent belt of rocks that contains pillow basalt and tuff, which are not found in either the underlying oBr the overlying formations (Moore, 1969, p. A31)." Although no fossils were found, Moore (1969) suggested the Ghost Rocks straddled the Paleocene-Eocene boundary based on " analysis of the thickness of similar lithologies in the successive formations and a hypothetical correlation of the volcanic rocks in the Ghost Rocks Formation with nearby intrusive rocks of known age" Poorly preserved fossils reported by Plafker and others (1994) suggest a latest Cretaceous and Paleocene age for liyasAWDWiWdWhW4WWWWWWWWWWWWW!W"W%WascendingWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWsinHWbasinsMWNWbasisdWoWHWIWJW\WiWjWkWlWmWbaslathWbatholitheW@WCWDWGWbayZW`WbcdeRWbeAWSWbWkW@WRWoWpWqWbecauseAWTWd!Cvng in size from cinder-size fragments to 1-m-long bombs (Detterman and others, 1987b; T.P. Miller, oral commun., 1991)RCQvD QuaternaryEVolcanic rocks, undividedFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000."A401AAndesite, dacite, and leucobasalt lava flows, volcanic breccia, lahar deposits, and debris-flow deposits. Includes air-fall tuff, volcanic dome deposits, block-and-ash-flow deposits, ash-flow tuffs, volcanic-rubble flows, debris flows and hot-blast avalanche deposits. Lava flows and clasts in other volcanic deposits of unit are porphyritic, typically glassy, gray to black, and commonly vesicular. Andesite is overwhelmingly dominant composition and probably constitutes 60 percent or morebllessdWlesserWWleucobasaltDW!W"Wlevel WlightWlight-brownish-grayWWDWDWDWDWDWDWDWDWDWDWDWDWuWvWwWxWyWzW{W|W}W~WWleucobasaltDWDWDWDWDWDWDWDWltDWDWsaltDWWWWWWtDWaltDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWDWDWDWDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWtDWW#W$W%W&WXWlgaWWlgrWWliberty-W.WlightKWSW\WuWvWwWPWRWWWW W1W<WhWiWWWWWWWWWWlightandmedium-graytosilverygrayphylliteslatesiliceoVlightgraymassiveorthinlylaminatedquartziteandmediumVlighttodark-grayfinetomedium-grainedmassivetopoorly1V^;dikeAWdikesWdiorite W$WdipW W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W%W&WWWWWWWWWWWWWWWWWWWWWW,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,W,WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdisconformablyWWWdisconformitiesWdiscontinuousWWWWWW 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Vconsistsofameasuredthicknessofmorethan1200mofdarkVconsistsofmediumtothick-beddedgradedbedsequencesaverVconsistsofmedium-grayfinetomedium-grainedarkosicsandsVVacialdepositsattheouterlimitsoVconsistsofundividedglacialdepositsincludingendlateralVVconsistsofzeolite-bearingtuffaceoussandstoneandbasaltVconsiststypicallyofendandlateralmoraineofthenewhaleVconsiststypicallyofendandlateralmorainesofthesecondVVVrangingfromgranitetoquartzdiVuparasiticDW!W"WpartAWiWW4WWWWWWWWW#W&WparticularW4W4W4W4W4W4W4W4WW%W&W4W4W4W4W4W4W4W4W4W4W%W&W4W4W4WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWpartiallyWWiallyWW7W8W9WpebbleAWHWYWRWSWTWWWXWYW[WcWW WWWpebblesWJWpebblyAWMWNWYWaWWWpelecypodW7W8W9WpeliteWWpelitic@WWWWWpeninsulaWWW4Wpennsylvanian0WIconsolidatedAWconspicuousWconstituents4WconstitutedWconstitutesDW!W"WconstrainedWcontact4WWWW W 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had@.hauterivian@having@healy@herein@hills@however@hurst@|hypabyssal@in@|inches@includes@includesrocksinthehealymountmckinleyandtalkeetnaqua@includesthewrangelllavaconsistingchieflyofbasaltand@indecision@AConsists of thick pebble-cobble conglomerate in its uppermost and lowermost parts and contains sandstone and siltstone in its middle part. In measured section, conglomerate intervals are massive and have clasts that are a mixture of volcanic, granitic, and metamorphic rocks in subequal proportions. Sandstone and siltstone intervals of measured section vary from thin-bedded to massive and are typically dark- to medium-gray; they are fine- to medium-grained lower in section and become mediBum- to coarse-grained towards top. The more fine-grained clastic parts of formation contain considerable carbonaceous debris and minor coaly material. Age of the Copper Lake is not well constrained; sparse megaflora in type section in Iliamna area and abundant megaflora farther south on the Alaska Peninsula are restricted to sandstone and siltstone intervals present in middle part of unit (Detterman and others, 1996)CTcDearly Eocene and Paleocene(?)ECopper Lake Formation}reportedlW-WWWW WreportslWdWWrepresent4WrepresentedWrepresentsWWrespectWrestrictedWWWresult4WWWWblesWWWWWWWWWWWWWWWWWesWWWWWWblesWWWWWWlesWWWemblesWWWWWWWWWWWWWWWresetWWresettingWWWWWWWWWWWWWWWWresetWWresettingWWWWWWWWWWWWWWWWWWWWWW_WoWpWqWWWWW WWrockWTWXWYWZW`WeWhW WrocksAWGWHWMWNWWWZW[W\W^W_WbWcWdWgWhWlWoWuWvWwWxW{WW@WAWBWGWHWIWJWNWOWRWTWWW\W_W`WdWeWhWiWjWkWlWmWoWpWqWWWWWWWWW W W W WWnYonlydW4WWW&WorAWDW-WWWWWWW!W"WWWWWWWWWWWWWWWWWWWWWW-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWoWpWqWZWorangeIWWWorangelight-tanorlight-graymassive-beddedcoarseconglomIVorange-brownAWorange-weatheredWKbyAWDWdWW-WWWWWWWWW WWW W!W"W$WbyrneWcWWc-4Wc-5Wcalc-alkaline&Wcalc-arenaceousWcalcareousWWcalcite-recementedWcalled-WcallianassaWcallovianWWcampanianWcannotWcanyonWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWcalcareousBWHWIWJWQWSW]WbWcWWWWWWW W!W"W#W$W%W&W2W3W7W8W9W;WKWLWcWgWoWtWvWwWxWWWWWWWWWWWWcalcareousgraywackegritchert-argillite-claspebbleconglocVcalcite WhWiWcalcite-cementedW~DaeromagneticlWaffWaffinitiesWaffinity%W&W!W"W#W$W%W&WaffinitiesdWWaffinitydWpWuWafognak-W.WafterWag0WageAWHWKWPWVW[W^W_W`WbWcWdWfWkWoWuWvWwWWAWHWIWJWOWPWVW\W]W_W`WaWeWfWgWoWpWqWWWWWW W W W WWWWWWWWWWW W!W"W#W$W%W&W'W-W.W/W0W2W3W4W7W8W9W:W;WEWJWKWLWMWNWQWRWSWTWVWXW[W\W]W^W_WaWbWdWeWfWgWkWlWmWnWoWpWqWrWtWuWxWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWZ&liWlackWlacustrineCWlagWlagoonalWlaharDWFW!W"WlakeWWWWlaminaeWlaminatedAWlargeDWdW WW!W"W$Wlargemultiphasehornblendedioritequartzdioriteandtonal Vlarge-scaleWlargelyWWlargerWWWlarge-scale_WWge-scale_WWWWWWWW_WWscale_W_W_W_W_W_W_W_Wlarge-scale_W_W_W_W_W_W_W_W_W_W_W_W_We_W_W_W_W_W_W_W_W_Wcale_W_W_W_W_W_W_Wge-scale_W_W_W_W_W_W_W_W_Wcale_W_W_W_W_W_W_W_WW_W_Wq 1997 W W W W]W]W]WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW`chloritedWcinderDW!W"Wcinder-sizeDW!W"WcircleAWcirculationWcirquesWcitedWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&Wclose@WEWFW(W)W*W+W,WcloselyfWgWWW-W.WclusterskWcm[WcoalAWHWJWKWMWNWSWUWOWTW[Wcoal-bearingAWMWNWOWcoalescing5WcoarseAWIWXWYW_WWWWWWW W!W"W#W$W%W&WinAWDWiWlWdWhWW4WWWWWWWWWWWWWW W WWWWWWWWWW!W"W$W%W&WlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlW{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{W{Wm1975dWW1977-WdWdWdWdW5dWdW1975WWW1976WW6QW6QW6QW6QW6QW6QW6QW6QW6QW6QWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWBWCWUWXW1978AWPWVW[W^W_WbWiWjWmWuWvWwW@WQWUWWW`WWW-W.W2W3W5W=W>W?W@WAWBWCWGWHWIWQWRWSWTWUWVW_WgWyWzW{W|W}W~WWWWWWW1979cWpWqWdWeWfWtW1980^WhWiWjWlWmWoWuWvWwWxWWRWSWXWYWaWcW W WWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W0W6WbWdWeWfWhWiWkWlWmWnWpWtWuWyWzW{W|W}W~WWWWWWWWWWhettangian4WhighDW!W"Whigh-angleWhighlyDWMWWW W!W"Whill%W&WhomoclinallyWhorizons4WWhornblende WWhornfels$WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW{W|W}W~Whornblende`WhWiWjWnW@WEWFWGW WWWWWWWWW W!W"W#W$W%W&W0WDWFWUW[W\W]Whornblende-bearingUWhornblende-clinopyroDWFWhornblende-plagioclaEWFWhornblende-pyroxeneWWWWWW W!W"W#W$W%W&WhornblenditeWWhornfelsoWpWqWhostsqWhoweverRW[WgWkW@WOWeW WWWW0W4W6WZWbWdWeWfWhughes`WnWhurstaWhydrothermallyiWjWkWlWmWh A3190ssive to thick-bedded, medium- to coarse-grained, dark-green to gray volcanogenic sandstone containing abundant magnetite grains (Detterman and others, 1996). Interpreted to have been deposited in a deep- to shallowing water environment (Detterman and others, 1996). Megafauna are locally abundant in Shelikof, although, in general, formation is unfossiliferous. Vast majority of fossils collected from formation are ammonites of Callovian age; however, a few specimens suggest a BathonianB_(?) age for some rocks (Allaway and others, 1984, p. 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WW5W7W8W9WWWgeologicPWOWgeologyZWgeophysicalAWgeorgecWgilbertcWgivetianfWgWglacialCWglacier@WWJWglaucophaneRWSWTWVWglaucophane-bearingRWSWTWglennWW;Wgneiss@WEWFWgneissicAW#aboutdWW WaboveWW%WabsenceWabundance4Wabundant4WWWWWWWabundantlyWWWacceptedWWaccordingdWWWacilaWactive#WactuallyWaddWadditionWadvanceWWadvancesWW W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W WcentW W W W W W W W W W W W W W W W W W W W W WWW W WW W W W W W W W W WGWW W W W W W W W W W W W W2000lW204-W217 W270W3dWWW30DWWW!W"W300DW!W"W3000W30000W350W38odW4W40 W WWWkWW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW8kW346WWWW35WWW350WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW350WWWWW356WWWWWWWWWW6WWWWWWWWWWWWWWWWWWW*crossite-Wcrossite-epidote-We-W-W'-?coonradiWcopperWcoral WcorrelatedWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWTWcorrelativeAWSW@WUWWWWWWWWW-W.W/W5W6W=W>W?W@WAWBWCWaWWWWWWcorrespondingtWcorrespondseW/WGWHWIWQWYWZW[W\W]W^W_W`WcWdWeWfWcottacWtWWWcottonwood=W>W?W@WAWBWCWW<scattereddWschemeWschist-WW W WW-W-W-W-W-W-W-WWWWWW-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW~greenschist-Wt-W-W-WW&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&WWWWWWWWWWW W!W"W#W$W%W&WbWWWWWWWWWWWWW$colluvialCWcolumnar-jointedW%Wcolumnar-jointedbasaltflowsvolcanicbrecciaandagglomera%VcolusWcolyMWcommondWWWWcommonlyDW!W"WcommunDWWWWW!W"WcompensationWWWW-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWUfaultdWW W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW5tsAWtscAWtsuAWtuffDWdW4WWWW WW!W"W#WtuffaceousdW4WWtuffsDW!W"WturbiditeWWWturbidityWWWturonianWWWWWWWWWWWiticWWWWW`WWWrbiditic`WWWWWWWWWWWWWWWWWWWWWWWWWWWW`WWturbiditesW WturbiditicQWRW`WWWWWWWW`WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWwffWtwgfWtwoKWkWHWIWJWeWfWgWiWjWkWlWmW W WWWW5WEWdWeWfWgWvWwWWWWWWWWW%€AThin- to thick-bedded, intercalated fossiliferous gray siltstone, shale, sandstone, and conglomerate more than 1,400-m-thick (Csejtey and others, 1978). Originally named Naknek Series by Spurr (1900, p. 169-171, 179, 181) for exposures at Naknek Lake on the Alaska Peninsula. Megafossils, particularly the pelecypod Buchia (Detterman and Reed, 1980, p. B-38; J.W. Miller, written commun., 1982-88), are common, and the fauna, which also includes ammonites, indicates age range of Oxfordian toB late Tithonian. The Jurassic Alaska-Aleutian Range batholith was a major sediment source for the Naknek Formation; hence, uplift and erosion of the batholith occurred shortly after emplacement. The unit mapped here is probably correlative with the Indecision Creek and possibly Katolinat Conglomerate Members on the Alaska Peninsula (see Detterman and others, 1996) and therefore represents the upper part of the unit. Correlation has been suggested with the Root Glacier Formation of the WT€CUrangell Mountains, east of the map area (E.M. MacKevett, in Csejtey and others, 1978)1CJnD Late JurassicENaknek FormationF Wilson and others, 1998 (DOGmap)€-A3610AThinly layered and complexly folded quartz-mica schist, greenschist, crossite-epidote schist (blueschist), and epidote amphibolite (Connelly and Moore, 1979). Subdivided into two units by Roeske and others (1989, called the Raspberry Schist), the first consists of metabasite and metasedimentary rocks having some relict textures and phases preserved, including pillow shapes and bedding. The second unit is completely recrystallized and no original textures or phases are preserved. Carden Band others (1977) reported Jurassic K-Ar crossite metamorphic ages of 164.7 19.4 and 173.0 5.1 Ma and white mica ages of 192.2 5.6 and 196.7 5.8 Ma for the schist; Roeske and others (1989) reported a 204 8 Ma U-Pb isochron and a 195 10 Ma Rb-Sr isochron for the unitCJschDJurassic?thin-beddedAWdWWWWWWWWWthin-sectionsiWthinlydW-Wthinlylayeredandcomplexlyfoldedquartz-micaschistgreen-Vddedmediumtodark-graylocallycalcareousphyllit;V;Vlybeddedmediumtodark-graylocallycalcareousphyllit;V;V;V;V;V;V;V;V;V;V;V;V;V;V;V;VWWW W!W"W#W$W%W&W-W.W7W8W9W:WtholeiiticWWZWtholeiiticpillowbasaltpillowbrecciaandminoraquagenetZVthoseGWiWjWkWlWmWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~W WthoughWWWWWW W!W"W#W$W%W&Wthought@WEWFWPWWWWWW/W0WthreeMWNW W WWthroughgWdWWWWW(W)W*W+W,WthroughoutAWBW[WgWrWsWWWWWWW W!W"W#W$W%W&WthrustEWFWHWIWJWW W WWthrustingZWWti^WrmajorW4WWmajoritylWWmakesWWmakingWmanyWWmapAWMWiWWW%WmappabledWdWdWdWdWdWdWdWdWdWdWdWdWdWdWW-W-WWWWWWW-W-W-W-W-W-W-W-W-W-WWWmappableWWWWWWWWWWWWWWWWWWWWWWWWWWWWWmappableWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWuWvWwW}W~W@WGWHWIWJWOWRWTWXWYWbWcWeWfWgWiWjWkWlWmWnWoWpWqWWWWWW W W WWW4W:W<WJWKWLWOWPWbWgWjWkWlWmWnWtWuWvWwWWWWWWWWWWWWWWWWWWWWWWWWhealyAWhelminthoidaWhelminthopsisWhemipelagicWhemlockWhenceWhereiWWhereinWherendeenWWWWWWWWWWWWWherebWoW@WOWRWTWZWeWoWpWqWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWGsheardWshearedWshearingWshelfWshelikofWrdWdWardWdWWshearedWWWWWWWWWW'WWWWWWshearedmetamorphosedporphyriticquartzdioritecontainsbiVVsheenWWWWWWWpentinitetectonicallyintermixedwithchertandsheenWWWxDBsm and that they only contain rare thick-bedded (> 1 M) sandstone. In addition, Byrne (1981) noted the absence of conglomerate and pebbly mudstone, and igneous rocks and the relative lack of deformation, making this unit distinctive in the Ghost Rocks. By inference these rocks may be lithologically similar to the basin-plain facies association of Nilsen and Moore (1979) described for the Kodiak FormationCTghcDPaleocene and Late Cretaceous?E1Ghost Rocks Formation, coherent sedimentary rocksFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A961*reversalDW!W"WrevisedWrhythmicallydWWricciWrichWWrichlyWridgesDWFW!W"Wrip-upW-W-W-W-W-W-W-W-WW-W-WW-W-W-WWWW-WWWWWWWWWW-WWWWWWW-WWWWWWYWZW[W_WoWpWqWWWWW WW-WWWWWWrobinsonWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWnsonWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWrobinsonWWWWWWWWWWWWWWWWWWWWWWWWrobinsonWWWWWWWWWWWWWWewhereasAWWwhetherWwhichAWWWWWWW W WwhitedW-WasmassivelVVVVVVVVVVVVVVVVVVVVVVVlVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVwhite-weatheredWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWheredWWWWWWWW$W%W&WwidelyLW_WkWlWrWsWtW{WRWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W~WWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W=W>W?W@WAWBWCWwidelydistributedandexposedgraniticintrusiverockschie{Vwidelydistributedbiotite-muscovitegranitetoquartzmonzolVIK`BConsists typically of end and lateral moraine of the Newhalen advance, the second youngest of the four advance Brooks Lake Glaciation of generally accepted late Wisconsin age (Detterman and others (1987b)CQblnD PleistoceneE/Drift, Newhalen advance, Brooks Lake GlaciationFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A138A9Consists typically of end and lateral moraines of the second oldest of the four advance Brooks Lake Glaciation. This advance was significantly more extensive than younger advances and tends to have well-developed morainal features. Is generally accepted to be of late Wisconsin age (Detterman and others (1987b)9CQblilD PleistoceneE.Drift, Iliamna advance, Brooks Lake GlaciationJvolcanic-rubbleDW!W"WvolcaniclasticWvolcanogenicWWWWWWWWWWWWkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW!widelydWwildflyschW&W&W&W&W&WW&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&WwidelydistributedandexposedgraniticintrusiverockschieVVVVVwidelydistributedbiotite-muscovitegranitetoquartzmonzoVVVVtzmonzolVVVVVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVolVnzolVolVolVtzmonzolVolVolVolVolVolVolV?jWWWjaplWWjoint&WjschW WWWWWWWWWWWWWWWWWWWWWWWEMquartzlWW 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WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW%dobsonlWdoesWmultiply-deformedmetasedimentaryanddobsonlWnlWobsonlWnlWobsonlWnlWlWlWlWlWlWWWqWdolomiticWWWWWWWdmbWdmfWdmsWdooWpWqWdolomiticWWWWWWWWWe-magdolomiticWWWWWWWWWWWWWWWWWWWWWWWWWWWiticWWWWWWWWWWWWWWWWWWWWWWWWfWpWvWwWdominantlybasaltgreenstonegabbrodiabaseandchertminorVVdominantlydarkgraytypicallyphylliticsiliceoustocarbonvVwVdominantlyfinetomedium-grainedgarnet-bearingschistandGVdominantlymediumtomedium-dark-graygarnetiferousquartz-mAVdominantlymedium-darktodark-graythin-bandedbeddedradiodVeVfVdominantlymetabasaltslateandotherlow-grademetasedimentGVHVIVp1981lWWWWWW1982-88W1983AWlWW1983-85W1984WW1985W1987aW1987bDWWWWWWW!W"W1988W1989-W 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WWWwest`WWwesternWWWkWlWlWlWlWlWWWkWlWlWlWlWkWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWnWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWnWWWWWWWWWWWWWWWWdworkdWWwrangellWwrittenWWWyakatagaWyakutatWyellowWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWyanertWWWWWWWWWWWWWWWWWWWWWWWWWWyanertWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWyieldsRWSWTWyoungdWWWrWsWtWuWvWwWxWyWzW{W|W}W~WXWyoungereWyoungest@WGWyukon`Wyukon-koyukukUWyukon-tananaAWzircon@W0WzoneeWdWWWWWWWW W!W"W#W$W%W&W:WtwodW-WWWW Wtwo-micalWtypeWWWWtypesectionconsistsof624moffinetocoarse-grainedligVWWWWWWWWWWWWWWtwomapunitsofbundtzenandothers1997aineasternmcgratVVVVVVVVVVVVVVVVVVVVVtwomembersonelargelyvolcaniconelargelysedimentaryvolVVtwo-holedWWWWWWWWW~ygranitelWWWgraniticiWlWWWWWgranodioritelW$Wgravel W WWgravityWW~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~W~WgrantzbWbWgranules_W_W_W_Wules_W_W_W_W_Wnules_WWWWWWWWWWWWWWWWW_W_W_W_W_W_W_W_W_W_W_WggrantzbWgranular}WgranuleHWSWWgranules_W_W_W_W_W_W_W_W_W_W_W_W_W_W_W_W_W_W_W_Wes_W_WWWgranuliteWWWWWWWWWWWWWWWWWWCu+otherDWdWWW W!W"WlWlWlWlWWWWWWWlWlWlWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWnWWWWWWWWWWWWWWWWWWWWWWWNWPWQWSWTWVWZW[W\W]W^W_W`WbWcWdWeWfWgWiWjWlWmWoWpWqWuWvWwWxW}WW@WAWBWEWFWGWHWIWJWKWLWMWNWOWQWRWSWTWUWWWXWYW_W`WaWcWeWfWgWhWWWWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W-W.W/W0W5W6W7W8W9W:W;W<W=W>W?W@WAWBWCWEWGWHWIWKWLWMWNWOWPWQWRWSWTWUWVWWWXWYWZW[W\W]W_WaWbWcWdWeWfWhWiWkWlWmWnWoWpWrWtWuWxWyWzW{W|W}W~W$R%AColumnar-jointed basalt flows, volcanic breccia, and agglomerate. Chemical data (Hill, 1979; Wilson and Shew, 1992) indicate these rocks are of tholeiitic affinity. Interbedded with Late Triassic Kamishak Formation (Trk). Potassium-argon age determination on flow(?) unit was 197 +/- 12 Ma (Wilson and Shew, 1992 see note in the Kamishak map unit description above); age is thought to be minimum age, as it is younger than stratigraphic position suggestsCTrvD Late TriassicEVolcanic rocksFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.&A58101batholithiWlWWWbathonianWbayiWlWWWWW W&WbaysiWbeAWiWWWWW%Wbeach Wbeaches WW-W-W-WW-W-W-W-W-W-W-W-W-WWWWW-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-WbearingWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWbeaverWWWWWWW#prepCWiWlWdWhW-WWWWWWWWWWWWW WpressDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WrDWFWMWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WreconnaissanceCWiWlWdWhW-WWWWWWWWWWWWW WsCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W'W'WWWWWWWWWWWWscientificCWiWlWdWhW-WWWWWWWWWWWWW Wsim-xxxxCWiWlWdWhW-WWWWWWWWWWWWW WzWdark-grayAW4WWWWdark-greenW&Wdark-yellowish-brownWWWWWWWWWWWWWWW`WaWeWWWW W WWWkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdaydWdebrisDWWWW!W"Wdebris-flowDW!W"WdeciduousWdeepWWdeep-marineWdeep-seadWdefinite&WdeformationdWWW W W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdeformation9W9W9W9W9W9W9W9W9WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWTbasaltFWWWWW%WbasalticDW!W"WbaseWWWWWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWlWlWWWWWbasalticandesiticandrhyoliticflowstuffandbrecciaandVVVVVVVVVVVVVVVVqVVqVVqVpVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVticandesiticandrhyoliticflowstuffandbrecciaandpVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVVqVqVandesiticandrhyoliticflowstuffandbrecciaandpVqVVVqVqVVViaandpVqVVqVVqVVqVK<AComposed primarily of fluvial sandstone and conglomerate that contains interbeds of siltstone, shale, and coal. Chert, quartz, and granitic and metasedimentary rocks form most of clasts in conglomerate; volcanic rocks are small, but significant, proportion of clasts. Minor tuff is present; however, erosion of underlying Mesozoic rocks is probably main source for Hemlock Conglomerate (Detterman and others (1987a). Megaflora of broadleaf deciduous plant and evergreen needle fossils suggesBWt late Oligocene age (J.A. Wolfe, written commun., 1988, in Detterman and others, 1996)ECThDlate OligoceneEHemlock ConglomerateFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A850Gthintothick-beddedintercalatedfossiliferousgraysiltstoVthintothick-beddedwell-induratedconglomeratecontainingVthin-bandedeWeWnduratedconglomeratecontainingVthin-bandeddWeWeWfWyJ`pillow-WWWW WpilloweddWplaced4WWplaces WplafkerWWWWWWWWWWWWWcWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW*rocksAWDWGWHWMWNWWWZW[W\W^W_WbWcWdWgWhWlWoWuWvWwWxW{WW@WAWBWGWHWIWJWNWOWRWTWWW\W_W`WdWeWhWiWjWkWlWmWoWpWqWWWWWWWWW W W W WWWWWWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W-W.W/W0W2W3W4W5W7W8W9W:W<W=W>W?W@WAWBWCWDWFWGWHWIWJWKWLWNWQWRWSWTWUWVWWWXWYWZW[W\W]W_W`WaWbWcWdWeWfWkWlWmWnWtWvWwWxWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW.areDWiWlWdWhWW-W4WWWWWWWWWWWWWWWWWWWWWWW W!W"W%W&WWWWWWWWWWWWWWWlWWWWWWWWWWWWkWlWWWWWWWWWWWWWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWW W!W"W#W$W%W&W0W6W:W;WKWLWQWRWSWTWZWaWgWqWtWuWWWWWWWWWWWWWOWn7goriginallyWWWWoriginallydescribedaslimestonerocksofformationareactVWenesisWWWWWWorthoclaseWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWAMassive sandstone beds and lesser amounts of argillite and medium- to thin-bedded sandstone. Sandstone beds show Bouma sequences indicative of deposition be turbidity currents. Locally, channelized conglomerate units up to 100-m-thick occur on the Aliulik Peninsula. Clasts in the conglomerate are up to 30 cm in size and consist of chert, sandstone, limestone, and greenstone. Andesite is also interbedded on the Aiulik Peninsula CTghsD Paleocene?E5Ghost Rocks Formation, sandstone-rich unit, undividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A962"quadranglequadranglesWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWAvariouslydWvaryWvaryingdWvastWveinWvariouslydWvaryingdWdWdWgdWdWdWWwWxWWWWxWWxWWxWWxWWxWWxWWxWWxWWxWWxWWxWvergenceJWJWJWaryingMWNWveleskapWqWuWvWwWxWvergenceHWIWJWJWJWWIWJWJWJWHWIWJWJW{toutcropsDWW!W"WouterWWWoutwashWWoverDWW!W"WoverallWWWoverlieW WoverliesAWW Woverlying4WWWWWoverwhelminglyDW!W"WoxfordianWpDWdWWWWWWWWW!W"WpacificW W$Wpale-brownWpale-yellowish-brownWWWWWWWWWWWWWWWWWWWWxWxWxWxWxWxWxWxWxWxWxWTWxWxWxWxWxWxWxWxWxWxWTWxWxWxWxWxWxWxWxWxWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWpWpaige4WpaleoWpWqWpale-olive^WpaleoceneAWVW[WdWOWpaleodictyonRWpaleozoicEWFWeWWWWWWW W!W"W#W$W%W&W-W.WWWWpalynflora_WdWeWfWsCthe unit is repeated structurally by folding and faulting, which makes internal stratigraphic correlation difficult. Nilsen and Moore (1979) used a turbidite facies and facies association scheme that generally followed the system of Mutti and Ricci Lucchi (1972, 1975, cited in Nilsen and Moore, 1979) and Nelson and Nilsen (1974, cited in Nilsen and Moore, 1979); under this system the Kodiak formation consists largely of the basin-plain and slope-facies associations. The basin-plain facieDs is the structurally lowest part of the Kodiak and is characteristic of most of it on the southeast side of Kodiak Island (Nilsen and Moore, 1979). It "* * * consists of repetitively interstratified graded sandstone beds and hemipelagic shales, typically 30 cm thick, * * * Sandstone:shale ratios range in general from 1:1 to 1:5. The interstratified hemipelagic shale is generally bioturbated; trace fossils typically are those of the surface-grazing deep-marine Nereites facies and includeconsistsofthickpebble-cobbleconglomerateinitsuppermosVconsistsoftwomembersasedimentaryunitinfaultcontactV VconsistsofundividedglacialdepositsattheouterlimitsoVconsistsofundividedglacialdepositsincludingendlateralVVconsistsofzeolite-bearingtuffaceoussandstoneandbasaltVconsiststypicallyofendandlateralmoraineofthenewhaleVconsiststypicallyofendandlateralmorainesofthesecondV@splagioclasehWplains WplankticWplanktonicWplantWWplatyWpliensbachian4WYCVnditions. Fossils are uncommon in unit although carbonaceous debris is common locally2CJnnD OxfordianE2Naknek Formation, Northeast Creek Sandstone MemberFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A3016A.Limited to northern half of Alaska Peninsula, consists of massive to thick-bedded conglomerate and interbedded, crossbedded, clean quartzose sandstone. Clasts as large as 2 m. Clast composition is mainly granitic rocks, and up to 20 percent metamorphic and volcanic rocks (Detterman and others, 1996).CJncD Late JurassicE,Naknek Formation, Chisik Conglomerate MemberFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A3020<WFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A3014AConsists of medium-gray, fine- to medium-grained arkosic sandstone and siltstone (Detterman and others, 1996). It is thin-bedded to massive; where bedded, it is locally crossbedded. Fresh biotite and hornblende are minor, but important, components of sandstone, as they are interpreted to indicate first-cycle erosion from the Alaska-Aleutian Range batholith. Indecision Creek Sandstone Member is abundantly fossiliferous; however, fossils are restricted almost exclusively to pelecypods of Bthe genus BuchiaCJniDTithonian and KimmeridgianE3Naknek Formation, Indecision Creek Sandstone MemberFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A3013eunknowndW&WunlikeWunpublishediWunusuallyWupWWWup-sectionWupliftWuponWupperW4WWWWWWWWupper-fanWuppermostWWursusWlWWWkWlWWWWWlWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWuppermemberdominantlythin-beddedveryfine-grainedspicul3V3V3V3V3V3V3V3V3V3Vspicul2V3V3V3V3VV3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3V3VC @ P0 AAP0 AAggeologicCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WgeologicalCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W'W'WPindecisionWWindeterminateWindicateWWWW WWW%WindicatedWWindicatesdWWWindicatingWindicationWindicativeWindictedWindividualDW!W"WinduratedAWMWinferenceWinferredlWW WinfluenceWinformalWinner-fanW]WW$W%W&W4WWWWinformal[W\W]W]W]W]W]W]W]W]WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWRconesDWW!W"WconformWconformable4WWconglomerateAWMWWWWWWWWWWWWWWWWWWconglomerateandcross-beddedsandstoneandsiltstonecontaiVconglomerate-sandstoWconglomeraticWWconnellydWhW-WWWW W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW8 f&AMassive, dark-green to black volcanic breccia, agglomerate, and andesitic flows (Hanson, 1957; Hill, 1979). These rocks are only exposed on offshore islets east of Puale Bay. Well-developed joint system has obscured original structure, and because of this, in part, thickness is unknown. No definite age control exists; however, these rocks appear to structurally underlie mid-Permian limestone (Pls). Hill (1979) briefly examined exposures and sampled rocks. Limited chemical data from HiBll (1979) suggest these volcanic rocks are of calc-alkaline affinity, in contrast to Late Triassic tholeiitic volcanic rocks of nearby mainland (Trv)CPvD Permian(?)EVolcanic rocksFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.'A100A500AIncludes a number of different units mapped in various areas throughout the map area: In the Healy quadrangle, unit Ts (Csejtey and others, 1992) consists of a sequence of poorly consolidated fluviatile dark-gray shale, yellowish-gray sandstone, siltstone, and pebble conglomerate of possible Eocene to Miocene age that may be in part correlative with the Tertiary coal-bearing sequence (unit Tcb). In the Mount Hayes quadrangle, units Ts and Tsc of (Nokleberg and others, 1992a), consisti€-ESchist of Kodiak IslandFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.€4A3250ALower part composed of dark-gray tuffaceous limestone, tuff, and dark siliceous shale. Upper part thin to massive tuffaceous gray sandstone with minor siltstone and shale interbeds (Detterman and others, 1996). Age of unit, Early Jurassic (Hettangian and early Sinemurian), is based on abundant megafauna; however, this megafauna is present in great abundance in only a few horizons and may represent mass kills as a result of volcanic eruptions (Detterman and others, 1996). Contact of Talkfault-boundedhWfaultedWfaultingWfaultsdWWfaunaWWWWWfeaturesWfewAWiW4WWWWWWficusWfillWfineAWWW WWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWfinetocoarse-grainedgranitequartzmonzonitegranodioriteVVVVVVVVVVseparatediWW WsequenceAW4WWWsequencesdWWWWWseriesWserpentinizationdWhWhWhWWWhWhWhWhWserpentinizedWntinizedWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWoritemetabasiteandserpentinizedWhWWWWWWWWWWWWWWWWaWaWaWaWserpentinizedperidotiteduniteandharzburgitehavingassocUVUVUVUVUVUVUVUVUVUVassocUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUVUV9W;W<WOWshallow[WQWSWTWbW4WshallowwatermarinesequenceofthinlybeddedcalcareoussabVshallow-marineeWWWWwmcgrathAWlWlWmchugh-W-W-Whugh-W-W-W-W-WmckinleyWWWWWWWWWWWWWWwWWwWWwWWwWWwWWwWWwWWwWWwWWwWWwWmclWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWHWnW}WGWPWSW_WfWgWWWWWWWWWWWWWWW W!W"W#W$W%W&W1Wmedium-grayKW\WaWRW]W_WWWWWWWW7W8W9Wmedium-lightWWWmedium-olive-grayPWmedium-scale_WmegafossilsfWgWWmelangeWdWeWfWgWW-W.WmelozitnabWuWvWwWVW`WnWrWsWtWuWvWwWxWyWzW{W|W}W~WmemberKW2W3WmembersKWMWNWWmeta-andesiteHWIWJWmeta-areniteWW1|light-colored@lignitic@lithologically@localities@lower@m@magnitude@major@mapped@rmargins@s@ed@apped@magmatic@main@major@mapped@claren@magmatic@main@major@mapped@eensto@main@major@mapped@mapped@apped@mapped@pped@aklyfoliatedgreensto@main@major@mapped@onlyinreconnaissancebutpresumedtoconsistofsom@{{inafaultboundedexposureatbroadpassjusts@{{afaultboundedexposureatbroadpassjusts@{WKAType section consists of 624 m of fine- to coarse-grained, light-brownish-gray arkosic sandstone and minor amounts of olive-gray to dark-gray, thin-bedded siltstone in lower part of section (Detterman and others, 1996). Sandstone is typically thick-bedded and crossbedded and contains magnetite laminae and thin beds of conglomerate. Depositional environment is mainly nonmarine. Some sand beds are channeled with lag gravel at bases of channels. Crossbedding is mostly high-angle and variaBble directional eolian type, some is small-scale, tabular crossbedding with clay drapes characteristic of point bar deposits. Lower contact is conformable on underlying Chisik Conglomerate Member and is placed where thick sandstone replaces conglomerate in section. Upper contact is sharp and conformable with overlying Snug Harbor Siltstone Member. At this contact, depositional environment shifts from mainly nonmarine to marine; position of contact varies temporally depending on local cobulateAWW4WWWWWWWWWWW W%W&WlateralWWWWWWWWWWWWWW W WWWW%W&W4WkWlWWWWWWWWWWWWWWWWW W WWWW%W&W4WkWlWWWWW W WWWW%W&W4WkWlWWWWWWWWWWWWWWWWW W WWWW%W&W4WkWlWWWWWWWWWWWWWWWWWWWlaterWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWl/hasW WW&WhauterivianWWWWWWWWWWWWWWWWWWWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWhasenWWWhasenWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW%andAWCWDWFWMWiWlWdWhWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdome@%dunite@(e@|edifices@ emplacement@erosion@exposures@extrusive@fault@fault-bounded@Ufine-grained@first@mflysch@formation@k!tion@!formation@!ne-grained@first@flysch@formation@!!onatesandstoneandconglo@finely@histosesedimentaryrocksofunithgsofthe@fine-grainedschistosesedimentaryrocksofunithgsofthe@dippingMWdWdipsWdirectiondWdirectionalWdisarticulatedWdisconformity4WdisorderedWdisplaysWW&W&W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'W'WW%W&W'W'W'WdishnaaWishnaaWaWaWdismemberedUWUWUWUWWUWWWreteWdiscussedWWdishnaaWdismemberedUWWWWUWWWWWUWWWjpre-middleAWeAWeAWeAWdleAWeAWeAWeAWAWeAWeAWpre-ordovicianWWianWWWWWWaryVWpreacherWprecambrianWpreciselyWWpredominanceWpredominantcWWWpredominantlyUWSWWW7W8W9WWWWWWWWpredominantlyfluviatileandalluvialcarbonaceousmudstoneUVpredominantlyveryfinetomedium-grainedmediumtomedium-dSVpredominatecWprefer_WpreferredTWprehniteVWprehnite-pumpellyiteWW Wpresence_W WWpresentkWOWRW[WeWfWgW2W3WJWVWWWWpreservedWWWWUWhWiWWWWWWWWWWWpressDWEWKWLWMWNWWWWWWW W!W"W#W$W%W&W0WtWuWWWWWWWWWWWWWWWWWWWWWpresumablypWpresumedWWjWpreviousWWq-chickaloonAWchioneWchisikWnAWnAWchieflyieflychieflyieflyeflyeflyeflyjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWjWWjW`WiWjWWjWiWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWWjWjWjWjWjWjWWjWWjWWjWWjWWjWWjWjWjWjWjWc theWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWZlaterallyDW!W"WlatestWWlavaDWFWW!W"W#WlavasWlayeredhW-WlayersAWdWWWWleastWleavesWlensesWW W W W W W W W W W W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWlddWldlWWWWWWWWWatheAWiWlWdWhWW-WWWWWWWWWWWWWW W W WWWWWWWWW W%W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1W1WsteepDW!W"WsteeplyMWdWWstocks$WstraddledWstrataWWstratified WstratigraphicdWW%WstrikesWstrongWWW`W`WWWWWWphically[W`WWW`WW`W`W`W`W`W`W`W`W`W`W`W`WW`W`W`Wally[W`W`W`W`W`W`W`W`W`W`W`W`W`W`W`Wy[W`W`W`W`W`W`Wy[W`W`WOWOWOWOW`WOWOWOWOWOWlly[W`WOWOWOWWWWWWWWWWOWWWWWWWWWWWWWWWWWM{SusedMWWuyakdWhWWW WvWvaldezWvariableWWWgs W W W W W W W W W W W W W W W WusingXWXWXWWWWWWWWWWWW)W*W+W,WvalanginianaW W W WvaldezWW^WiWjWkWWQWcWWWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W-W.W0WWWWWWWWWWWWWWWWWWvalley(W)W*W+W,WvalueuWvariableWvariablyEWFWiWjWkWlWmWWWWWWWWWWWWvariablymetamorphosedbutlargelylowergreenschistfaciesVVVVVVVVVVvaricoloredoWvariesOW4WWvarietycWgWWWWvariousAWOWSWWWZWdWWWWWWW W!W"W#W$W%W&W5WjWWWWWWvariousvariously@Fvery@volcanic-rubble@w@weak@well@3wheeler@whereas@widely@wilson@with@within@work@4yellowish-gray@000y@00000e@4yellowish-gray@zone@0e@00000@youngest@zoned@000@0thoutwm@4yellow@youngest@zoned@0OhCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWAOlive-gray to green, medium-bedded, fine- to medium-grained graywacke, mudstone, siltstone, and shale; local lenses of volcanic pebble conglomerate (Detterman and others, 1996). Shallow-water deposits of Kialagvik Formation are abundantly fossiliferous; most megafauna indicate age of early and middle Bajocian, although overall age range of fossils collected from unit is late Toarcian to Callovian (Imlay, 1984; see also, Detterman and others, 1996)CJkDMiddle and Early JurassicEKialagvik FormationFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000.A4020T=€4Beetna with underlying Kamishak Formation is conformable and gradational; it is arbitrarily placed where clastic sedimentary rocks replace limestone as major constituents of rock sequence. Contact of Talkeetna with overlying Kialagvik Formation is structurally conformable; however, it is considered a disconformity, as rocks of late Sinemurian, Pliensbachian, and most of Toarcian Stages are missing~CJtDEarly Jurassic, Late Triassic?ETalkeetna FormationFWilson and others, 1998 (apmap)!MbiotiteiWlWWbioturbatedWWWblackDW!W"W&WWWWWlWWWkWlWWWWkWlWWWWWWkWlWWWWWW[WblackDW_WeWWWW WWkWlWWWWWWW[WblackDW_WeWWWW WWkWlWWWWkWlWWWWWkWlWWWWkWlWWWWWlWWWWWWkWlWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWblastomylonitesWWWWWzW|WW@WWWWWW1W4WEWkWlWmWnWtWuWWWWbodyeWWWWWWW W!W"W#W$W%W&WbordereWkWWWWWWWW W!W"W#W$W%W&W-W.WWWWWWWWWWWboss-W.WbothMWNW[W^WeW W7W8W9WuWuincludesAWDWMWdWWWW!W"WincludesanumberofdifferentunitsmappedinvariousareasAVsAVsAVsAVsAVsAVsAVsAVsAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVAVVVVVVVVVVVincludesawidevarietyofgraniticrocksexposedthroughoutVVVVVVVVVVVVVVVtgVincludesjurassicphaseofthealaska-aleutianrangebatholi,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,V,VV,VVIsoutheastiWdWWWW#WsouthernWsouthwestWW&W&W&W&W&W&W&W&WWWWWWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W0W4W5W7W8W9WgWsouthwest@W W WWWWW-W.W5WJWKWLWsouthwesternyWzWRWiWjWkWlWmWNWdWeWfWgWspeW W2W3W:WspanneddWsparite;WsparseAW[WWDWFWWsparsetolocallyabundantandesiteandsubordinatedaciteaVsparselyiWjWkWlWmWWspfWsphene@WspiculesWWspiculite2W3W6Wspiculitic2W3WspiliticVWWWspongeWWsppWspruceWWWWWspurWWspurious[W\W]WspurrWsq7W8W9Wsqd0Wsqm0WsshWstjWrWWp.1978AWdWhWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWdWeWfWtWW1980^WhWiWjWlWmWoWuWvWwWxWWRWSWXWYWaWcW W WWWWWWWWWW W!W"W#W$W%W&W(W)W*W+W,W0W6WbWdWeWfWhWiWkWlWmWnWpWtWuWyWzW{W|W}W~WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWCted basalt flow or sill from upper part of section has yielded a potassium-argon age of 197? 12 Ma (Wilson and Shew, 1992); however, it remains to be determined whether the basalt sill is related to the overlying Early Jurassic and Late Triassic(?) Talkeetna Formation or, alternatively, is a flow from the volcanic rocks interbedded with the Kamishak that yields an analytically "minimum" agegCTrkD Late TriassicEKamishak FormationFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000. A5730"betweeniWlWW W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWbidyWyWyWyWyWbidyWyWyWyWbidyWyWyWyWyWyWyWyWyWyWyW*poorlyAWCWdWW WW W'Wrtedfinetocoarse-grainedgraywackesandstonegriYVYVYVYVYVYVsortedfinetocoarse-grainedgraywackesandstonegriXVYVVVVVYVYVYVYVYVYVYVYVYVsortedfinetocoarse-grainedgraywackesandstonegriXVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVYVr` chertchert-richWWWWWchert-bearingWWWWWWWWWWWWWschert-bearingWWWWWWdotherassocichert-argillite-clascWchert-bearingWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWqchaoticdWchaoticallyWcharacteriWcharacteristicWWcharacterizedWchemicalW%W&WchertdWWWWW W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-WW&W-W-W-WW&W-W-W-W-W-W-W-W-W-W-W-W-W-W-WW&W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W7W7W7W7W-W5W6W7W7W7W7W7W7W7W7W7W7W7W7W7W7W7W7WW7W7W7W7WW6W7W7W7W7W7W7W7W7W7W7W7W7W7W7W7W7W7W5W6W7W7W7W7W7W6W7W7W7W7W7W7W7W7W7W7W7W7W7WHAConsists of medium- to thick-bedded graded bed sequences, averaging 1-m-thick, of arkosic wacke and shale having occasional beds of pebbly conglomerate. Flute casts and complete Bouma sequences indicate deposition by turbidity currents below wave base. Strikes NE and dips steeply NW, generally deformed in tight large-scale folds. Moore (1969) designated the type section as the rocks exposed along the west shore of Uyak Bay. The base of the section is 4 km south of the head of the Bay wBhere the lower part of the formation is intruded by a pluton; the top of the section is 3 km south of the village of Uyak, where rocks of the Uyak Complex are thrust over the Kodiak Formation. As a result, neither a true lower or upper contact is known for the Kodiak Formation. Subsequent work by Nilsen and Moore (1979) indicated that the unit is approximately 5,000-m-thick, in contrast to the estimate of 30,000 m originally suggested by Moore (1969). Nilsen and Moore (1979) found that &siltstoneAWW4WWWWWWWWWWWWWWWsiltstonedepositedincool-temperatureclimacticconditionsVsiltstone-coalWsiltyWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW`WeW WWWWWWW W!W"W#W$W%W&W-W.W6W=W>W?W@WAWBWCWNWWW_WbWdWeWfWkWlWmWnWWWWWWWWWWWWWWWWWWWsimilarities;WsimilarityWsinemurianKWLWsingledW-W.WsischuoWuWvWwWsizePW_WskolaiWWWWWWWWWWWWWWWWWWW#>talkeetnaAW4WWtanAW WtaxaWWWlWlWtananaWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWVWWWXWYW`WvWwWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWofWWWWWWWWWWWWWWW W WWWWWWWWWWWWWWWWWW W!W"W#W%W&Woffshore&WolderWWoldestWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW/meandWmeasuredWWWmediumWWWWW$Wmediumtocoarse-grainedequigranulargranodioritetoquartz$Vmedium-beddedWWWWWWWWWWWWWWWWWWWWWWWWWdium-dark-grayAWPWSW_WhWiWmedium-dark-olive-grSWmedium-grainedHWnW}WGWPWSW_WfWgWWWWWWWWWWWWWWW W!W"W#W$W%W&W1WMWgWmedium-grayKW\WaWRW]W_WWWWWWWW7W8W9W;WMWgWmedium-lightWWWmedium-light-gray;Wmedium-olive-grayPWmedium-scale_WmegafossilsfWgWWmelangeWdWeWfWgWW-W.WmelozitnabWuWvWwWVW`WnWrWsWtWuWvWwWxWyWzW{W|W}W~WUWVW_WmemberKW2W3WmembersKWMWNWWmertiegWmeta-andesiteHWIWJWmeta-areniteWWmeta-graywacke`Wr€C=mestone blocks associated with pillow basalt within this unitCTghDPaleocene and Late Cretaceous?E Ghost Rocks Formation, undividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A960AUnit B of Byrne (1981), these rocks are exposed in the vicinity of Jap Bay. They consist "* * * of medium-bedded (10-40 cm thick beds) sandstone interbedded with similar thicknesses of shale. The sandstones and shales are rhythmically bedded and sole markings and graded beds indicate turbidite deposition." (Byrne, 1981, p. 42). Byrne (1981) interpreted these rocks as "slope basin sequences" and indicted they were distinctive in the Ghost Rocks because of their lack of contact metamorphi@UpetrographicallydWpetroliferousWphases-WWphyllosilicatesdWdWdWlicatesdWdWdWicatesdWdWdWilicatesdWdWilicatesdWdWcatesdWdWdWdWdWdWWWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWdphylliticOWOWOWOWOWhylliticOWOWOWOWWWWWWWWWWWWWWWWWWWWWWWWWWWWWphyllite-hostedWWphylliticOWvWwWWWWWwWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWphyllonitesWonitesWWWWWWWWWWWWWWWWWWWWWWWphysiographicallyWWWWWWWW;)daciteDW!W"Wdark4WW&W&W&W&W&W&W&WW%W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&WWW%W&W&WW&W&W&W&W&WWWWWWW%W&WWWWWWWWWWWWWW%W&WWW&WWWWoWpWqWdarkaWRWUW[WoWpWqWW%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&WWWWWWWWWdarkgreenishveryfine-grainedchertytuffgradingintogrebVbVbVbVbVbVbVVbVbVbVbVebVbVbVbVbVbVbVbVbVbVbVbVbVbVbVbVbVbVbVbVgreenishveryfine-grainedchertytuffgradingintogrebVbVbVbVbVbVbVbVbVbVbVbVbVbVeWfWkWlWmWnWxWyWzW{W|W}W~WWuG 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W!W"WgraywackeAWWWWgreat4WgreenWWWWWWWWWWWWWWWWgraywackeshalegritandconglomeratelowerpartconsistsofTVTVTVTVTVTVTVVVVVVywackeshalegritandconglomeratelowerpartconsistsofTVTVTVistsofTVTVTVTVTVTVsistsofTVTVTVTVTVTVTVTVTVTVTVTVstsofTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVTVywackeshalegritandconglomeratelowerpartconsistsofTVTVTVTVTVTVTVTVTVTVsistsofTVTVTVTVTVTVTVTVTVTVVthirddWWthisMWiWlW4WWWWWWWW WWW&WtholeiiticW W%W&WtholeiiticbasaltoccurringwithinbothsandstoneandargillVthoseWthought%WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWughWWWWWW W!W"W#W$W%W&Wthought@WEWFWPWWWWWW/W0WthousandKWLWthousands=W>W?W@WAWBWCWthreeMWNW W WWkWthroughgWdWWWWW(W)W*W+W,WRWSWTWthroughoutAWBW[WgWrWsWWWWWWW W!W"W#W$W%W&WthrustEWFWHWIWJWW W 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craterDW!W"WcreekWWcretaceousdWWWWWcross-beddedWcrossbeddedWWWcrossbeddingWWWWropseWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWseWWWWWWWWWWWWWWWWWWWWWWWseWWWWWWcropseWWWWWWWWeWWWWWWWWWWWWWWW37wheelerdWwhenWwhere4WWWWmcgrathquadranglebundtzenandotlVlVlVlVotkVlVlVlVlVlVlVlVVlVlVlVnVnVnVnVnVnV lYgreenstonedWW WgroundWWgroupWguadalupian WgulfWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWeandtufffirstdescribedbypaigeandknopf19074VgrgrlWgritOWTWUWXWYW]W^W_WcWdWeWfWgWWgrittyUWWW`WWWWWWWWWWgroupDWEWHWkWxWBWKWLWQWRWSWTWiWjWkWlWmWWW WWWWXWYW`WbWgWWWWWWWWWWWWWWWWWWWgroupingpWgrrmyWzW{W|W}W~WgrubstakeMWNWgulchEWFWgulkanaDWEWKWLWWWWWWWW W!W"W#W$W%W&W0WWWWWWWWWWWWWWhWW"jurassicW-W4WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW-arVW[W`WaWcWdW|W@WEWFWGWHWIWJWOWWWWW'W/W0WUWXW[W\W]WdWeWfWkagWWkahiltnaGWHWIWJWRW Wkahiltna-likeeWkaltagTWZW_Wkamishak5WkantishnaBWuWvWwWWWWW=W>W?W@WAWBWCWkateelcWUWXWYWZW[Wkathul_WkatolinatWkcdWeWfWgWkcsRWkelley4WkenaiHW4Wkeyserling WkgVWkgr@WkgsXWYWkgwZWkhcWWkilometerskWfWgWAConsists of two members, a sedimentary unit in fault contact with a volcanic member, which it is inferred to overlie (Connelly and Moore, 1979). The unit structurally overlies the schist of Kodiak Island (Jsch) and Uyak Complex (Kmk), but is generally separated from them by the Afognak pluton. This member consists of a volcaniclastic sequence consisting of thin- to medium-bedded lithic sandstone containing lesser conglomerate, argillite, and siliceous tuff intruded by mafic dikes and silBxls (Connelly and Moore, 1979). As described by Connelly and Moore (1979), unit is rich in primary andesitic material, displays flute casts and complete Bouma sequences indicating deposition by turbidity currents. The rocks are either broadly folded or dip homoclinally to the southeast and have undergone prehnite-pumpellyite facies metamorphism (Connelly and Moore, 1979) fCTrssD Late TriassicE$Shuyak Formation, sedimentary member A4250O ALarge, multiphase hornblende diorite, quartz diorite, and tonalite pluton exposed along the northwest side of the Kodiak Islands (Connelly and Moore, 1979; Roeske and others, 1989). The pluton has a well-developed contact metamorphic aureole with the Shuyak Formation; the boundary with the schist is apparently a fault (Roeske and others, 1989). K-Ar ages on hornblende range between 188 11 and 197 11 Ma (see Roeske and others, 1989); U-Pb age determination is interpreted to indicate aB:n emplacement age of 217 10 Ma (Roeske and others, 1989)(CTrqdDTriassicEAfognak pluton  A108BjCoarse, sub-angular rock fragments to fine sand and silt having poorly to well-developed lobate morphologyCQlsD QuaternaryELandslide depositsFWilson, F.H., Detterman, R.L., and DuBois, G.D., in press, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Bulletin 1969-B, pamphlet, scale 1:500,000. A115,/1991DW!W"W1992AWWW%WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW=W>W?W@WAWBWCWQW1997[W\W^WcWAWTWlocalitiesdWlocallyAWDWMWWWWW W WWWWWW!W"Wlocated W$WlowWWlow-gradeWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWthe VlocatedDWEWMWNWKWLWlolbWloneyUWlongfWgWWWWWWW W!W"W#W$W%W&WlowRWSWTWVWWWZWNthreedWWthroughoutAWdWthrustWtightWtightlyWW&W&WthrustWWtWWWWWWWthrustingWingWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWtiWWW&WthrustW W WWthrustingZWWti^WWWti^WWWWWi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^WWti^Wi^Wi^WWti^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^W^W^W^W^W^W^W^W^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^Wi^WW+ AConsists of two members, a sedimentary unit in fault contact with a volcanic member, which it is inferred to overlie (Connelly and Moore, 1979). The unit structurally overlies the schist of Kodiak Island (Jsch) and Uyak Complex (Kmk), but is generally separated from them by the Afognak pluton. This member consists of vesicular pillow greenstone, locally containing beds of pillow breccia agglomerate, tuff, and argillite (Connelly and Moore, 1979). Greenstone is tholeiitic in compositionCTrsvD Late TriassicE Shuyak Formation, volcanicmemberFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000. A4310ImagnitudedWmainWWmainland W&WmainlyWWic WWWmagnitudedWdWmagoonWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWchistamphiboliteaHVIVJVmajorWkWlWmWnWmamaypWmanyTWcWW WWmapAWBWDWEWFWPWTWeWgWlWmWrWsWyWzW|WKWLWMWZW_W`WcWfWgWiWjWkWlWmWnWoWpWqWWWWWW WWWWWWWWWWW W!W"W#W$W%W&W-W.W0W6W;WQWRWSWTW_WhWiWxWWWWWWmappedAW\WbWuWvWwW}W~W@WGWHWIWJWOWRWTWXWYWbWcWeWfWgWiWjWkWlWmWnWoWpWqWWWWWW W W WWW4W:W<WJWKWLWOWPWbWgWjWkWlWmWnWtWuWvWwW O~fCWDWFWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WforCWiWlWdWhW-WWWWWWWWWWWWW WframeworkDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&WgDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W&W&WWWWWWW W W W WWWWWWWWWWWWWWWWW W!WgeologicalCWDWFWMWiWlWdWhW-WWWWWWWWWWWWWWW W W W WWWWWWWWWWWWWWWWW W!WvdescribinglWdescriptiondW%WdesignatedWdetaileddWdetermination W%WdeterminedWdettermanDWW4WWWWWWWWWWWWWWWWWW!W"Wdettermanandreed1980dividedunitintothreemembersinaVdiabasicWdiabasicbodiesintrudingshuyakformationhavingnoapparenVdiamictiteWdiamictitesandstoneandsiltstoneconglomeratehorizonsconVdiatomsWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWZWaWWWdiabasegabbroleucogabbroandgreenstoneultramaficrocksiXVdiagnostic=W>W?W@WAWBWCWdicotyledonRWdidWWxWdiffereWdifferencesWWWWWW((integratedCWiWlWdWhW-WWWWWWWWWWWWW WinvestigationsCWiWlWdWhW-WWWWWWWWWWWWW WislandsCWMWiWlWdWhW-WWWWWWWWWWWWW WkodiakCWMWiWlWdWhW-WWWWWWWWWWWWW WlDWFWWW W W WWWWWWWWWWWWWWWWW W!W"W#W$W%W&W&W&W&W&Wfresh-waterMWfresh-watersandstoneshaleandconglomeratelocallycontainMVfreshlyWfromDWiWlWdWWWWWWWWW WWWWWWWW!W"W&WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW*light-coloredAWlight-grayAWWlWlight-greendWlight-olive\Wlight-olive-gray[Wdstonlight-greendWlight-olive\Wlight-olive-gray[W[W[W[WWWW[W[W[W[W[W[W[W[W[WgreendWJWWlight-olive\W\Wlight-olive-gray[W[W[W[W[WXXBe Cretaceous foraminifera (approximately Turonian to early Santonian age according to W.V. Sliter, cited in Connelly, 1978) are found in the limestoneCKcctDLate CretaceousE'Cape Current terrane of Connelly (1978)FWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A4240BiDiabasic bodies intruding Shuyak Formation having no apparent thermal aureoles (Connelly and Moore, 1979)CTrvmD Triassic?EMafic dikes, sills, and plugs FWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A4150gRhWWWWWWWW W!W"W#W$W%W&W'W0particularlyWpartlyWpartsWavlis-W-W-W-Wlis-W-W-W-W-W-W-W-W-W-W-W-W-W-Wis-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-WWWWWWWWWWWvlis-WWWWvlis-WW-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W.W.W.W.W-W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.W.WW.W.W.W.W.W.W.W.W.W.W.W.W.WWIWJW7W8W9WpebbleAWHWYWRWSWTWWWXWYW[WcWW WWWcWWWWWpebble-sizedWpebblesWJWpebblyAWMWNWYWaWWWpelagitetWpelecypodW7W8W9WpeliteWWpelitic@WWWWWQWWWWWWWWpeloidWWpeloidalW unitunitbofbyrne1981theserocksareexposedinthevicinityVunitis700-m-thickthelower2/3consistingofsandstoneanVWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWrangelWWWWWW WWWWrangefromcoarsesub-angularrockfragmentstofinesandanVVrangesWW-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-WWWWWWWWWWWWWWWWWWWWW-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-W-WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWrapidVWWrare_WaWdWnWWWWW WRWSWTWaWhWiWWWWrarelyfWgWraspberry-W.WratherUWWWWWaAWDWiWdWW-W4WWWWWWWWWWW W WWWWWWW W!W"Wa23Wa31WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWwiWdWWWWwackedWWwarmWwasdWWWWWW%WwaterWWWWWwaveWWwave-cut WbWbWbWbWWW&WwaterbWWWWWWWWWWWbWbWbWbWbWbWbWbWbWbWbWwaterbWbWbWbWbW&WwaterbWbWbWbWbWbWbWbWbWbWbWbWbWbWbWbWbWbWbWwaterlaideWeWeWeWeWeWeWdWeWeWeWeWeWddWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWeWwaveWWWWWWWwaveWWWWwavelikeW saltuslWsampled&WsandWW W W WWsandstoneAWMWdWW4WWWWWWWWWWWWWWWWWWWWWWWWsandstone-richWsandstonesWsantonianWscarps Whed W W W W W 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WWlocalWWW#WWeiWeiWeiWttleiWiWiWeand\V\V\V\Vhaleand\V\VVtoralandoffshoremarinedepositsofdark-grayshaleand\VVVVV\V\V\V\V\V\V\V\V\V\V\Valeand\V\V\Vand\V\V\V\V\V\V\V\V\V\V\V\Vand\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\V\Vd\V\V\V\V\V\V\V\V\V\V\V\V\V\V\Vd\V\V\V\V\V\V\Vnd\V\Vnd\V\Vayshaleand\V\V\V40yellowish-grayAWyetWyieldWyieldedWyieldingWyieldsWyoungerWW%WyoungestWzeolite-bearingWzoneWWzones$W~W~WW{W|W}W~W~W~W}W~W~W~WW~WWWWWWWW~WWyoungerWWWWsWtWuWvWwWxWyWzW{W|W}W~WyoungereWWWreWngereWreWreWreWreWreWreWreWreWwWereWwWwWwWwWwWwWwWwWwWwWwWwWwWwWyoungereWvWwWwWwWwWwWwWwWwWwWwWwWwWwWwWwWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWc-leadWWzircon@W0WWWWWWWWWWWWWzoneeWdWWWWWWWW W!W"W#W$W%W&W:WaWmountainsAWWmovingWmuchWWmud WmudstoneWWWWmulti-channeledWmultiphase WmultipleWWmuttiWmyaWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWmudWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWunitAWDWMWiWW-W4WWWWWWWWWWWWW WWWWWW!W"W%WW4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4WW&W-W4W4W4W4W4W&W-W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W4W-W4W4WJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWJWIWJWJWJWJWJWJWJWJWJWJWJWWHWIWJWJWJWJWJWJWJWJWJWJWJWxageslW-WW WagglomerateFW W%W&Wair-fallDW!W"WaiulikWalaskaWW WWWWWalaska-aleutianWWaleutian#WaliulikW&W&W&W&W&W&W&W&W&W&W&WW&W&W&W&W&W&W&W&W&W&WWWWWWWWWWWWWWWWWW&WW&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&WW%W&W&W$W%W&W&W&W&W&W&W&W&W&W&W&W&W&W%W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&W&WWWWWWWWWWWWWWWWW%W&WWWP:innumerabledWinoceramusWWintenselydWWWWWWWW WWWWWintensityWdsequenceofdark-graytoblackmassivetotintensityWWWtyWWWWtensityWWinterbedLWLW-magrockintwosill-likintensityWinterbedKWLWLWLWKWLWLWLWLWLWLWLWWWWWWWWWWW4lclassicdWclastWclastic4WWclastsDWWWWWWWWW!W"WclayWclaystoneAWWcleanWclendenenWclimacticWclimateWWclino-pyroxenitehWclinocardiumWcloselydWclusteredlWcmWWWcoalAWWWcoal-bearingAWcoalescingWcoalyWcoarseAWkWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWlWWWWWWWWWWWWWWWWWWWWWnWWWWWWWWWWWWWWWWWnWWWWWWWWWWWWWWWWWWW W!W"W#W$W%W&WkWlWmWnWWWWlWmWnWWWW zscoriaceousDW!W"WseamsMWsecond-WWWsectionWWWWWWsectionsWWsdWdWdWWdW erosionDWWWW!W"Weruptions4WestimateWestimatedWestuaries Westuarine WevergreenWevidenceWexaminationiWexamined&WexampleDW!W"WexclusivelyWexhibitWexists&WexposedWWW W W&W W W W W W W W W W W W Wion W W W W Wration W Woration W W W W W Wration W Wtion W W W W W W W W W W Wration W W W W W W Wation W Woration W W=atDWlWWWWW WWW W!W"W$Waureole WaureolesWavailableWavalancheDW!W"WaveragingWaway WbWb-38WbajocianWbarWbarremianWbasalWWWWWWWWWWW38WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWbabcockWWWWWWCWJWMWPWRWSWTWVWWWYWZW`WaWjWkWlWmWnWtWxWyWzW{W|W}W~WWbasaltgabbrodiabasebasaltictuffandchertmayincludemiZVbasalttorhyoliteflowspyroclasticdepositslahardepositsDVEVKVLVbasalticTWWW[WaWpWqWxWyWiWjWkWlWmWoWpWqWOWVWZWdWeWfWkWlWmWnWbasalticandesiticandrhyoliticflowstuffandbrecciaandpVqVPs A1917oleiitic basalt occurring within both sandstone- and argillite-rich subunits of the Ghost Rocks Formation. Rocks are typically altered by shearing and low-grade metamorphism, yet "* * * these lavas cannot have been derived from a single source and in many respect exhibit chemical affinities to magmas found in a variety of tectonic environments." (Moore and others, 1983, p. 270)CTgvbDTertiary or Cretaceous?E2GhostRocks, basaltic volcanic and hypabyssal rocksFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.A1917toWWWWWWWWWWWWW W W WWWWWWWWWWWW W!W"W$W%W&Wtoarcian4WWtonalite W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW.areasAWDW!W"WargilliteAWdWWWWW Wargillite-richWarkosicdWWWWWaroundlWundlWlWWWWWWWeAW\WOWdWeWW W WWWarkoseOWWWOWOWOWWarkoseOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWOWWlower4WWWWWWWWlowerpartcomposedofdark-graytuffaceouslimestonetuffa4Vlower-slopeWlowermostWlowestWWlucchiWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWtofalternatinggreenandmaroonlimemudstonesucVVlowestPWlozengesAWlsuWludlovianWlymanWWmHWOW[WW1W7W8W9WJWZWWWWma`WaWcWdWfWgWiWjWkWlWmWnWuWvWwWyW|W@WEWFWGWHWIWJWVWrWsWtWuWvWwWxWyWzW{W|W}W~WW WWW'W/W0WEWUWVWXW[W\W]WdWeWfWWWWWWWWWWWWWWWWWWWWWWWWWmackevettWWW2W3W5WWWPmiddleAWWWWmillerDWWW!W"WminimumW%WW W W Wd W W W W W W W Wolland W W Wlland W WWWWWWWWWWWWWW W W W W W W W W W W W W W W W W W W W W W W W W W W Wlland W W W W W W W W W Wd W W W W W W W W W W W W W W W W W W W W W W WW Wlland W WVshaleAWMWW4WWWWWWWWshalesWWshallow-waterWshallowingWshapes-WWsharpWWWWlWWshallow4Wshallow-marineWWWWWWWWWbeddedcalcareoussashallow-marineeWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWshallow-marinelimestoneanddolostonecomprisestheuppertVVVVshallow-marinelimestoneanddolostonefacieshavingreporteVVVVVVVVVVVlow-marinelimestoneanddolostonefacieshavingreporteVVwshew@sills@siltstone@tsimilar@&slabs@sorted@southeast@lspaced@herly@s@some@sorted@southeast@southerly@therly@southerly@@southeast@southerly@@dstreams@studied@fsubvolcanic@suggested@#talc-schist@ tatina@tc@terrane9xterranes@sterrestrial@the@c2atheir@they@thintothick-beddedbufftoorange-weatheredlighttomediu@Othin-bedded@thinly-bedded@tholeiitic@tia@tim@-toYtogether@tokatjikh@trace@tropaeum@turbidity@btyonek@{types@u-pb@unconsolidated@unconsolidatedsiltsandandgraveloffluvialglacialcollu@unfossiliferous@unitKunitconsistsofafluviatileintercalatedsequenceinvario@units@unknown@@DAvThick sections of argillite and local massive sandstone and chert-rich pebble conglomerate. Locally contains tuff beds. Limestone containing planktic foraminifers occurs locally at depositional contacts with pillow basalt. Unit typically occurs to southeast of sandstone-rich unit. Planktonic foraminifers yielding Late Cretaceous and early Tertiary ages (3 collections)vCTghaD Paleocene?E5Ghost Rocks Formation, argillite-rich unit, undividedFWilson, F.H., in prep., Reconnaissance geologic map for the Kodiak Islands, Alaska - Integrated geologic map databases of the United States: U.S. Geological survey Scientific Investigations Map SIM-XXXX, scale 1:500,000.KAMassive to thick-bedded, medium- to coarse-grained, dark-green to gray volcanogenic sandstone containing abundant magnetite grains (Detterman and others, 1996). Interpreted to have been deposited in a deep- to shallowing water environment (Detterman and others, 1996). Megafauna are locally abundant in Shelikof, although, in general, formation is unfossiliferous. Vast majority of fossils collected from formation are ammonites of Callovian age; however, a few specimens suggest a BathonianB_(?) age for some rocks (Allaway and others, 1984, p. A23; Detterman and others, 1985, and 1996)MCJsDMiddle JurassicEShelikof Formation