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HBAM2016AUG95HPro 5.0"pnarrow@dettermanandreed1980dividedunitintothreemembersind@reworked@single@@ @D€SDnP\X@ E R A CCHA FK_AC BFKACF K!_"m#v$B%D&W'C(H)M*R+W,A-C./H1Y2A3C4C5H6A780 K:A;C<9 F>K?_@mAvBACCDEE AGFEHJIOJTKYLAMCNO= HQYRASCTCUJVAWXP@Gc Df HgDjAm_@] AZY![HBAM3016AUG95@beVbluZcvdja"%jkLjnejncJjniIhjnnfjnsGQgjnstHjs#jssKjtMkckhedkjmkk1:c~kkd ,9ksgkukuf kuu!lsmtWndYplspvjqaSqad?]qafTqap\qb=qblilBqblnAqblu@qlsqs&2;Rqtv^qv[qviDrgXsgstabatc`teo )5tgtgaytgcztgdwtgh0tgm{tgsxtgva|tgvb}thE_tibitkgskan?WalluvialSWTWalluvialdepositsSValluvialfanandlandslidedepositsTVand WWW!W+W8W=WDWTW\Wash-fall\Wash-flow\Wash-flowandash-falldeposits\VbarrieraWbeach=WVWbiotiteWW*W7WbiotitequartzmonzoniteVV*V7Vbrooks@WAWBWZW @AGE CLASS CODE DESCRIPTIONFOSSILLABEL NSACLASS NSAMOD QCLASS QUADRANGLE RADIOMETRIC AGE ROCK CLASS ROCK UNIT SOURCE CODE UNIT NAME            DA Rock unitB A Unit nameB AAgeB A DescriptionB GAFossilB ARadiometric ageB A Source codeB GMKL002A Class codeB  A QuadrangleB GM Killik River A Rock classB G ANSAclassB  ALabelB  ANSAmodB GAQclassB G`@ @@A Layout #1^ A BC:\Program Files\Claris Corp\Claris\ USENGLSH.MPR\ CC:\Program Files\Claris Corp\Claris\USER.UPRLD^"M1,,./: AM PM AMYyTtNnFfNFMPROCOMS\nX50SunMonTueWedThuFriSatJanFebMarAprMayJunJulAugSepOctNovDecQ3Q4 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter,  , X50SunMonTueWedThuFriSatJanFebMarAprMayJunJulAugSepOctNovDecf *# * 9/22/2005and;W=W>WDWFWIWLWQWSWTWVWWW[W^W`WbWcWdWgWhWsWWWWWWWWWWmpaniancWcretaceousW WWWW!,W1W9W:WcWdWearliestmWearlyWLWMW`WdWearlycretaceousbarremianandhauteriviandVearlyeoceneandpaleocene`VearlyjurassicMVeoceneWW W W)W+W/W0W5W6W8W`WiWoWpWqWguadalupianWhauteriviandWholocene;W=W>W?DWSWTWVWWWY[W\]holoceneandpleistocene;V=V>VDVSVTVVVWV[Vjurassic"#%GWHWIWJWKWLWMWQWeWfWgWhWkimmeridgianGWIWQWgWhWlateW WWWWWW$W,W1W9W:WEWGWHWIWJWNWOWPWQW_WaWbWcWeWfWgWhWlWmWrWlatecretaceousV VVV,V1V9V:VW ~@@2A Layout #2@@ APrinter@@#ABig text@@ATable @@A Description @@A GSA color @@A Age table      A Layout #1B$$$$@A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PMC $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PMsA Layout #2B @*A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PMC $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PME $,.YesNo/,  , : AM PM E $,.YesNo/,  , : AM PMF $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PMH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMJ  K  L  M  N  O  P  Q  SR  S $,.YesNo/,  , : AM PMT  U $,.YesNo/,  , : AM PMV  W $,.YesNo/,  , : AM PMX    A)J(*;-I:<M?gLN_Q@^`qc[pBru' ;  B   B L  C R VJ Rock classK QuadrangleL Source codeMRadiometric ageNFossilO DescriptionPAgeQ Unit nameR Rock unitT Class codeVNSAclassXNSAmod @B#"{@B#"{@A0 0B#"{@      @@B s@ A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PM RC $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PME $,.YesNo/,  , : AM PMF $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PM UH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMJ $,.YesNo/,  , : AM PMK $,.YesNo/,  , : AM PML $,.YesNo/,  , : AM PM A%xx%%hh%%XX%%HH% %8  8%  Bj%   %F   X @BBA              6    qAPrinterB%$$$$@A   $,.YesNo/,  , : AM PMB   $,.YesNo/,  , : AM PMC   $,.YesNo/,  , : AM PMD   $,.YesNo/,  , : AM PME   $,.YesNo/,  , : AM PM  PF $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PMH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMJ $,.YesNo/,  , : AM PM K $,.YesNo/,  , : AM PML $,.YesNo/,  , : AM PMM  N  O  P  Q  R  S  T  U  V  W  X  Y[ $,.YesNo/,  , : AM PM] $,.YesNo/,  , : AM PM _ $,.YesNo/,  , : AM PMb $,.YesNo/,  , : AM PMd $,.YesNo/,  , : AM PMe  gh $,.YesNo/,  , : AM PMi  j $,.YesNo/,  , : AM PM A$q6&53g<qN"=4JiTqf"UQbilt"m.zjv'KkBv='oDyVD1Qqbytc8pp qn  EW7  GT+j Cc(uq  gtz(p  ~ +# b.`"c<$D  /co%-+j& '/1=(/ =&)/=*MLabelNNSAclassO Quadrangle P Rock classQ Class codeR Source codeSRadiometric ageTFossilU DescriptionVAgeW Unit nameX Rock uniteNSAmod'A "i. @B#"{@  B#"{@AB !BB#"{@         "         " rABig textB@% @6A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PMC $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PME $,.YesNo/,  , : AM PM PF   $,.YesNo/,  , : AM PMG   $,.YesNo/,  , : AM PMH   $,.YesNo/,  , : AM PMI   $,.YesNo/,  , : AM PMJ   $,.YesNo/,  , : AM PM K   $,.YesNo/,  , : AM PML   $,.YesNo/,  , : AM PMM   N   O   P   Q   R   S   T   U   V   W   X   Z  $,.YesNo/,  , : AM PM[   A$V0S$&0K1U=R1$=J?WKT?:KLNViNZKlYxVl5xNB{XU{M+dp, eqs,  t%1,  &2 nC8BN,  CO3?, 3? 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P F $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PMH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMJ $,.YesNo/,  , : AM PM>@  K $,.YesNo/,  , : AM PML $,.YesNo/,  , : AM PMM N O P Q R S T U V W X Y[ $,.YesNo/,  , : AM PM] $,.YesNo/,  , : AM PM?A  _ $,.YesNo/,  , : AM PMb $,.YesNo/,  , : AM PMfg $,.YesNo/,  , : AM PMi $,.YesNo/,  , : AM PMj kl $,.YesNo/,  , : AM PM@B  m $,.YesNo/,  , : AM PMn $,.YesNo/,  , : AM PMopq $,.YesNo/,  , : AM PMr s $,.YesNo/,  , : AM PMt $,.YesNo/,  , : AM PMu A a v $,.YesNo/,  , : AM PMw $,.YesNo/,  , : AM PMx A$q7$%8e<qO";$OgTqg"RMfhlt"i }iv'EkE  D. 'I\%) I]*+b +-fB !, -~@ !-,A{ !. ;   ;/ ;E C, 0F(120(38(4|5((6bfu7a.uY8 n @E@FEHJIOJTKYLAMCG@NO= HQYRASCTCUJVAWXP€H€ D€J€F€A€E€B€!D€%F€+@€/D€4D€9D~€=Dr€AHj€EA€HDe€JA€LD€MA€OFd€PB€S€SCF MMaplabelNNSAclassO Quadrangle P Rock classQ Class codeR Source codeSRadiometric ageTFossilU DescriptionVAgeW Unit nameX Rock unitA&AjNSAmod+A"#$o Description0A)+,.r Minimum ageu Maximum agexQclass @B#"{@B#"{@fAJ  !%&'(*-/0JB#"{@FP9y@: MMaplabelNNSAclassO Quadrangle P Rock classQ Class codeR Source codeSRadiometric ageTFossilU DescriptionVAgeW Unit nameX Rock unitA&AjNSAmod+A"#$o Description0A)+,.r Minimum ageu Maximum agexQclasszor this if NSAclass < 500 @B#"{@B#"{@fEH       /  #$ "! +.),( @@B s@A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PMC $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PM AM PMMN O C8*   *  *   * E  E*   *  FI R E $,.YesNo/,  , : AM PMF $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PMH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMHJ  J $,.YesNo/,  , : AM PMK $,.YesNo/,  , : AM PML $,.YesNo/,  , : AM PMN $,.YesNo/,  , : AM PMN $,.YesNo/,  , : AM PMIK R O $,.YesNo/,  , : AM PMP $,.YesNo/,  , : AM PMQ $,.YesNo/,  , : AM PMR $,.YesNo/,  , : AM PMS $,.YesNo/,  , : AM PMJL R T $,.YesNo/,  , : AM PMU $,.YesNo/,  , : AM PMV $,.YesNo/,  , : AM PMW $,.YesNo/,  , : AM PMX $,.YesNo/,  , : AM PMKM  Y $,.YesNo/,  , : AM PMZ $,.YesNo/,  , : AM PM[ $,.YesNo/,  , : AM PMLG  A*x  x* *{ {* *k k* *[ [* *K   K*   B*  *Y   Y* * *gg*******GO b  @BBfA4 4                             N=         /$"#.)+,X €AKkBKodiak FormationCLate CretaceousDmConsists of graded bed sequences an average 1-m-thick of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGKD003H417IKodiakJ SedimentaryK1917€ATghBGhost Rocks FormationCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)GKD003H261IKodiakJ TectoniteK1780€ATsiBSitkalidak FormationCTertiary, Oligocene to EoceneDXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GKD003H241IKodiakJ SedimentaryK740€ATskBSitkinak FormationCTertiary, OligoceneDPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GKD003H233IKodiakJ SedimentaryK660€ATncBNarrow Cape FormationCTertiary, MioceneDFormation is 700m thick, the lower 2/3 consisting of sandstone and a few conglomerate beds. The upper third consists of siltstone.GKD003=R p H $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMJ  K  L  O  P  Q  R  S $,.YesNo/,  , : AM PMT  V $,.YesNo/,  , : AM PMW  XQS  Y $,.YesNo/,  , : AM PMZ $,.YesNo/,  , : AM PM[ $,.YesNo/,  , : AM PMRT  A)I(*=-H:QbTpactfIsL^O7\| B/@ 3I@ #  K" ar dNr|U;1 BSU z Cp'LJ Rock classK QuadrangleL Source codeO DescriptionPAgeQ Unit nameR Rock unitTNSAclassW Class codeA @B#"{@Bt#"{@A& &B#"{@  @@B s@A $,.YesNo/,  , : AM PMB $,.YesNo/,  , : AM PMTV R C $,.YesNo/,  , : AM PMD $,.YesNo/,  , : AM PMG $,.YesNo/,  , : AM PMH $,.YesNo/,  , : AM PMI $,.YesNo/,  , : AM PMUW U J $,.YesNo/,  , : AM PMK $,.YesNo/,  , : AM PMM $,.YesNo/,  , : AM PMN $,.YesNo/,  , : AM PMO $,.YesNo/,  , : AM PMVX  A%JJ%%MM%  %  % % %K K%  %; Bj;%%+X @BBA            WP ?       [ !@A!VDEF(LIST8LISTA8Sedimentary Igneous Metamorphic Unconsolidated Tectonite8VDEFA((A!=VDEF(LISTHLISTAHALT ALT-POT ALT-BIO ALT-SER ALT-ARG HFS HFS-ALB HFS-HBL HFS-PYX HFS-SAN HVDEFA((A7FMRLFMRLA A7FMRLFMRLA A6FMRLFMRLA A7FMRLFMRLA A9FMRLFMRLA A>FMRLFMRLA  ABFMRLFMRLA AnnsakeyBnsarefsCnsalithD nsadescripEnsaageF maplabelsG maplabels 2`]i A9FPTHRPTH NAME WSPCMARI FPTHADATA:Databases:nsalith.FP5MARIA nsalith.FP3 NAMEA nsalith.FP5 RPTHA NSALITH.FP5 WSPCAE:\Databases\A1 _RPTHRolyNAMEWSPC NAMEAnsadescrip.FP5RPTHANSADESCRIP.FP5RolyAWSPCA E:\DB-5\ A1 RPTH RolyNAME WSPC NAMEA nsaage.fp5 RPTHA NSAAGE.FP5 RolyAWSPCA E:\E.1\DB-5\ A1RPTHRolyNAMEWSPCNAMEAKodiakrefs.FP5RPTHAKODIAKREFS.FP5RolyAWSPCAE:\E.1\DB-5\Kodiak\ A1sRPTHRolyNAMEWSPCNAMEAKodiaklabels.fp5RPTHAKODIAKLABELS.FP5RolyAWSPCAE:\E.1\DB-5\Kodiak\ kdescrip.FP5RPTHAKODIAKDESCRIP.FP5RolyAWSPCAE:\E.1\DB-5\Kodiak\Ym!ARock class ListB Nsamods list`@A7FMRLFMRLA A7FMRLFMRLA A6FMRLFMRLA A=FMRLFMRLA  A9FMRLFMRLA A>FMRLFMRLA  AnnsakeyBnsarefsCnsalithD nsadescripEnsaageF maplabels`s 2`eyBnsarefsCnsalithD nsadescripEnsaageF maplabelsG maplabels 2`dP^SundayMondayTuesday WednesdayThursdayFridaySaturdayJanuaryFebruaryMarchAprilMayJuneJulyAugust SeptemberOctoberNovemberDecemberQ1Q2Q3Q4 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter,  , ZArialSystemFujiyamaExtraBold Lucida FaxTimes New Roman Helvetica MS Sans SerifLucida HandwritingLucida Calligraphy Arial Narrow Verdana Times Tahoma Courier @   T _ s  A9FPTHRPTH NAME WSPCMARI FPTHAROCKET2:Databases:nnsakey.FP5MARIA nnsakey.FP3 NAMEA nnsakey.FP5 RPTHA NNSAKEY.FP5 WSPCAD:\Databases\A1 TRPTH RolyNAME WSPC NAMEA nnsakey.FP5 RPTHA NNSAKEY.FP5 RolyAWSPCA E:\E.1\DB-5\ EE Pro 2.0 - 2.1F!$IH Pro 5.0 - 5.5  r€CMesozoic and Paleozoic?AA structurally complex group of rocks of great lithologic diversity. Includes ellipsoidal lava with associated slate, thin-bedded chert and slate, calcareous slate, graywacke, and limestone, and their metamorphic equivalents, represented by greenstone schists, knotty schists resulting from the kneading together of slates with with chert, graywacke, and greenstone; crystalline limestone, calcareous and sliicieous schist, and mica schist. May include materials of a wide range of ages. InB%cludes Ghost Rocks and Uyak ComplexesGAF010H1001IAfognakJ TectoniteK2190cbasesfWWbasinQWgWbatholithWW*W7WIWbWhWiWbayWW>WFWPWWWbWiWjWnWbaysiWbeiWxWWWbeachW=WWWWWWWWWbecharofFWbWbecome`WbedWW WWW,W1W9W:WbeddedWWGWIWNW`WcWdWfWhWWWbedrockUWbedsWWW W W WWWWW W'W)W+W-W/W0W5W6W8WHWQWfWgWxWyWWWWWWWbeenKWQWcWgW}WbelowWQWgWbeneathWWbetween>WFWWWiWbiotiteIWbWhWiWblack W[WjWWblock;WDWblocksUW\WbodiesWWFWbWbombs[Wboth}WbottomWboumaWxWWWbraidednWbrecciaWWOWPW[WaWjWWbreccialavaflowssillsandlocalpyroclasticandepiclastiaVbrecciatedPWbrieflyjWcandesiteDW[W^WxWWWWandesiteandbasaltlavaflowssillsandplugstheseprimari^Vandesitedaciteandleucobasaltlavaflowsvolcanicbreccia[VVandesiticjW|WangularUWWanylWappearjWapproximatelyPWapronsTWarcaWareWWEWFWIWOWQW[W_W`WbWcWdWfWgWhWiWjWxW}WWWWWWWareas[WargiliteWWargilliteWWW$WxWyWWWWWWWWWWWWargillite-rich}WarkoseWarkosicWWWGWIWfWhWWWWWas;WIWJWPWQW[WbWdWhWnWash;W\Wash-flowDWassemblageWW!WWWWassignedPWassociatedWWWatWW>WFWWW[W\WbWeWfWmWyWWWWWWWavalancheDWscoriaceous[WseamsWWsectionPWQW`WfWgWWsectionsWyWWWsedimentsWWWWseePWeWjWseparate[WsequenceW$WsequencesW WWW,W1W9W:WxWWWWserieseWshaleW WEWLWMW_WcWlWnWWWWWshallow-waterKWshalyNWshapeTWsharpfWshearing}WshelikofKWWshewOWshiftsfWshowiWxWWWshuyakWsided[WsignificantEW_WsiliceousW$WHWMWsillsW$W^WaWsilt=WSWTWWsiltstoneWWWW W W WW'W(W)W-W.W/W3W4W5W6WEWHWIWLWMWPWQW_W`WcWfWgWhWlWmWnWoWpWqWsWWWsiltstonedepositedincool-temperatureclimacticconditionsmVsiltstoneoftrinityislandandsitkinakformationsVa`3averageW WW,W1W9W:WawayWWbarfWbasalitcDWbasalitcandesitetodacitelavaflowsvolcaniclasticdeposiDVbasaltW W W+W0W8WNWOWPW^WyW}WWWWbasaltic[WWbaseWWWQWgWWbasedWWIWbWbayWW>WFWPWWWbWbeachW=Wbeaches=WVWbecharofFWbWbecome`WbedWW WWW,W1W9W:WbeddedWWGWIWNW`WcWdWfWbedrockUWbedsWWW W W WWWWW W'W)W+W-W/W0W5W6W8WHWQWfWgWbeenKWQWcWgWbelowWQWgWbeneathWWbetween>WFWWWbiotiteIWbWblack W[Wblock;WDWblocksUW\WbodiesWWFWbWbombs[WboumaWbrecciaWWOWPW[WaWbreccialavaflowssillsandlocalpyroclasticandepiclastiaVbrecciatedPW€OFPotassium-argon age determination on flow unit was 197 +/- 12 Ma (Wilson and Shew, 1992); age is thought to be minimum age, as it is younger than stratigraphic position suggests.GKR002H625IKarlukJIgneousK4230€PATrkBKamishak FormationCLate Triassic; NorianADetterman and Reed (1980) divided unit into three members, in descending order, Ursus Member, middle member, and Bruin Limestone Member. On Alaska Peninsula (see inset A, pl. 1), Triassic limestone strata was assigned to Bruin(?) Limestone Member of Kamishak Formation by Detterman and others (1996). Reference section of 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 quadr€HDMedium- to dark-olive-gray, slightly calcareous to siliceous and micaceous siltstone with nodules, concretions, and thin, lenticular limestone bedsE@Main fossils present are Buchia Concentrica and a few ammonites.GKR002H513IKarlukJ SedimentaryK3013€IAJniB5Naknek Formation -- Indecision Creek Sandstone MemberC)Late Jurassic; Tithonian and KimmeridgianAJConsists of medium-gray, fine- to medium-grained arkosic sandstone and siltstone. 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 Alaska-Aleutian Range batholith. JEIndecision Creek Sandstone Member is abundantly fossiliferous; however, fossils are restricted almost exclusively to pelecypods of genus Buchia.GKR004H514IKarlukJ SedimentaryK3014€JAJncB'Naknek Formation -- Conglomerate memberC Late Jurassici ÃfÃg`lÃi '-rÃi msÃuÃvE_Ãw (.34nundriftnewhalenstadebrookslakeglaciationAVdriftundividedbrookslakeglaciation@VZVduniteW!WWduringjWduskydWeachWeastjWedifices[WegbertPWeitherTWelevation>WWWellipsoidalWWWend>WWWentranceWWenvironmentKWQWcWfWgWWenvironments}Weolian;WfWepiclasticaWepidoteW#WequigranularFWbWequivalentsWWWerosionEWIW[W_WhWestuaries=Westuarine=WevidenceWexaminationiWexaminedjWexample[Wexhibit}WexistsjW#WfoldsWforEWKWform>WEWWWformationW WW W'W-WOWPWformationis700mthickthelower2/3consistingofsandstonV V'V-VformingUWforms[WfoundKWfragmentsW W(W.W3W4WSWTWfreshIWfromIWSWTWUWgabbroW!WgabbroicW!WgenerallyWgeologicalPW <surficialWW&W2WRWWsurficialdepositsundividedRVsurroundedbWsurveyPWswamp;WsystemcWjWt[WtabularfWtanWNWtectonic}WtemporallyfWten\Wterrace>WWWkWWWWWterraces>WWWterrestrialnWtertiaryWthatWW>WEWQWUWWW[W_W`WgWiWtheW W W'W-WPW[WiWmWxW}WWWWWWtheirWWWthemWWiWtheseOW^WiWjW}WtheyIW`WdWhWiWthickWWWW W W WWW W'W)W,W-W/W1W5W6W9W:WGW[W`WfWyWWWWthick-beddedWWJWKWNWWthicklyWWthicknesscWjWthinW WWWWW W$W,W1W9W:WHWIWMWNWPWQW`WcWdWfWgWhWWthin-beddedGWQWfWgWxWWWWWWWiWstaniukovichdWstructurallyMWsuggestEWKW_WsurveyPWtalkeetnaMWtertiaryyWWWthatPW`WtheWWdWlWtheseWWtheycWthisMWtithonianeWtoIWLW`WcWdWeWhWtoarcianLWMWtriassic Wtriassicmarinefossilsinlowerlimestonelense Vtype`WuPWuncommonfWWunconformablydWunderlyingMWunfossiliferousKWunitGWLWMW`WcWfWlWWupperGWvastKWvolcanicMWwdWeWwasdWwell`WwhereMWwhicheWwithMWlWwolfeEW_WwrittenEW_WdWeWyakatagalWyieldNWPWyieldingyWWWr€AH137IKarlukJUnconsolidatedK137€BAQblilB,Drift, Iliamna Stade, Brooks Lake GlaciationCQuaternary, PleistoceneD,Drift, Iliamna Stade, Brooks Lake GlaciationGKR003H138IKarlukJUnconsolidatedK138€CAQmhdBDrift, Mak Hill GlaciationCQuaternary, PleistoceneDDrift, Mak Hill GlaciationGKR003H139IKarlukJUnconsolidatedK190€DAQviB$Volcanic and shallow intrusive rocksCHolocene and PleistoceneDBasalitc andesite to dacite lava flows, volcaniclastic deposits. Includes air-fall tuffs, volcanic domes, block and ash-flow deposits, ash-flow tuffs, volcanic-rubble flows, debris flows and hot-blast avalanche depositsGKR002H150IKarlukJIgneousK300€EAThBHemlock ConglomerateClate OligocenemakCWmany W}WmapiWmappedQWTW\WmappingKWmarine;W=W>WWWfWkWWmarinebeachandestuarinedepositsmoderatelywellstratifi=VmarinesandstonesofnarrowpointmildlyfoldedandmoderateVmarineterracedepositsstratifiedandmoderatelywellsorte>VWVmartineWmassesWmassiveWWGWIWJWKWMWNW^W`WhWjWxWyWWWWWWWWofargilliteandmxVVmassivetothick-beddedmediumtocoarse-graineddark-greenKVmaterial`WmaycWmeasuredPW`WcWmeasuredthicknessismorethan1200mofdark-graytopale-cVmediumWWGWHWKWNW`WbWdWxWWmediumtocoarse-grainedequigranulargranodioritetoquartzbVmediumtodark-olive-grayslightlycalcareoustosiliceousaHVmediumtothick-beddeddark-graylimestoneandthintoshalyNVmediumtothicklybeddedarkosicwackeandshalehavingoccaV€cEIn 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 Maestrichtian for Kaguyak.GAF002H415IAfognakJ SedimentaryK1955€dAKheBHerendeen FormationC+Early Cretaceous; Barremian and HauterivianAkOriginally 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.kbristol>WWWbrokendWbrooks@WAWBWZWbrown]WdWbrownish-grayPWbruinPWbutEWFWIW_WbWhWbyWWWWWW W$WPWQW[WbWeWgW}WWWWc-4PWc-5PWcalc-alkalinejWcalc-arenaceousdWcalcareousHWPWlWWWWcalcite-recementedPWcannot}Wcap[W^WcapeFWbWmWrWcappsKWcarbonaceous`WnWWcarbonateQWgWcastsWcWWcaused[WcentersSWcerberusWchangesKWchanneledfWWchannelizednWxWWWchannelsfWWchaoticWW!WWWWcharacteristicfWD€SD€VJ€[AC€_A€`K€bF€cEl€dA€fACy€hA€jAq€nA€t@€xA€}B€A€A€A€I€G€C €J €C_€@A€@€J€B€@!JgreenschistW#WgreenstoneWWxWWWWWWWWWgroundmass]WgroupWWWhiWhadQWgWhalfJWWhansonjWharborfWhartsockeWhasjWhaveKWQWTW[W`WcWdWeWgW}WdioriteV"V%Vhot-blastDWhoweverEW_Wi-1685QWiliamnaBWimportantIWimpracticalKWinWW W=WEWKWPWQWSWTW[W\W]W_W`WincludeFW^WincludesW;WDWSW[WincludingW!WindicateWIWOWindividual[Windurated\WinformalWKWinformalunitconsistingprincipallyofmediumtothick-beddVinlandWinsetPWinterbeddedWWJWNWOWinterbedsWWEWMW_WinterpretedIWKWQWintervalPWintervalsQW`WintoPWTWintrudedW$WintrudingWintrusiveFWisW WW'W-WEWIWJWKW[W_WislandsWWtms@cape@connelly@dikes@ghostrocksformation@ghostrocksformationsandstone-richunitundivided@hill@kodiakformation@naknekformationchisikconglomeratemember@sitkalidakformationoffscrapeddeposits@@bajocian@earlycretaceousbarremianandhauterivian@latecretaceousmaestrichtian@middlepermian@or@tertiarytertiaryearliestmioceneorlateoligocene@tertiaryoligocenetoeocene@toarcian@about@along@walthough@andesite@aaverage@cbases@`bristol@mcharacterized@clast@complete@consistofglacialandstreamdepositsinlandandbeachsedi@consistsof1500mofofinterbeddedsandstoneandsiltstone@{consistsofaverage1mthickgradedbedsequencesofthick9|consistsofgradedbedsequencesanaverage1-m-thickofthi@crossite-epidote@ed€jAMassive, 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 and were not examined during this study (see inset A, pl. 1). 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 examineBd exposures and sampled rocks. Limited chemical data from Hill (1979) suggest these volcanic rocks are of calc-alkaline affinity, in contrast to Late Triassic tholeiitic volcanic rocks of nearby mainland (Trv)GKR004H750IKarlukJIgneousK5810~j€=DMarine beach and estuarine deposits. Moderately well stratified and sorted sand and gravel on beaches; mud and silt in estuariesGKR003H115IKarlukJUnconsolidatedK115€>AQmtBMarine terrace depositsCHolocene and PleistoceneAMarine terrace deposits. Stratified and moderately well sorted sand and gravel deposits that form nearly level plains that end locally at prominent wave-cut scarps. Terraces occur at 15 to 18 m elevation along Bristol Bay and between 40 and 45 m elevation along Pacific OceanGKR003H117IKarlukJUnconsolidatedK117€?AQadB&Drift, Alaskan glaciation (Neoglacial)CHoloceneD&Drift, Alaskan glaciation (Neoglacial)GKR003H130IKarlukJUnconsolidatedK130€@AQbluB(Drift, undivided, Brooks Lake glaciationCQuaternary, PleistoceneD(Drift, undivided, Brooks Lake glaciationGKR003H135IKarlukJUnconsolidatedK135€AAQblnB-Drift, Newhalen Stade, Brooks Lake GlaciationCQuaternary, PleistoceneD-Drift, Newhalen Stade, Brooks Lake GlaciationGKR003v}1984KWLW1985KW1988EW_W1996EWKWLWMW_W`WdW3yWWWaEWHWKWMW_WdWlWa23KWabundanceMWabundantKWMWNW`WcWabundantlyIWLWQWgWhWacroteuthisdWageWW WWWWWW,W1W9W:WEWKWLWMWNWPW_W`WcWdWeWageofcopperlakeisnotwellconstrainedsparsemegaflora`VageofunitearlyjurassichettangianandearlysinemurianiMVagesyWWWallawayKWallowcWdWalmostIWhWalsoLWeWalthoughKWLWdWfWWammonitedWammonitesGWHWKWNWcWeWandWandWWWEWHWKWLWMWNWPW_W`WcWdWeWmWyWWWarbitrarilyMWareGWHWIWKWLWMWQW`WcWeWfWgWhWW-locallymappedgrainsizeinthisunitrangesfromcoarsesubTVlocatedWWFWbWlocations[WlowWWWWlowterracegravelalluvialfansbeachdepositsglacialmoraVVVVlow-grade}WlowerW W'W-WGWMWPW`WfWWWg exposedWWjWlWexposureseWjWextrusive^WfiWfaciesKWfallingWfanoWpWqWfansTWWWWW'W-WiWfineFWIWLWSWTW`WcWfWhWWfinetomedium-grainedequigranularquartzdioritequartzmoFVfine-grainedGWnWfirst-cycleIWhWfiveeWflows;WDWNWOW[W^WaWjWWfluteWcWWfluvialEW_WfoldedW#WfoldsWforEWKW_WeWforamsyWWWform>WEWWW_WformationW WW W'W-WOWPW`WcWdWiWmWrWsWtWuWvWzW{W|W}W~WWWWformationis700mthickthelower2/3consistingofsandstonV V'V-VformingUWWforms[WfossilsWfoundKW}WfracturedWfragmentsW W(W.W3W4WSWTW[WfreshIWhWfreshlydWfromIWSWTWUW[W`WfWhWiWjW}WWWs<area`WdWasMWcWassignmentcWdWb38eWbajocianLWbarremiandWbasedMWbasisWWbathonianKWbaydWbeenPWdWbelemnitedWbenthicmWbetweendWblomePWbrachiopodWWbroadleafEW_WbuchiaGWHWIWQWeWgWhWbuchiafossilsareinupperofunitsparseammonitesGVbydWcPWcalcareouslWcalcareousshaleclastscontainalateearlymiocenefaunaelVcallovianKWLWcampaniancWcarbonaceousfWWchignikdWclasticMWclastslWalongW>WFWWWbWWWWalso;W[WeWlWxWWWalterationbWalterediW}WalternatingnWWWWWW W W W WWWWWWWWWWW W!W"W#W$W%W'W(W)W+W-W.W/W0W3W4W5W6W8W;W=W>WDWEWFWHWIWJWKWLWMWNWOWPWQWSWTWVWWW[W\W]W^W_W`WaWbWandesiteDW[W^Wandesiteandbasaltlavaflowssillsandplugstheseprimari^Vandesitedaciteandleucobasaltlavaflowsvolcanicbreccia[VangularUWapproximatelyPWapronsTWarcaWareWWEWFWIWOWQW[W_W`WbWareas[WargiliteWargilliteWWW$WarkosicWWWGWIWas;WIWJWPWQW[WbWash;W\Wash-flowDWassemblageWW!WassignedPWatWW>WFWWW[W\WavalancheDWnonmarinefWWnonsortedUW\WWnonsortedvariablyindurateddepositsofashvitrophyrebloc\VnonstratifedUWWnorthiWnortheastWnorthernJWW€fCnditionsENFossils are uncommon in unit although carbonaceous debris is common locally. GAF008H512IAfognakJ SedimentaryK3012lthinlyW#Wthinlylayeredandcomplexlyfoldedquartz-micaschistgreenV#VthirdW W W'W-WthisTWfWiWjWtholeiiticWOWjW}Wtholeiiticbasaltoccurringwithinbothsandstoneandargill}VthoroughlyWWWWthousand\WthreePW[WtightWtoW WWWWWWW$W,W1W9W:W;W>WDWFWGWHWIWJWKWLWMWNWPWQWSWTWUWWW[W]W`WbWcWdWfWgWhWiWjWxWyW}WWWWWWWWWWtogetherWWWtopPW[W`WWtopography[Wtoward`WtqmiWtriassicWWOWPWjWtrinitysWtrkOWtrmW$WtrvjWtuffW WWWW W$W+W0W8WEWMW_WaWyWWWWWundividedWW&W2W@WRWZWundividedsurficialdepositsVV&V2VuniformW W)W/W5W6W|consistsof1500mofofinterbeddedsandstoneandsiltstoneVVconsistsof40mofmassivelight-graycrystallinelimestoneVconsistsof40mofthintothick-beddedmedium-grainedcrysVconsistsofaverage1mthickgradedbedsequencesofthick VV,V{Bconsistsofaverage1mthickgradedbedsequencesofthick9VconsistsofglacialandstreamdepositsinlandandbeachsedVVoverliesdWoverlyingMWoxfordianeWpKWeWpart`WcWparticularlyeWpedmardWpelagicyWWWpelagicforamsyieldingearlytertiaryandlatecretaceousayVVVpelecypodeWpelecypodsIWNWhWpermianWplacedMWplantsEW_WpliensbachianMWplioceneWWpoorlyWWportdWpresentHWMWQW`WgWpreservedWWrangeLWcWeWreedPWeWreplaceMWreportedWWrepresentr€9DjConsists of average 1 m thick graded bed sequences of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGKG002H417IKaguyakJ SedimentaryK1917€:AKkBKodiak FormationCLate CretaceousDmConsists of graded bed sequences an average 1-m-thick of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGKG003H417IKaguyakJ SedimentaryK1917€;AQsBSurficial depositsCHolocene and PleistoceneAUnconsolidated, porrly to well-sorted, poorly to moderately well-stratified doeposits; consists predominatly of alluvial, colluvial, glacial, marine, lacustrine, eolian, and swamp deposits. Also, locally includes reworked volcanic debris as well as block and ash flows.GKR002H100IKarlukJUnconsolidatedK100€WDWRWTWUWWWXW[W\W^WfWkWnWWWWWdepthQWgWdepthsmWderived}WWdescendingPWdescribeddWdettermanKWPWQW[WbWcWeWfWgWillglaciationCVdriftneoglacialYV~€4DPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GKG003H233IKaguyakJ SedimentaryK660€5ATeoB%Eo-Oligocene marine sedimentary rocksCTertiary, Oligocene to EoceneDXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GKG002H241IKaguyakJ SedimentaryK740€6ATsiBSitkalidak FormationCTertiary, Oligocene to EoceneDXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GKG003H241IKaguyakJ SedimentaryK740€7ATqmBBiotite quartz monzoniteCTertiary, Paleocene?DKodiak batholithFCMobil Oil dates of approximately 62 Ma cited in Byrne (1981, Ph.D.)GKG002H391IKaguyakJIgneousK1320€8ATpeB(Paleocene volcanic and sedimentary rocksCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)GKG002H261IKaguyakJ TectoniteK1780€9AKkdBKodiak FormationCLate Cretaceousf  à )/56opqtuvÃ`Ãzà xÃ0yÄ!baÄ"a|Ä"b}Ä#Ä#aFbÄ$iÄ$1*7wÄ( +08{Ä*( ,19:~Ä*fcÄ2AÄ2adÄ2 Ä2!ÄA!eÄA#GfÄA$HQgÄA%IhÄA'JÄA1KÄBLÄCaMÄG!#ÄQ1NPÄRa$ÄSAOÄSQÄSaÄT!"%ÄhAÄi!j qn,Ã!`@ @" @PevergreenEW_WexclusivelyIWhWfaunaeWlWmWfewHWKWMWforWWKWcWdWforaminiferWWforaminiferaWforaminifersmWforamsyWWWformdWformationKWLWMWdWlWformationsdWfossiliferousWWIWLWQWgWhWfossilsWWWW WEWGWHWIWKWLWPWQW_WcWdWfWgWhWWilsthathavebeenfoundyieldnorianagedettermanandPVfoundPWdWfragmentsdWfromKWLWdWgeneralKWcWgenusIWQWgWgeologicalPWgradationalMWgreatMWguadalupianWWhansonWWhanson1957reportedageoflatemid-permianearlyguadalupiVhanson1957reportedageoflatemiddlepermianearlyguadalVhauteriviandWhavePWdWherendeendWhettangianMWhorizonsMWhoweverIWKWMWcWhWiliamna`WimlayLWinW WEWGWKWMW_W`WcWdWfW]P#BUUX  $,.YesNo/,  , : AM PMO AM PMO^A AzHHzA@HP LJ5M (lj5m1)@w@yXX @MSUD7HP LaserJet 5M%d A{dD660XX @MSUD7HP LaserJet 5M%d A{dD€[€\AQapBAsh-flow and ash-fall depositsCHoloceneDNonsorted, variably indurated deposits of ash, vitrophyre blocks, and (or) pumiceous lapilli. Mapped in Valley of Ten Thousand Smokes and at Kaguyak CraterGAF006H161IAfognakJIgneousK311€]AQadBDomesCHoloceneDDacitic or rhyolitic vitrophyres having plagioclase, pyroxene, and (or) hornblende phenocrysts in a brown to grayish-brown glassy groundmass.GAF002H181IAfognakJIgneousK401€^AQTvBVolcanic rocksCQuaternary and Pliocene?DAndesite and basalt lava flows, sills, and plugs. These primarily extrusive rocks typically cap ridges and include massive lava flows, agglomerate, and lahar deposits.GAF002H190IAfognakJIgneousK450€_AThBHemlock ConglomerateClate OligocenekodiakformationV VVV,V1V9V:V~VVlake@WAWBWZW`Wlandslide<WTWUWWlandslidedeposits<VUVVlessuWlimestoneNlocallyWWmaficWmaficdikessillsandplugsVmainlyWWWWWWWWmainlytertiarysandstoneandshaleVmainlytriassicandjurassicrockspossiblysomepaleozoicoVVVmainlyuppercretaceousrocksVVVVmakCWmarine WW)W5W=W>WVWWWkWWmarinebeachandestuarinedeposits=VmarinebeachdepositsVVmarinesandstonesofnarrowpointVmarineterracedeposits>VWVmchughWmchughcomplexVmelange{WmemberWW$WGWHWIWJWKWQWfWgWhWWWmiocene W'Wmiocenesedimentaryrocks V'VmonzoniteWW*W7WmorevWnaknekGWHWIWJWQWeWfWgWhWWWnaknekformationeVy€fAType 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. 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 variable directional eolian type, Bsome is small-scale, tabular crossbedding with clay drapes characteristic of point bar deposits (Detterman and others, 1996). 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 co€hAJConsists of medium-gray, fine- to medium-grained arkosic sandstone and siltstone. 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 Alaska-Aleutian Range batholith. JEIndecision Creek Sandstone Member is abundantly fossiliferous; however, fossils are restricted almost exclusively to pelecypods of genus Buchia.GAF008H514IAfognakJ SedimentaryK3014DÃ7  +08ÃB aÃG0FbÃJ *7ÃQkÃQ lÃQ0mÃQ@nÃQPoÃQ`pqÃR`cÃR ,19:ÃSÃU dÃVÃV ÃX!ÃZ0ÃaiÃbeÃb JÃb0GfÃb@HgÃbPIhÃbpQÃcKÃdLÃeM56789:karluk !"#$;<=>?@ABCDEFkodiak trinityWW&W'W(W)W*W+W,W-W.W/W0W1WtrinityislandsVV&V'V(V)V*V+V,V-V.V/V0V1V igneous"%*7DFmetamorphic#sedimentary $'(),-./134569:Etectonite  !+08unconsolidated&2;<=>?@ABC Ã!&2;Ã!<Ã"`=Ã">Ã$?Ã$`@Ã$AÃ$BÃ*CÃADtoarcianLWtriassicWW $WNWOWPWyoungeriW1W WWWWW,W9WPWjW1-m-long[W1-m-thickW1W:W10W100WW100-m-thickxWWW120W1200cW15>WWWW1500WW169-171eW179eW18>WWW181eW1900eW1912eW1923KW1957jW1966eW1978W$W1979OWPWjW1980PW1981bW1981b[W1983}W1991[W1992OW1993[W1996KWPWQWcWeWfWgW1:250000-scale[W1:63360-scalePW2 WJW2/3W W'W-W20JWW200WW270}W30[WxWWWW300[W3000W W)W/W5W6W350WW40WW>WWW45>WWW60[WW614W624fWW638QWgW700mW W'W-W759GW800PWaWW WWWW W'W-WKWPWQWTW[W]WgWiWjWmW}WWWW€/DXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GTI003H241ITrinity IslandsJ SedimentaryK740€0ATghBGhost Rocks FormationCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)GTI003H261ITrinity IslandsJ TectoniteK1780€1AKkBKodiak FormationCLate CretaceousDmConsists of graded bed sequences an average 1-m-thick of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGTI003H417ITrinity IslandsJ SedimentaryK1917€2AQs?BSurficial depositsC QuaternaryDUndivided surficial depositsGKG002H100IKaguyakJUnconsolidatedK100€3AToB'Oligocene continental sedimentary rocksCTertiary, OligoceneDPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GKG002H233IKaguyakJ SedimentaryK660€4ATskBSitkinak FormationCTertiary, Oligocene}hillCWhypabyssal|W}WiliamnaBWindecisionIWhWintrusiveDWbWWWWintrusiverocksbVislandW#WsWislandsmWjurassicWWWkaguyakcWkaguyakformationcVkamishakPWkamishakformationPVkialagvikLWkialagvikformationLVkodiakW WWWW#W,W1W9W:W~WWztuffaceousW WW+W0W8WMWWWWtuffsDWturbidityWxWWWtwoWtypefWWtypesectionconsistsof624moffinetocoarse-grainedligfVVtypesWW!WWWWtypicallyFWTW[W^W`WbWcWfWyW}WWWWWuPWugakiWugashik-karlukQWultramaficW!WWuncommonWunconfirmedWunconformityWunconsolidated;Wunconsolidatedporrlytowell-sortedpoorlytomoderatelywe;VunderliejWunderlyingEW_WfWundisturbedUWundividedWW&W2W@WRWZWtWWWundividedsurficialdepositsVV&V2VVuniformW W)W/W5W6WdW€LDOlive-gray to green, medium-bedded, fine- to medium-grained graywacke, mudstone, siltstone, and shale; local lenses of volcanic pebble conglomerate.AShallow-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).GKR002H530IKarlukJ SedimentaryK3190€MAJtBTalkeetna FormationCEarly JurassicDLower 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.irestrictedIW`WhWresultMWrichlyWWrichlyfossiliferousmarinefossilsofplioceneageVVrockMWrocksWWKWMWdWsPWsandstoneIW`WhWsection`WsedimentaryMWseeLWsequenceMWshalelWshallow-waterLWshallow-waterdepositsofkialagvikformationareabundantlyLVshelikofKWsilicifiedWWsiltstone`WsimilardWsinemurianMWsizecWsomeKWspdWsparseGW`WcWspecimensKWdWstagesMWggestEWKW_WsurveyPWtalkeetnaMWthatPW`WtheWWdWtheseWWtheycWthisMWtoIWLW`WcWdWtoarcianLWMWtriassic Wtriassicmarinefossilsinlowerlimestonelense Vtype`WuPWunderlyingMWunfossiliferousKWunitGWLWMW`WcWupperGWvastKWvolcanicMWwasdWwell`WwhereMWwithMWwolfeEW_WwrittenEW_WyieldNWPW€d€eAJnBNaknek FormationC%Late Jurassic; Tithonian to OxfordianDOriginally named Naknek Series by Spurr (1900, p. 169-171, 179, 181) for exposures at Naknek Lake. Detterman and others (1996; see also, Detterman and Hartsock, 1966; Martin and Katz, 1912) have subdivided unit into five members on Alaska Peninsula. EMegafossils, particularly pelecypod Buchia (Detterman and Reed, 1980, p. B38; J.W. Miller, written communs., 1982-88), are common, and fauna, which also includes ammonites, indicate age range of Oxfordian to late Tithonian (Late Jurassic).GAF008H510IAfognakJ SedimentaryK3010€fAJnnB4Naknek Formation -- Northeast Creek Sandstone MemberCLate Jurassic; OxfordianktertiaryoligocenetoeoceneV V)V/V5V6VtertiarypaleoceneVV*V7VwVtertiarypaleocenetoeoceneV V+V0V8VVtertiaryplioceneVVtertiaryplioceneorlatemiocenelVtithonianIWeWhWtoWW W W)W+W/W0W5W6W8WGWLWeWtWuWvWWWWWW,W9WPW1-m-long[W1-m-thickW1W:W100WW1200cW15>WWW1500WW18>WWW1923KW1978W$W1979OWPW1980PW1981bW1981b[W1991[W1992OW1993[W1996KWPWQWcW1:250000-scale[W1:63360-scalePW2 WJW2/3W W'W-W20JW200WW30[W300[W3000W W)W/W5W6W350WW40WW>WWW45>WWW60[W638QW700mW W'W-W759GW800PWaWW WWWW W'W-WKWPWQWTW[W]WabandonedKW5 AZ AY![[[[[}representMW€+ATpeB(Paleocene volcanic and sedimentary rocksCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)GTI002H261ITrinity IslandsJ TectoniteK1780€,AKkdBKodiak FormationCLate CretaceousDjConsists of average 1 m thick graded bed sequences of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGTI002H417ITrinity IslandsJ SedimentaryK1917€-ATncBNarrow Cape FormationCTertiary, MioceneDFormation is 700m thick, the lower 2/3 consisting of sandstone and a few conglomerate beds. The upper third consists of siltstone.GTI003H223ITrinity IslandsJ SedimentaryK580€.ATskBSitkinak FormationCTertiary, OligoceneDPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GTI003H233ITrinity IslandsJ SedimentaryK660€/ATsiBSitkalidak FormationCTertiary, Oligocene to EocenemiddlepermianVmioceneW W'W-WFWbWlWmWrWsWnorianNWPWoligoceneWW W W(W)W.W/W3W4W5W6WEW_WmWnWsWtWuWvWWFWiWlWmWoxfordianGWHWQWeWfWgWpaleoceneW WWW*W+W0W7W8W`WwWxWyWzW{W|W}WpermianWWjpermianearlyguadalupianVpleistocene;W=W>W@WAWBWCWDWSWTWVWWWZW[WplioceneWWFW^WbWlWplioceneandlatemiocenebVplioceneandormioceneFVquaternary&2<@WAWBWCWRUXZW^Wkquaternaryandpliocene^Vquaternarypleistocene@VAVBVCVZVtertiaryWWWWW W W W WWWW'W(W)W*W+W-W.W/W0W3W4W5W6W7W8WaWiWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}Wti003-./01ti004klmnopti005ti006‚rr‚ss‚tt‚uu‚vv‚ww‚xx‚yy‚zzÃ!&2;RÃ!`SÃ!pTÃ!WÃ#XÃ$?YÃ$`@ZÃ$AÃ$BÃ$CÃ&D[Ã' \Ã) ]Ã*^Ã20Ã3@ '-Ã4 E_Ã4@ (.34Ã5  )/56Ã6` trinityWW&W'W(W)W*W+W,W-W.WtrinityislandsVV&V'V(V)V*V+V,V-V.V igneous"%*metamorphic#sedimentary $'(),-.tectonite  !+unconsolidated& Ã!&ÃfÃi '-Ãw (.à )Ä$1*Ä( +Ä*( ,Ä2AÄ2 Ä2!ÄG!#ÄRa$ÄSQÄSaÄT!"%ÄhAy[€f€gAJnsB0Naknek Formation -- Snug Harbor Siltstone MemberC)Late Jurassic; Kimmeridgian and OxfordianAReference 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. 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 that had restricted circulation.EcIt is lowest abundantly fossiliferous member of Naknek; main fossils present are of genus Buchia. GAF008H513IAfognakJ SedimentaryK3013€hAJniB5Naknek Formation -- Indecision Creek Sandstone MemberC)Late Jurassic; Tithonian and Kimmeridgian€%FHK-Ar ages on hornblende of 192.7, and 188.4 Ma; U-Pb age of about 210 MaGAF004H630IAfognakJIgneousK4310€&AQs?BSurficial depositsC QuaternaryDUndivided surficial depositsGTI002H100ITrinity IslandsJUnconsolidatedK100€'ATmsBMiocene sedimentary rocksCTertiary, MioceneDFormation is 700m thick, the lower 2/3 consisting of sandstone and a few conglomerate beds. The upper third consists of siltstone.GTI002H223ITrinity IslandsJ SedimentaryK580€(AToB'Oligocene continental sedimentary rocksCTertiary, OligoceneDPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GTI002H233ITrinity IslandsJ SedimentaryK660€)ATeoB%Eo-Oligocene marine sedimentary rocksCTertiary, Oligocene to EoceneDXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GTI002H241ITrinity IslandsJ SedimentaryK740€*ATqmBBiotite quartz monzoniteCTertiary, Paleocene?DKodiak batholithGTI002H391ITrinity IslandsJIgneousK1320E€VJUnconsolidatedK115€WAmtBMarine terrace depositsCHolocene and PleistoceneAMarine terrace deposits. Stratified and moderately well sorted sand and gravel deposits that form nearly level plains that end locally at prominent wave-cut scarps. Terraces occur at 15 to 18 m elevation along Bristol Bay and between 40 and 45 m elevation along Pacific OceanGAF006H117IAfognakJUnconsolidatedK117€XArgBRock glacier depositsC QuaternaryDRock glacier depositsGAF006H127IAfognakJUnconsolidatedK127€YAndBDrift, NeoglacialCHoloceneDDrift, NeoglacialGAF006H130IAfognakJUnconsolidatedK130€ZAbluB(Drift, undivided, Brooks Lake glaciationCQuaternary, PleistoceneD(Drift, undivided, Brooks Lake glaciationGAF006H135IAfognakJUnconsolidatedK135€[AQvBVolcanic rocksCHolocene and Pleistocenesedimentary W W W WWW$W'W(W)W+W3W5W8WlWsequencelWshaleWWWshallowDWshelikofKWshelikofformationsandstonememberKVshuyakWW$WshuyakformationsedimentarymemberV$VshuyakformationvolcanicmemberVsillsWsiltWWWWsiltstoneHWQWgWmWsWsiltstoneoftrinityislandandsitkinakformationsVsiltstoneoftrinityislandsmV€!DLithologically chaotic assemblage of deep-sea rock types. Gabbroic and ultramafic rock, including layered gabbro, clinopyroxenite, dunite, and plagioclase peridotite.GKR006H470IKarlukJ TectoniteK2197€"AJaBAfognak PlutonCJurassicD0Hornblende diorite and hornblende quartz dioriteFHK-Ar ages on hornblende of 192.7, and 188.4 Ma; U-Pb age of about 210 MaGKR006H630IKarlukJIgneousK4310€#AJsBSchist of Kodiak IslandCJurassicDvThinly layered and complexly folded quartz-mica schist, greenschist, crossite-epidote schist, and epidote amphibolite.GKR006H572IKarlukJ MetamorphicK3610€$ATrssB$Shuyak Formation, sedimentary memberC Late TriassicDVolcaniclastic sequence consisting of thin- to medium-bedded lithic sandstone containing lesser conglomerate, argillite, and siliceous tuff intruded by mafic dikes and sills (unit Trm of Connelly, 1978).GKR006H610IKarlukJ SedimentaryK4150€%AJaBAfognak PlutonCJurassicD0Hornblende diorite and hornblende quartz dioriteeL€JALimited to northern half of Alaska Peninsula, consists of massive to thick-bedded conglomerate and interbedded, crossbedded, clean quartzose sandstone. Clasts as large as 2 m. Clast composition is mainly granitic rocks, and up to 20 percent metamorphic and volcanic rocksGKR002H511IKarlukJ SedimentaryK3016principallyblackshaleandlocalschistosetuffafewshale VprobablyEW[W_WWprominent>WWWproportionEW_WcWproportions`Wproviding[WpualeWWPWjWpumiceSWpumiceous\WpyramidbWpyroclasticaWpyroxene]WbWquadrangle[WquadranglesPWquartzW"W%WEWFW_WbWWWWWquartz-micaW#WquartziteWquartzoseJWWrPWradiolarianWWWrandomlyWWrangeIWhWWWWWrangesSWTWrangesfromcoarsesubangularrockfragmentstofinesandanSVrangingUW[WWrapidKW#Wschistose WsectionsWsedimentsWsequenceW$WsequencesW WWW,W1W9W:WshaleW WEWshuyakWsignificantEWsiliceousW$WHWsillsW$Wsilt=WsiltstoneWWWW W W WW'W(W)W-W.W/W3W4W5W6WEWHWIWlatecretaceousmaestrichtianVVlatecretaceousmaestrichtianandcampaniancVlatejurassicJVlatejurassickimmeridgianandoxfordianQVgVlatejurassiclateoxfordiantokimmeridgianGVlatejurassicoxfordianHVfVVVlatejurassictithonianandkimmeridgianIVhVlatejurassictithoniantooxfordianeVlateoligoceneEV_VlatetertiaryaVlatetriassicVV$VOVlatetriassicnorianNVPVlatestWWWlatestcretaceousorearlytertiaryVVVmaestrichtianWcWWmesozoicWWWmesozoicandpaleozoicVVVmiddleWKWLWmiddleandearlyjurassicbajociantotoarcianLVmiddlejurassiccallovianKVocene@VAVBVCVtertiaryWWWWW W W W WWWW'W(W)W*W+W-W.W/W0W3W4W5W6W7W8WtertiarymioceneV V'V-VtertiaryoligoceneV V(V.V3V4Ve€E€FATqdBQuartz dioriteCPliocene and (or) MioceneA.Fine- to medium-grained, equigranular, quartz diorite, quartz monzodiorite, granodiorite and quartz monzonite. Intrusive bodies are typically located along Pacific coast and include, but are not limited to, large plutons at Agripina Bay, Mount Becharof, Cape Kubugakli and between Wide and Portage Bay.FPotassium-argon ages range from 2.3 to 3.2 Ma (Wilson and others, 1981; F.H. Wilson and Nora Shew, unpub. data, 1990; Wilson and Shew, 1992)GKR002H362IKarlukJIgneousK1250€GAJnsB$Naknek Formation -- Sandstone memberC-Late Jurassic; late Oxfordian to KimmeridgianDUpper part consists of up to 759 m of mainly thin-bedded fine-grained, olive-brown sandstone. Lower part mainly massive to thick bedded medium- to coarse-grained arkosic sandstoneE7Buchia fossils are in upper of unit, sparse ammonites.GKR002H512IKarlukJ SedimentaryK3012€HAJnstB$Naknek Formation -- Siltstone memberCLate Jurassic; OxfordiandikesWdioriteFWdomes]drift?W@WAWBWCWYWZWdriftalaskanglaciationneoglacial?VdriftiliamnastadebrookslakeglaciationBVdriftmakhillglaciationCVdriftneoglacialYVdriftnewhalenstadebrookslakeglaciationAVdriftundividedbrookslakeglaciation@VZVeo-oligocene W)W5Weo-oligocenemarinesedimentaryrocks V)V5Vestuarine=WfanTWformationWWWWWW WWWWW W$W,W-W.W/W0W1W4W6W9W:WGWHWIWJWKWLWMWPWQW`WcWdWeWfWgWhWnWoWpWqWrWsWtWuWvWxWyWzW{W|W}W~WWWWWWWWWWWfresh-waterWWfresh-watersandstoneshaleandconglomeratelocallycontainVVgabbroicW!WWghostW0WxWyWzW{W|W}WWWWWWWostrocksformationmelange{VWd€PBgangles). 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. UEFossils that have been found yield Norian age (Detterman and Reed, 1980; C.D. Blome, U.S. Geological Survey, oral commun., 1981).AZA 46-m-thick columnar-jointed 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 basalt is sill from overlying Early Jurassic Talkeetna Formation or, alternatively, a flow from Kamishak that yields an analytically "minimum" age.ZGKR004H601IKarlukJ SedimentaryK4020€[AAndesite, dacite, and leucobasalt lava flows, volcanic breccia, lahar deposits, and debris-flow 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 more of rocks. Unit typically forms volcanic edifices; it also forms isolated outcrops that cap ridges, providing a good example of topography reversal caused by erosiBon. 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. Basaltic scoria cones occur at three separate locations in the Mount Katmai 1:250,000-scale quadrangle (Riehle and others, 1993). Rocks are highly scoriaceous to vitrophyric, ranging in size from cinder-size fragml€bFPotassium-argon ages range from 9.43 +/- 0.26 to 3.21 +/- 0.14 Ma (Wilson and others, 1981; F.H. Wilson and Nora Shew, unpub. data, 1990; Wilson and Shew, 1992)GAF002H362IAfognakJIgneousK1250€cAKkBKaguyak FormationC,Late Cretaceous; Maestrichtian and CampanianAMeasured thickness is 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 and others, 1996B). reportedWWreportsWrepresentativeoWpWqWrepresentedWWWresembleUWrespect}WrestrictedQWgWresultingWWWreversal[WbleNWUWsPWsand=W>WSWTWVWWWsandstoneWWWWWW W W W W WWWWWW W$W'W(W)W+W,W-W.W/W0W1W3W4W5W6W8W9W:WEWGWIWJWKWMWQWscaleWscarps>WWWschistW#Wschistose WsectionPWQWsectionsWsedimentsWseePWsequenceW$WsequencesW WWW,W1W9W:WshaleW WEWLWMWshallow-waterKWshalyNWshapeTWshelikofKWshewOWshuyakWsignificantEWsiliceousW$WHWMWsillsW$Wsilt=WSWTWsiltstoneWWWW W W WW'W(W)W-W.W/W3W4W5W6WEWHWIWLWMWPWQW€BSurficial depositsC QuaternaryDUndivided surficial depositsGKR005H500IKarlukJUnconsolidatedK100€ATqmBBiotite quartz monzoniteCTertiary, Paleocene?DKodiak batholithGKR005H391IKarlukJIgneousK1320€AKkdBKodiak FormationCLate CretaceousDjConsists of average 1 m thick graded bed sequences of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGKR005H417IKarlukJ SedimentaryK1917€ AKufBUyak FormationCTriassicAPrincipally black shale and local schistose tuff. A few shale and sandstone graded beds occur. Middle third of Formation contains many beds of pillow basalt and red chert and the upper characterized by thick layers of light-gray chert. Thin limestone lenses occur in 2 placesE0Triassic marine fossils in lower limestone lenseGKR007H457IKarlukJ TectoniteK2190€!AKuuB,Uyak Complex - gabbroic and ultramafic rocksC CretaceousÃh0#ÃqÃq P{Ãq0N|Ãq@}ÃqP~Ãr$Ãs`OÃt"%ÃuÃv Ãy à Ãjà Ä!Ä!Ä!Ä%a afognak%RSTUVWXYZ[\]^_`abcdefghislandsWW&W'W(W)W*W+W,W-W.W/W0W1WkWlWmWnWoWpWWWWWkaguyak23456789:qkarluk !"#$;<=>?@ABCDEFGHIJKLMNOPQjkodiak irstuvwxyz{|}~$'(),-./134569:EGHIJKLMNPQ_`cdefghtectonite  !+08unconsolidated&2;<=>?@ABCRSTUVWXYZq€j€kB$Alluvium and marine terrace depositsC QuaternaryD$Alluvium and marine terrace depositsGTI004H400ITrinity IslandsJUnconsolidatedK100€lBAlbatross sedimentary sequenceC"Tertiary, Pliocene or late MioceneDDiamictite, sandstone, and siltstone. Conglomerate horizons contain clasts of granite, chert, melange, and slate. Also contain distinctive calcareous shale clasts unlike any nearby exposed unitsEsCalcareous shale clasts contain a late early Miocene fauna; enclosing unit is correlate with the Yakataga FormationGTI004H401ITrinity IslandsJ SedimentaryK565€mBSiltstone of Trinity IslandsC,Tertiary, earliest Miocene or late OligoceneDSiltstone deposited in cool-temperature climactic conditions at outer neritic water depths. Originally included is the Narrow Cape Formation, is now considered a distinctive, older unit.E(Molluscan fauna and benthic foraminifersGTI004H402ITrinity IslandsJ SedimentaryK581€nBSitkinak FormationCTertiary, OligocenefossilsareuncommoninunitalthoughcarbonaceousdebrisisfVVfossilsthathavebeenfoundyieldnorianagedettermanandPVfoundPWdWfragmentsdWfromKWLWdWgeneralKWcWgenusIWQWgWhWgeologicalPWgradationalMWgreatMWguadalupianWWhansonWWhanson1957reportedageoflatemid-permianearlyguadalupiVhanson1957reportedageoflatemiddlepermianearlyguadalVhauteriviandWhavePWdWherendeendWhettangianMWhorizonsMWhoweverIWKWMWcWhWiliamna`WimlayLWinW WEWGWKWMW_W`WcWdWfWW}mayMWcWmegafaunaKWLWMWmegafaunaarelocallyabundantinshelikofalthoughingenerKVmegafloraEW_W`WmegaflorafossilsofbroadleafdeciduousplantsandevergreeEV_VmegafossilseWmegafossilsparticularlypelecypodbuchiadettermanandreedeVmemberIWQWgWhWmid-permianWmiddleWLW`WmillerdWeWmiocenelWmissingMWmollerdWmolluscanmWmolluscanfaunaandbenthicforaminifersmVmostLWMWcWmountdWmountaindWmuchcWnaknekQWgWneedlesEW_WnorianNWPWnot`WofWW WWWWWW,W1W9W:WEWGWIWKWLWMWQW_W`WcWdWeWgWhWoligoceneEW_WonWWMWonlyMWdWoralPWotherdWothersEWKWLWMW_W`WdWoverallLWoverlaindWWMWQW`WpreservedWWrangeLWcWreedPWreplaceMWreportedWWrepresento thavingW]WhemlockEW_Whigh[Whigh-anglefWhighlyWW[WWWWWWWhillCWOWjWhorizonslWhornblendeW"W%WIW]WbWhWhornblendedioriteandhornblendequartzdioriteV"V%VhornfelsbWhot-blastDWhoweverEW_WcWjWhydrothermalbWhypabyssal|Wi-1685QWigvakbWiliamnaBWimportantIWhWimpracticalKWinWW W=WEWKWPWQWSWTW[W\W]W_W`WbWcWfWgWiWjWmWxW}WWWWWWincludeFW^WbWWWWincludedmWincludesW;WDWSW[WWWWWWWWincludingW!WWincreasescWindicateWIWOWhWindicativexWWWindividual[Windurated\WWWWWWWWtPWjWinterbeddedWWJWNWOWoWpWqWxWWWWinterbedsWWEWMW_WiW€[CVents to 1-m-long bombs (Detterman and others, 1981b; T.P. Miller, oral commun., 1991).2GAF006H150IAfognakJIgneousK300isletWWisletsjWisolated[WitIW[WhWits`WjointjWkaguyak\WWkaingnakiWkamishakOWPWkarlukPWkatmai[WkatzeWkmWWkneadingWWWknottyWWWkodiakWW*W7WiW~WkodiakbatholithVV*V7Vkodiakformation~VkubugakliFWliWlacustrine;WlagfWWlagoonalnWlahar[W^WWlake@WAWBWZWeWlaminaefWWlandslideTWUWWlandslidedepositsrangingfromnonsortednonstratifedcoarsUVVlanslide<Wlanslidedeposits<Vlapilli\WlargeWFWJWUW[WbWlateOWjWlateralKWlaterally[WlavaWDW[W^WaWWWWWlavas}WlayeredWW!W#WWlayers Wlenses WLWlenticularHWlessoWuWlessdeformedinterbeddedsandstoneandsiltstonemudstoneaoVlesserW$WxWWWleucobasalt[WWWWvcoccolithsWcoccolithsofindeterminateageandlatecretaceousforaminiVcollectedKWLWcollectionsdWyWWWcommoncWeWfWWcommunEWPW_WdWcommunseWcompletedWcomponentdWconcentricaHWconformableMWconformablydWconsideredMWconstituentsMWconstrained`WcontactMWcontainlWcopper`WcoralWWcorrelatelWcreekIWhWcretaceousW WWW,W1W9W:WyWWWdPWdebrisfWWdeciduousEW_WdepositsLWdettermanEWKWLWMWPW_W`WdWeWdisconformityMWearlyWWLWMWcWlWyWWWeastdWenclosinglWeruptionsMWVhoweverIWKWimlayLWinW WEWGWKWindecisionIWindecisioncreeksandstonememberisabundantlyfossiliferouIVindeterminateWindicateLWinoceramusW WWW,W1W9W:WinoceramuskusiroensisVivaf002RU]^_`abcaf004%af005af006STVWXYZ[\af008defghaf010af011kd002 kd003kd004kd005ikd006rstuvwxyz{|}~kd007kg002235789kg00346:kg004qkg006kg007kr002;DFGHJKLMNOkr003<=>?@ABCkr004EIPQjkr005kr006!"#$kr007 kr009ti002&'()*+,V igneous"%metamorphic#sedimentary $'tectonite  !unconsolidated& Ã!&ÃfÃi 'Ãw à Ä$1Ä( Ä*( Ä2AÄ2 Ä2!ÄG!#ÄRa$ÄSQÄSaÄT!"%ÄhA€EHanson (1957) reported age of late middle Permian (early Guadalupian) for these rocks on the basis of poorly preserved and silicified coral, brachiopod, and foraminifer fossils. GKR002H701IKarlukJ SedimentaryK5730€APlsB LimestoneCPermian; early GuadalupianA|Consists 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 northwest, which places them structurally beneath Triassic rocks that are located on other islands about 1 km away|EHanson (1957) reported age of late mid-Permian (early Guadalupian) for these rocks on the basis of poorly preserved and silicified coral, brachiopod, and foraminifer fossils. GKR004H701IKarlukJ SedimentaryK5730€ATqmBBiotite quartz monzoniteCTertiary, Paleocene?DKodiak batholithGKD002H391IKodiakJIgneousK1320€AQs?'reworked@scoriaceous@buingeneralfossilsaresparsehoweverinlowerpartofunitcVincludeseWindecisionIWhWindecisioncreeksandstonememberisabundantlyfossiliferouIVhVindeterminateWindicateLWeWinoceramusW WWW,W1W9W:WdWinoceramusfragmentsformmajorcomponentofformationalthodVinoceramuskusiroensisV; trinityWW&W'W(W)W*W+W,W-W.W/W0W1WkWlWmWnWoWpWWWWWtrinityislandsVV&V'V(V)V*V+V,V-V.V/V0V1VkVlVmVnVoVpVVVVV igneous"%*7DFO[\]^abijw|}metamorphic#sedimentary $'(),-./134569:EGHIJKLMNPQ_`cdefghlmnopqrstuvxyz~tectonite  !+08{unconsolidated&2;<=>?@ABCRSTUVWXYZkxLneriticmWnewhalenAWnoWWjWnodulesHWQWgWf Ã!&2;RkÃ!`SÃ!pTÃ!WÃ#XÃ$?YÃ$`@ZÃ$AÃ$BÃ*CÃAD[ÃB \ÃQ ]ÃV^Ãa>originallydWeWmWoriginallydescribedaslimestonerocksofformationareactdVoriginallynamednaknekseriesbyspurr1900p169-1711791eVotherWW[WWothersKWPWQW[WbWcWeWfWgW}Woutcrops[WoutermWover[WoverallcWoverlyingfWWconnellyWcontainingWWcontinental W(W3Wcopper`Wcopperlakeformation`VcreekIWfWhWWcretaceousWWWWcurrentWdeformeduWvWdepositsWWW&W2W;W<W=W>WRWSWTWUWVWWWXW\WkWoWpWqWWWWWWonemaficWmaficdikessillsandplugsVmarine WWmemberWWmiocene Wmiocenesedimentaryrocks VmonzoniteWnarrowWnarrowcapeformationVofWWoligocene Woligocenecontinentalsedimentaryrocks Vpaleocene Wpaleocenevolcanicandsedimentaryrocks VplioceneWpliocenemarinesedimentaryrocksVplugsWplutonWquartzWrocksW W W W WWWschistWschistofkodiakislandVsedimentary W W W WWWshuyakWWshuyakformationsedimentarymemberVshuyakformationvolcanicmemberVsillsW€A Informal unit consisting principally of medium- to thick-bedded arkosic and lithic sandstone containing occaisional sections of vesicular pillow lava and pillow breccia. Slightly metamorphosed and moderately deformed. Contains two bodies of red pelagic limestone. EMCoccoliths of indeterminate age and Late Cretaceous foraminifera in limestoneGAF004H420IAfognakJ SedimentaryK2130qcompleteWWcomplexWWWcomplexesWWWcomplexlyW#WcomponentsIWhWcomposedEWMW_WWcomposedprimarilyoffluvialsandstoneandconglomeratethaEV_VcompositionWJW[WWWconcretionsHWconditionsfWmWconeTWconesTW[WconformablefWWconglomerateWWWW W W WWWW$W'W(W)W-W.W/W3W4W5W6WEWJWLWNWPW_W`WfWlWnWoWpWqWxWyWWWWWWWWWWWWWWconglomerateandcross-beddedsandstoneandsiltstonecontaiV V(V.V3V4Vconglomerateandsandstonealternatingwithfine-grainedsannVconglomeraticWconnellyW$WconsiderableSW`WconsideredmWconsistWxWWWW WWWWW'W+W,W-W0W1W8W9W:W;WGWIWJWPWQW`WfWgWhWyWWxnorthwestWWnotFWbWjWnoteKWnovaruptaWnowmWnumerouscWnwWobscuredjWoccaisionalWWWoccur W>WWW[WxWWWoccurring}WoccursPWyWWWocean>WWWodordWofWWWW W W WWWWWWWWWWWW W!W$W'W+W,W-W0W1W8W9W:W;WEWGWIWJWKWLWMWOWPWQWSW[W\W_W`WaWcWdWfWgWhWiWjWlWnWoWpWqWsWxWyW}WWWWWWWWWWWWWWWWWWWWWWWWjWoldermWolive-brownGWolive-grayLWQWfWgWWolive-graytogreenmedium-beddedfinetomedium-grainedgraLVonWW=WPWQWVWdWeWfWiWjWxWWWWonlyjWorTW[W\W]WWoral[WorderPWoriginnWoriginaljW€€AKuB Uyak ComplexC CretaceousDLithologically chaotic assemblage of deep-sea rock types. Includes: argilite and gray chert containing minor tuff; massive arkosic sandstone; pillowed and massive greenstone; bedded radiolarian chert; minor limestone; and tuffaceous argillite.GKD004H450IKodiakJ TectoniteK2190€AKuuB+Uyak Complex- Gabbroic and ultramafic rocksC CretaceousDLithologically chaotic assemblage of deep-sea rock types. Gabbroic and ultramafic rock, including layered gabbro, clinopyroxenite, dunite, and plagioclase peridotite.GKD004H470IKodiakJ TectoniteK2197€APlsB LimestoneCmiddle PermianA^Consists of 40 m of massive, light-gray, crystalline 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 northwest, which places them structurally beneath Triassic rocks that are located on other islands about 1 km away^clastJWWclastic`WclastsEWJW[W_W`WcWlWxWWWWWclayfWclaystoneW W+W0W8WWcleanJWWclimacticmWclinopyroxeniteW!WWcmxWWWWcoalW W(W.W3W4WEW_WnWcoalescingTWcoaly`WcoarseSWTWUW`WWcoarse-grainedGWKWbWfWWcoastWFWbWiWWWWcobbleWWcobblesWWcoherentzWWcolluvial;Wcolumnar-jointedOWcolumnar-jointedbasaltflowsvolcanicbrecciaandagglomeraOVcolyWWcommoncWWcommonly[WWWcommun[WcompensationQWgWWconsistWconsistofglacialandstreamdepositsinlandandbeachsediVconsistingW WWW$W'W-WconsistsWWWW W W WWWWW'W+W,W-W0W1W8W9W:W;WGWIWJWtklowerpartcomposedofdark-graytuffaceouslimestonetuffaMVlowermost`WmWW W WWWWW)W,W/W5W6W9W>WGWJWPWQWWW[WcWfWgWWWmaficW$WbWmagmas}WmagnetiteKWfWWmainEW_WmainlandjWmainlyGWJWfWWWWWWmainlytertiarysandstoneandshaleVinoceramusoflatecretaceousageV VV,V1V9V:Vintervals`WisIWKWLWMWQW`WdWfWgWhWlWWitMWQWgWitislowestabundantlyfossiliferousmemberofnaknekmainQVgVjEW_WdWeWjonesdWjurassicMWeWjustdWkaguyakcWkamishakMWkatmaidWkcdWkialagvikLWMWkillsMWkpdWkstdWkusiroensisWlake`WlateW WWWWW,W1W9W:WEWLWMW_WeWlWyWWWlatestcWlense WlimestoneW WMWlocallyKWNWcWfWWlocallyabundantpelecypodsandammonitesyieldnorianageNVlower WcWlowestQWgWmaestrichtiancWmainHWQWgWmainfossilspresentarebuchiaconcentricaandafewammoniHVmajorMWdWmajorityKWmap`WmarineWW WmassMWWWpresentHWMWpreservedWWrangeLWreportedWWrepresentWo6glacialW;WWWWWWWWWglaciation?W@WAWBWCWZWglacierXWglassy[W]WWgood[WgradationalWgradedWWW W W WW W)W+W,W/W0W1W5W6W8W9W:WcWWgradingW WW,W1W9W:Wgrained`WcWdWgrainsKWgrainsizeSWTWgranitelWgraniticEWJW_W`WiWWWgranodioriteFWbWwgranularWWWgranularintrusiverocksmainlyquartzdioritewithsomedioVVVgravel=W>WVWWWfWWWWWWWgravelsnWgrayWWKWMW[W`WdWWWWgrayish-brown]WgraywackeLWcWWWWWWWWWgreatWWWgreenLWWWJWinterbedsWWEWinterpretedIWKWintrudedW$WintrudingWintrusiveFWisW WW'W-WEWIWJWKWislandsWWm"characterizedWW WchemicalOWjW}WchertWWW WEW_WlWxWWWWWWWWWWchert-pebbleNWchert-richyWWWchieflyWchisikfWcinder[Wcinder-size[WcirculationQWgWcitedPWbblesWWcolluvial;WcompleteWcomplexlyW#WcomponentsIWcomposedEWMWcomposedprimarilyoffluvialsandstoneandconglomeratethaEVcompositionWJWconcretionsHWconglomerateWWWW W W WWWW$W'W(W)W-W.W/W3W4W5W6WEWJWLWconglomerateandcross-beddedsandstoneandsiltstonecontaiV V(V.V3V4VconnellyW$WconsistWconsistofglacialandstreamdepositsinlandandbeachsediVconsistingW WWW$W'W-WconsistsWWWW W W WWWWW'W+W,W-W0W1W8W9W:W;WGWIWJWVd€M€NATrlsB LimestoneCLate Triassic; NorianDMedium- to thick-bedded dark-gray limestone and thin to shaly bedded light tan limestone; locally contains massive chert-pebble and limestone-cobble conglomerate. Interbedded with basalt flows, volcanic rubble flows and agglomerate.E:Locally abundant pelecypods and ammonites yield Norian ageAZA 46-m-thick columnar-jointed 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 basalt is sill from overlying Early Jurassic Talkeetna Formation or, alternatively, a flow from Kamishak that yields an analytically "minimum" age.ZGKR002H602IKarlukJ SedimentaryK4020€OATrvBVolcanic rocksC Late TriassicDColumnar-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)rareW W)W/W5W6WredW WreedPWreferencePWQWgWreferencesectionconsistsofmorethan638mofdark-yellowQVgVregimecWreplacesfWrubbleNWsPWsand=W>WsandstoneWWWWWW W W W W WWWWWW W$W'W(W)W+W,W-W.W/W0W1W3W4W5W6W8W9W:WEWGWIWJWKWMWQWscaleWscarps>WschistW#Wschistose WsectionPWQWsectionsWsedimentsWseePWsequenceW$WsequencesW WWW,W1W9W:WshaleW WEWLWMWshallow-waterKWshalyNWshelikofKWshewOWshuyakWsignificantEWsiliceousW$WHWMWsillsW$Wsilt=WsiltstoneWWWW W W WW'W(W)W-W.W/W3W4W5W6WEWHWIWLWMWPWQW€J€KAJssB&Shelikof Formation -- Sandstone memberCMiddle Jurassic; CallovianAMassive to thick-bedded, medium to coarse-grained, dark-green to gray volcanogenic sandstone containing abundant magnetite grains (Note, owing to rapid lateral facies changes, informal subdivisions of Capps (1923) have been found impractical for mapping and have been abandoned.) Shelikof is interpreted to have been deposited in a deep- to shallow-water environment (Detterman and others, 1996). A?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 Bathonian(?) age for some rocks (Allaway and others, 1984, p. A23; Detterman and others, 1985, and 1996).?GKR002H520IKarlukJ SedimentaryK3020€LAJkBKialagvik FormationC/Middle and Early Jurassic; Bajocian to Toarcian€FHK-Ar ages on hornblende of 192.7, and 188.4 Ma; U-Pb age of about 210 MaGKD004H630IKodiakJIgneousK4310€AQsBSurficial depositsC QuaternaryDMConsist of glacial and stream deposits inland and beach sediments along coastGKD004H400IKodiakJUnconsolidatedK100€AKkBKodiak FormationCLate Cretaceous, MaestrichtianAMedium- to thickly bedded arkosic wacke and shale having occaisional beds of pebbly conglomerate. Flute casts and complete Bouma sequences indicate deposition by turbidity currents below wave base. Strike NE and dips steeply NW, generally deformed in tight large scale foldsEInoceramus kusiroensisGKD004H492IKodiakJ SedimentaryK1917€AKcB'Cape Current terrane of Connelly (1978)CLate CretaceouscapeWW-WrWcapecurrentterraneofconnelly1978VchisikWcoherentzWWcolyWWcomplexWW!WWWWWconglomerateEWJW_WWWWationWWWWWW WWWWghostWghostrocksformationVislandWkodiakW WWWkodiakformationV VVmaficWmaficdikessillsandplugsVmarine WWmemberWWmiocene Wmiocenesedimentaryrocks VnarrowWnarrowcapeformationVofWWoligocene Woligocenecontinentalsedimentaryrocks Vpaleocene Wpaleocenevolcanicandsedimentaryrocks VplioceneWpliocenemarinesedimentaryrocksVplugsWplutonWrocksW W W W WWschistWschistofkodiakislandVsedimentary W W W WWWshuyakWWshuyakformationsedimentarymemberVshuyakformationvolcanicmemberVsillsWtoverwhelmingly[WWowingKWp[WeW}Wpacific>WFWWWbWpaledWpale-browncWparasitic[WpartGWMWPW`WaWcWfWjWWparts`WpebbleLWyWWWpebble-cobble`WpebblesWWpebblyWWpelagicWyWWWpeninsulaJWPWeWxWWWWpercentJW[WWWperidotiteW!WWpetroliferousdWphenocrysts]WpillowWW WyWWWpillowedWWWWplPWjWplacedfWplacesWW WplagioclaseW!W]WWplains>WWWplatydWplsjWplugs^WplutonsFWbWiWpointfWWpoorly;WTWporphyritic[WWporrly;WportageFWiWpositionfWpredominatly;WpresentEWQW_WgWprimarilyEW^W_WnWprincipallyW W€SDRanges from coarse, subangular rock fragments to fine sand and silt in grainsize; locally includes considerable amounts of pumice near volcanic centers.GAF006H105IAfognakJUnconsolidatedK105€TAQafB#Alluvial fan and landslide depositsCHolocene and PleistoceneA%Locally mapped; grainsize in this unit ranges from coarse, subangular rock fragments to fine sand and silt. Alluvial fans either typically have a well-developed cone shape, or multiple cones coalescing into aprons. Landslide deposits have poorly developed to well-developed lobate morphology%GAF006H106IAfognakJUnconsolidatedK106€UAQlsBLandslide depositsC QuaternaryDLandslide deposits ranging from nonsorted, nonstratifed, coarse angular rubble forming lobes, to large discrete blocks that resemble undisturbed bedrockGAF002H108IAfognakJUnconsolidatedK108€VAbeBMarine beach depositsCHolocene and PleistoceneD@Moderately well stratified and sorted sand and gravel on beachesGAF006H115IAfognakwaalthoughWWWamericanbWamountsPWQWSWfWgWxWWWWWWWamphiboliteW#WanW1W:WPWdWandWWWWW W W W WWWWWWWWWWW W!W"W#W$W%W'W(W)W+W-W.W/W0W3W4W5W6W8W;W=W>WDWEWFWHWIWJWKWLWMWNWOWPWQWSWTWVWWW[W\W]W^W_W`WaWbWcWdWeWfWgWhWiWjWkWlWnWoWpWqWsWxWyW|W}WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWteWargilliteWWW$WarkosicWWWGWIWas;WIWJWPWQW[WbWdWash;W\Wash-flowDWassemblageWW!WassignedPWatWW>WFWWW[W\WbWavalancheDWsingle@slightly@ surficial@hthan@thin-sections@thinly@ztuffaceous@uniformsandstoneandsiltstonegradedbedsabout3000mthi@units@weaklymetamorphosedsiltstonegraywackearkoseandconglome@well@wildflysch@1984@sarea@vcoccoliths@evergreen@fossilsareuncommoninunitalthoughcarbonaceousdebrisis@ingeneralfossilsaresparsehoweverinlowerpartofunit@inoceramusoflatecretaceousage@may@overlies@}representMrestricted@staniukovich@i@ti003@Ã7 @Ãh0@ trinity@  Ãf@fÃ@swildflyschW W+W0W8WWwilsonOWiWwithHWMWNWOWcWfWnWyWWWWWWWWWWWWwithincW}WWyellowdWyellowishdWyet}Wzeolite-bearingW W+W0W8WWzonesbW1-m-acrosscW1957WW1966dW1980PWeW1981PW1982-88eW1983-85dWnceMWabundantKWMWNW`WcWabundantlyIWLWQWacroteuthisdWageWW WWWWWW,W1W9W:WEWKWLWMWNWPW_W`WcWdWageofcopperlakeisnotwellconstrainedsparsemegaflora`VageofunitearlyjurassichettangianandearlysinemurianiMVallawayKWallowcWdWalmostIWalsoLWalthoughKWLWdWammonitedWammonitesGWHWKWNWcWandWandWWWEWHWKWLWMWNWPW_W`WcWdWarbitrarilyMWareGWHWIWKWLWMWQW`WcWmedium-beddedW$WLWPWQWgWmedium-grainedW WWW,W1W9W:WFWIWLWhWmedium-grayIWhWmelangelW{WmemberPWfWWmembersPWeWmesozoicEW_WmetamorphicJW`WWWWmetamorphism}WmetamorphosedWWWWWWmetasedimentaryEW_WmetavolcanicWmicaWWWmicaceousHWmid-fancWmid-permianjWmiddle WPW`WmildlyWmiller[WmineralsbWminorWEWIWMWPWQW_W`WfWgWhWWWWWWWmitrofaniabWmixture`WWmoderatelyW;W=W>WQWVWWWgWWWmoderatelywellstratifiedandsortedsandandgravelonbeaVVmonzodioriteFWmonzoniteFWmoore}WmorainalWWWWmoreQW[W`WcWgWiWpWqWvWWPWSWcWnearbyjWlWnearly>WWWneoglacial?WYWjWnodulesHWQWgWJWsitkalidakW/W6WoWpWqWtWuWvWWsitkalidakformationV/V6VsitkalidakformationlessdeformeduVsitkalidakformationmoredeformedvVtsoVsitkalidakformationundividedtVsitkinakW.W4WnWsWsitkinakformationV.V4VnVslope-basinoWsnugQWgWstadeAWBWsurficialWWW&W2W;WRWsurficialdepositsVVV&V2V;VsurficialdepositsundividedRVtalkeetnaMWtalkeetnaformationMVterrace>WWWkWterraneWtrinitymWsWtugidakWtugidakformationVultramaficW!Wundivided@WRWZWtWuyakWW W!WuyakcomplexVuyakcomplexgabbroicandultramaficrocksV!Vuyakformation Vvolcanic WW+W8WDWOW[W^WaWjWvolcanicandshallowintrusiverocksDVvolcanicrocksOV[V^VjVvolcanicrocksofbarrierrangeaVT€`K850€aATabBVolcanic rocks of Barrier RangeC late TertiaryDoBreccia, lava flows, sills, and local pyroclastic and epiclastic tuff, southeast of active part of Aleutian ArcGAF002H311IAfognakJIgneousK1051€bATiBIntrusive rocksCPliocene and late MioceneAMedium- to coarse-grained, equigranular, granodiorite to quartz diorite plutons and stocks containing hornblende, biotite, and pyroxene as mafic minerals and typically are surrounded by well-developed hornfels zones and sporadic hydrothermal alteration in country rocks. Intrusive bodies are typically located along Pacific coast and include, but are not limited to, large plutons at Moss Cape, American Bay, Pyramid Mountain, Mitrofania Island, Devils Bay (Devils batholith, Detterman and othBIers, 1981), Agripina Bay, Mount Becharof, Cape Igvak, and Cape Douglas. 7€JUnconsolidatedK100€AJsBSchist of Kodiak IslandCJurassicDvThinly layered and complexly folded quartz-mica schist, greenschist, crossite-epidote schist, and epidote amphibolite.GAF004H572IAfognakJ MetamorphicK3610€ATrssB$Shuyak Formation, sedimentary memberC Late TriassicDVolcaniclastic sequence consisting of thin- to medium-bedded lithic sandstone containing lesser conglomerate, argillite, and siliceous tuff intruded by mafic dikes and sills (unit Trm of Connelly, 1978).GAF004H610IAfognakJ SedimentaryK4150€ATrsvB!Shuyak Formation, volcanic memberC Late TriassicDVesicular pillowed greenstone, locally containing beds of pillow breccia agglomerate, tuff, and argillite. Greenstone is tholeiitic in composition.GAF004H640IAfognakJIgneousK4250€ATrmBMafic dikes, sills, and plugsC Triassic?D*Diabasic bodies intruding Shuyak FormationGAF004H651IAfognakJIgneousK4240€AJaBAfognak PlutonCJurassicD0Hornblende diorite and hornblende quartz dioritewell;W=W>WQWVWWWgWWWwell-developedTWbWjWwell-roundedWwell-sorted;Wwell-stratified;WwerejWwhendWwhereIWfWhWWwhichWWwideFWWWWbreworked;WrhyoliteWrhyolitic]WrhythmicallyWridges[W^Wriehle[Wrip-upcWrockWW!WSWTWXWWWWrockglacierdepositsXVrocksWWEWJWOW[W^W_W`WbWdWiWjWzW{W|W}WWWWWWWWWWWrubbleNWUWWsPWsampledjWsand=W>WSWTWVWWWfWWWsandstoneWWWWWW W W W W WWWWWW W$W'W(W)W+W,W-W.W/W0W1W3W4W5W6W8W9W:WEWGWIWJWKWMWQW_W`WcWdWfWgWhWlWnWoWpWqWxWyW}WWWWWWWWWWWWWWsandstone-richyWWWsandstonesWscaleWscarps>WWWschistW#WWWWWschistose WschistsWWWscoria[WW6WEWHWIWLWMWPWQW€ DXUniform sandstone and siltstone graded beds about 3,000 m thick Rare conglomerate beds.GKD002H241IKodiakJ SedimentaryK740€ AToB'Oligocene continental sedimentary rocksCTertiary, OligoceneDPConglomerate and cross-bedded sandstone and siltstone containing coal fragments.GKD002H233IKodiakJ SedimentaryK660€ ATmsBMiocene sedimentary rocksCTertiary, MioceneDFormation is 700m thick, the lower 2/3 consisting of sandstone and a few conglomerate beds. The upper third consists of siltstone.GKD002H223IKodiakJ SedimentaryK580€ATpB!Pliocene marine sedimentary rocksCTertiary, PlioceneDConsists of 1,500 m of of interbedded sandstone and siltstone characterized by randomly distributed pebbles and cobbles. A single 1 m thick cobble conglomerate bed reported 350 m above base of unitE5Richly fossiliferous, marine fossils of Pliocene age.GTI002H212ITrinity IslandsJ SedimentaryK550€AQs?BSurficial depositsC QuaternaryDUndivided surficial depositsGKD002H100IKodiak€P€QAJnsB0Naknek Formation -- Snug Harbor Siltstone MemberC)Late Jurassic; Kimmeridgian and OxfordianAReference 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. 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 that had restricted circulation. As maBpped on I-1685 (Ugashik-Karluk) EcIt is lowest abundantly fossiliferous member of Naknek; main fossils present are of genus Buchia. GKR004H516IKarlukJ SedimentaryK3013€RAQsBSurficial deposits, undividedC QuaternaryDSurficial deposits, undividedGAF002H100IAfognakJUnconsolidatedK100€SAQaBAlluvial depositsCHolocene and PleistoceneintrudedW$WintrudingWintrusiveFWbWWWWisW WW'W-WEWIWJWKW[W_WcWfWhWjWmWWWWislandbWiWsWislandsWW|consistsofgradedbedsequencesanaverage1-m-thickofthiV1V:Vconsistsofmedium-grayfinetomedium-grainedarkosicsandsIVhVconsistsofthickpebble-cobbleconglomerateinitsuppermos`VconsistsofthicksectionsofargilliteandlocalmassivesayVVVconsistsofzeolite-bearingtuffaceoussandstonebasaltclayV V+V0V8VVconspicuousdWconstitutes[WWcontactfWWcontactsWWyWWWcontainEW_W`WiWlWcontainingW WWWWWWW$W(W.W3W4WKWbWyWWWWWWcontainsW WNW`WfWWcontinuous[WcontortedWWWWcontrastjWcontroljWcool-temperaturemWcoonradiWcountrybWcrater[W\WWcreekWcross-beddedW W(W.W3W4WcrossbeddedIWJWfWhWWWcrossbeddingfW.W3WgabbroW!WgabbroicW!WgenerallyWWb singleWW}WsitkalidaktWuWvWWWWsitkalidakformationlessdeformeduVsitkalidakformationmoredeformedvVsitkalidakformationundividedtVVsitkinaksWWWsize[WxWWWWslateW WW,W1W9W:WlWWWWWWWWslateargillitegraywackeandconglomeratethoroughlyinduraVVVVslatesWWWsmokes\WsnowyWsnugfWsomeQWfWgWWsorted=W>WVWWWsourceEW_W}WsoutheastaWiWyWWWspatter[WsporadicbWspurreWstadeAWBWsteep[WWsteeplyWstocksbWstrataPWstratified=W>WVWWWstratigraphicallyWstreamWnWWWstrikeWstrongdWstructurallyWWjWstructurejWstudyjWsubangularSWTWsubdividedeWsubdivisionsKWsubequal`WsuggestjWsurfacesdWPWQWthin-beddedGWQW6Wq*€h€iATiBGranitic plutonic rocksCTertiary, Eocene or youngerASmall altered granitic plutons that intrude the Ghost Rocks Formation between Portage and Kaingnak Bays and north of Ugak Bay on the southeast coast of Kodiak Island. Examination of a few thin-sections of these plutons show them to be distinctive from the Kodiak batholith (unit Tqm, this map) in that they are more altered and contain little biotite (W.L. Coonrad and F.H. Wilson, unpublished data).GKD005H500IKodiakJIgneousK1300€jAPvBVolcanic rocksCPermian?gdettermanandreed1980dividedunitintothreemembersindPVdevelopedTWdevilsbWdiabasicWdiabasicbodiesintrudingshuyakformationVdiamictitelWdiamictitesandstoneandsiltstoneconglomeratehorizonsconlVdikesW$WdioriteW"W%WFWbWWWWdipWWdippingWWdipsWdirectionalfWdiscreteUWdistinctdWdistinctiveiWlWmWdistributedWWdiversityWWWdividedPWdoeposits;WdoesPWdomesDWdominant[WWdouglasbWdrapesfWdrift?W@WAWBWCWYWZWdriftalaskanglaciationneoglacial?VdriftiliamnastadebrookslakeglaciationBVdriftmakhillglaciationCVdriftneoglacialYVdettermanandreed1980dividedunitintothreemembersind@driftnewhalenstadebrookslakeglaciation@gexposed@ufew@ fromgabbro@ghostrocksformationandesiticvolcanicandhypabyssalrock@ghostrocksformationcoherent@glacial@greenschist@ohaving@inferred@ interchannel@intruded@islet@level@locallymappedgrainsizeinthisunitrangesfromcoarsesub@tlowerpartcomposedofdark-graytuffaceouslimestonetuffa@mak@kmassivedark-greentoblackvolcanicbrecciaagglomerateand@medium-bedded@moredeformedinterbeddedsandstoneandsiltstonemudstonea@neritic@nonmarine@xnorthwest@offshore@originally@overwhelmingly@principallyblackshaleandlocalschistosetuffafewshale@rare@reported@reworked€_€`ATcBCopper Lake FormationCearly Eocene and Paleocene?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 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 medium tBo coarse grained toward top. More fine grained clastic parts of formation contain considerable carbonaceous debris and minor coaly material. }EAge of Copper Lake is not well constrained; sparse megaflora in type section in Iliamna area and abundant megaflora in map area are restricted to sandstone and siltstone intervals that are present in middle part of unit (Detterman and others, 1996).GAF002H250IAfognakJ Sedimentaryc€_AComposed primarily of fluvial sandstone and conglomerate that contain 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. EMegaflora fossils of broadleaf deciduous plants and evergreen needles suggest late Oligocene age (J.A. Wolfe, written commun., 1988, in Detterman and others, 1996)GAF002H231IAfognakJ SedimentaryK650tms 'tnc-rto (3tptpe +8tqdFtqm*7trkPtrlsNtrmtrss$trsvtrvOtsttsi/6tsk.4tslutsmvtssttgttss1978WafognakW"W%WafognakplutonV"V%Valaskan?WalbatrosslWalbatrosssedimentarysequencelValluvialSWTWalluvialdepositsSValluvialfanandlandslidedepositsTValluviumkWalluviumandmarineterracedepositskVand WWW!W+W8W=WDWTW\WkWsW|W}WWWWWWWWWWWWandesitic|Wargillite-richyWWWash-fall\Wash-flow\Wash-flowandash-falldeposits\VbarrieraWbasaltic}Wbeach=WVWbiotiteWW*W7WbiotitequartzmonzoniteVV*V7Vbrooks@WAWBWZWtertiaryearliestmioceneorlateoligocenemVtertiaryearlypaleocenexVyVzV{V|V}VVVVVVtertiaryeoceneoVpVqVtertiaryeoceneoryoungeriVtertiaryeocenetoearlyoligocenetVuVvVVtertiarylatemiocenerVtertiarymioceneV V'V-VtertiaryoligoceneV V(V.V3V4VnVtertiaryoligoceneandearlymiocenesVl€dAInoceramus fragments form major component of formation, although complete specimens have only been found in the Mount Katmai area. A belemnite similar to Acroteuthis sp. A (Jones and Detterman, 1966) was found in rocks of formation just east of Staniukovich Mountain between Port Moller and Herendeen Bay. Ammonite fossils and other collections from Herendeen in Mount Katmai area allow an age assignment of Hauterivian and Barremian for formation (J.W. Miller, written commun., 1983-85; DettBerman and others, 1996). Herendeen conformably overlies Staniukovich Formation (Kst) and is unconformably overlain by Chignik (Kc) and Pedmar (Kp) FormationsGAF008H441IAfognakJ SedimentaryK2150waboutW WWW)W/W5W6WaboveWWQWgWabundantKWQWgWactiveaWactuallydWaeromagneticWaffinities}WaffinityOWjWagejWagesWWWagglomerateWNWOW^WjWagripinaFWbWair-fallDWaiulikxWWWalaskaJWPWeWWalaska-aleutianIWhWalaskan?WaleutianaWaliulikxWWWalluvial;WTWWWWWalluviumkWalluviumandmarineterracedepositskV:WawayWWbasaltW W W+W0W8WbaseWWWbatholithWW*W7WbayWWbeachWbedWW WWW,W1W9W:WbeddedWWbedsWWW W W WWWWW W'W)W+W-W/W0W5W6W8WbelowWbeneathWWblack WbodiesWWboumaWbrecciaWWbyWWWWWW W$WcastsWchaoticWW!W VnarrowW-WrWWnarrowcapeformationV-VrVneoglacial?WYWnewhalenAWnortheastfWWofWW#WaWmWsWWoffscrapedpWqWolderWWWoligocene W(W3Woligocenecontinentalsedimentaryrocks V(V3VorWWWpaleocene W+W8Wpaleocenevolcanicandsedimentaryrocks V+V8VpaleozoicWWWplioceneWpliocenemarinesedimentaryrocksVplugsWplutonW"W%WplutoniciWpointWpossiblyWWWpresentWWWWpresentstreamgravelsandandsiltVVVVquartzWW*W7WFWquartzdioriteFVrangeaWrockXWrockglacierdepositsXVrocksW W W W WWW!W'W(W)W+W0W3W5W8WDWOW[W^WaWbWiWjWxWyWzW{W|W}WWWWWWWWWWWWWWWWWWWWWjb€EAComposed primarily of fluvial sandstone and conglomerate that contain 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. EMegaflora fossils of broadleaf deciduous plants and evergreen needles suggest late Oligocene age (J.A. Wolfe, written commun., 1988, in Detterman and others, 1996)GKR004H231IKarlukJ SedimentaryK650D"@E^ ACP\X@ E R A CCHA FK_AC BFKACF K!_"m#v$B%D&W'C(H)M*R+W,A-C./H1Y2A3C4C5H6A780 K:A;C<9 F>K?_@mAvBBDCE AGFEHJIOJTKYLAMCNO= HQYRASCTCUJVAWXP€H€ D€J€F€A€E€B€!D€%F€+@€/D€4D€9D~€=Dr€AHj€EA€HDe€JA€LD€MA€OFd€PB€SP€H223IKodiakJ SedimentaryK580€ATtgBTugidak FormationCTertiary, PlioceneDConsists of 1,500 m of of interbedded sandstone and siltstone characterized by randomly distributed pebbles and cobbles. A single 1 m thick cobble conglomerate bed reported 350 m above base of unitE5Richly fossiliferous, marine fossils of Pliocene age.GTI003H212ITrinity IslandsJ SedimentaryK550€ AKkdBKodiak FormationCLate CretaceousDjConsists of average 1 m thick graded bed sequences of thick medium-grained sandstone grading to thin slateE!Inoceramus of Late Cretaceous ageGKD002H417IKodiakJ SedimentaryK1917€ ATpeB(Paleocene volcanic and sedimentary rocksCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)GKD002H261IKodiakJ TectoniteK1780€ ATeoB%Eo-Oligocene marine sedimentary rocksCTertiary, Oligocene to Eocene€MAAge of unit, Early Jurassic (Hettangian and early Sinemurian), is based on abundant megafauna; however, this megafauna is present in great abundance in only a few horizons and may represent mass kills as a result of volcanic eruptions (Detterman and others, 1996). Contact of Talkeetna with underlying Kamishak Formation is conformable and gradational; it is arbitrarily placed where clastic sedimentary rocks replace limestone as major constituents of rock sequence. Contact of Talkeetna witBh overlying Kialagvik Formation is structurally conformable; however, it is considered a disconformity, as rocks of late Sinemurian, Pliensbachian, and most of Toarcian Stages are missingGKR002H540IKarlukJ SedimentaryK3250uniformsandstoneandsiltstonegradedbedsabout3000mthiV V)V/V5V6VunitWWWW$WPWTW[WcWeWiWmWyWWWWWWlWunpublishediWunusuallydWupGWJWup-sectioncWupondWupperW W W'W-WGWMWcWfWupperpartconsistsofupto759mofmainlythin-beddedfinGVupper-fancWuppermost`WcWursusPWvalley\WvariablefWvariably\WvariesfWvary`WvesicularWW[WvesicularpillowedgreenstonelocallycontainingbedsofpilVvitrophyre\Wvitrophyres]Wvitrophyric[Wvolcanic;WDWEWJWLWNWOWPWSW[W_W`WjWvolcanic-rubbleDWvolcaniclasticW$WDWvolcaniclasticsequenceconsistingofthintomedium-beddedV$VvolcanogenicKWwiWwackeWwasPWQWgWwaterQWgWmWwaveWQWgWwave-cut>WWWweatherdWweatheringdWFWt{level>WWWlightNWPWdWlight-brownish-grayfWWlight-grayW WlimestoneWWWW WHWMWNWPWQWdWgWjWxWyWWWWWWWWWWlimestone-cobbleNWlimitedFWJWbWjWWlimitedtonorthernhalfofalaskapeninsulaconsistsofmasJVlimitedtonorthernhalfofalaskapeninsulaunitiscomposeVlithicWW$WWlithologicWWWlithologicallyWW!WWWWlithologicallychaoticassemblageofdeep-searocktypesgabV!VVlithologicallychaoticassemblageofdeep-searocktypesincVVVlittleiWloadcWlobateTWlobesUWlobsteWlocal WLWaWfWyWWWlocallyW;W>WIWNWQWSWTWWW[WgWhWxWyWWWWWWWW" ABCDEFGHI J K L M N ABCDEFGHI J K L M N   !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ GHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~unitslWxW}WWWunknownjWunlikelWunpublishediWunusuallydWupGWJWxWWWup-sectioncWupondWupperW W W'W-WGWMWcWfWWupperpartconsistsofupto759mofmainlythin-beddedfinGVupper-fancWuppermost`WcWupwardWursusPWuyakWWWvalley\WvariablefWvariably\WvariesfWvariety}Wvary`WvesicularWW[WWvesicularpillowedgreenstonelocallycontainingbedsofpilVvitrophyre\Wvitrophyres]Wvitrophyric[Wvolcanic;WDWEWJWLWNWOWPWSW[W_W`WjW|WWvolcanic-rubbleDWvolcaniclasticW$WDWvolcaniclasticsequenceconsistingofthintomedium-beddedV$VvolcanogenicKWwiWwackeWWwasPWQWgWwaterQWgWmWwaveWQWgWwave-cut>WWWweaklyWweatherdWweatheringdW€n€oB*Sitkalidak Formation, slope-basin depositsCTertiary, EoceneDxLess deformed interbedded sandstone and siltstone, mudstone and conglomerate, representative of deep-sea fan deposition.GTI004H404ITrinity IslandsJ SedimentaryK740€pB)Sitkalidak Formation, offscraped depositsCTertiary, EoceneDxMore deformed interbedded sandstone and siltstone, mudstone and conglomerate, representative of deep-sea fan deposition.GTI004H405ITrinity IslandsJ SedimentaryK740€qB)Sitkalidak Formation, offscraped depositsCTertiary, EoceneDxMore deformed interbedded sandstone and siltstone, mudstone and conglomerate, representative of deep-sea fan deposition.GKG004H405IKaguyakJ SedimentaryK740€rATncBNarrow Cape FormationCTertiary, Late MioceneDNarrow Cape FormationGKD006H61IKodiakJ SedimentaryK580€sATtsB2Siltstone of Trinity Island and Sitkinak FormationC%Tertiary, Oligocene and Early MioceneD2Siltstone of Trinity Island and Sitkinak FormationGKD006H62IKodiakJ SedimentaryK581N€nA Conglomerate and sandstone alternating with fine-grained sandstone, siltstone, coal, and carbonaceous shale. Primarily of terrestrial origin; deposited as channelized braided stream gravels interebedded with interchannel, lagoonal, and interdistributary bay deposits GTI004H403ITrinity IslandsJ SedimentaryK660 interchannelnWinterdistributarynWinterebeddednWinterpretedIWKWQWgWhWintervalPWWintervalsQW`WgWintoPWTWeWintrudeiWmoredeformedinterbeddedsandstoneandsiltstonemudstoneapVqVmorphologyTWmossbWmostEW_WmostlyfWWmountFW[WbWWmountainbWWmud=WmudstoneLWPWoWpWqWmulti-channeledcWmultipleTWnaknekeWnamedeWnarrowmWrWWnarrowcapeformationrVneWnearPWSWcWnearbyjWlWnearly>WWWneoglacial?WYW[bajocianLWbarremiandWcallovianKWcampaniancWcretaceousW WWWW!,W1W9W:WcWdW~WWWWWWWWWearliestmWearlyWLWMW`WdWsWtWuWvWxWyWzW{W|W}WWWWWWWWWWWearlyjurassicMVeoceneWW W W)W+W/W0W5W6W8W`WiWoWpWqWtWuWvWWguadalupianWhauteriviandWholocene;W=W>W?DWSWTWVWWWY[W\]holoceneandpleistocene;V=V>VDVSVTVVVWV[Vjurassic"#%GWHWIWJWKWLWMWQWeWfWgWhWkimmeridgianGWIWQWgWhWlateW WWWWWW$W,W1W9W:WEWGWHWIWJWNWOWPWQW_WaWbWcWeWfWgWhWlWmWrW~WlatecretaceousV VVV,V1V9V:V~V€tATsBSitkalidak Formation, undividedC#Tertiary, Eocene to Early OligoceneDSitkalidak Formation, undividedGKD006H63IKodiakJ SedimentaryK740€uATslB#Sitkalidak Formation, less deformedC#Tertiary, Eocene to Early OligoceneD#Sitkalidak Formation, less deformedGKD006H64IKodiakJ SedimentaryK740€vATsmB#Sitkalidak Formation, more deformedC#Tertiary, Eocene to Early OligoceneD#Sitkalidak Formation, more deformedGKD006H65IKodiakJ SedimentaryK740€wATgdB GranodioriteCTertiary, PaleoceneD GranodioriteGKD006H66IKodiakJIgneousK1320€xATgsB5Ghost Rocks Formation, sandstone-rich unit, undividedCTertiary, early PaleocenesitkalidakformationoffscrapeddepositspVqVsitkalidakformationslope-basindepositsoVsitkalidakformationundividedtVVsitkinakW.W4WnWsWsitkinakformationV.V4VnVslope-basinoWsnugQWgWsomeWWWstadeAWBWstreamWWWWsurficialWWW&W2W;WRWWWWWsurficialdepositsVVV&V2V;VVVVVVterrace>WWWkWterraneWtrinitymWsWtugidakWtugidakformationVultramaficW!Wundivided@WRWZWtWxWyWWWWWWunitxWyWWWWWuyakWW W!WWuyakcomplexVVuyakcomplexgabbroicandultramaficrocksV!Vuyakformation Vvolcanic WW+W8WDWOW[W^WaWjW|W}WWvolcanicandshallowintrusiverocksDVvolcanicrocksOV[V^VjVVvolcanicrocksofbarrierrangeaV€x€yATgaB5Ghost Rocks Formation, argillite-rich unit, undividedCTertiary, early PaleoceneAConsists of thick sections of argillite and local massive sandstone and chert-rich pebble conglomerate. Tuff beds. Limestone containing pelagic forams locally occurs at depositional contacts with pillow basalt. Unit typically occurs to southeast of sandstone-rich unit.EOPelagic forams yielding early Tertiary and Late Cretaceous ages (3 collections)GKD006H68IKodiakJ SedimentaryK962€zATgcBGhost Rocks Formation, coherentCTertiary, early PaleoceneDGhost Rocks Formation, coherentGKD006H69IKodiakJ SedimentaryK960€{ATgmBGhost Rocks Formation, melangeCTertiary, early PaleoceneDGhost Rocks Formation, melangeGKD006H601IKodiakJ TectoniteK1780€|ATgvaB>Ghost Rocks Formation, andesitic volcanic and hypabyssal rocksCTertiary, early PaleoceneD>Ghost Rocks Formation, andesitic volcanic and hypabyssal rocksGKD006H602IKodiakJIgneousK1150€}ATgvb€xAMassive 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 are also interbedded on the Aiulik Peninsula.GKD006H67IKodiakJ SedimentaryK961ghostrocksformationsandstone-richunitundividedxVVVglaciation?W@WAWBWCWZWglacierXWgraniticiWWgraniticplutonicrocksiVgraniticrocksVgranodioritewgranularWWWgranularintrusiverocksVVVgravelWWWWharborQWgWhemlockEW_WhemlockconglomerateEV_VherendeendWherendeenformationdVRghostrocksformationcoherentzVVghostrocksformationmelange{VGghostrocksformationandesiticvolcanicandhypabyssalrock|V€}B=Ghost Rocks Formation, basaltic volcanic and hypabyssal rocksCTertiary, early PaleoceneApTholeiitic basalt occurring within both sandstone- and argillite-rich units of the 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)pGKD006H603IKodiakJIgneousK1151€~AKkBKodiak FormationCLate CretaceousDKodiak FormationGKD006H604IKodiakJ SedimentaryK1917€ATsBSitkalidak Formation, undividedC#Tertiary, Eocene to Early OligoceneDSitkalidak Formation, undividedGTI005H63ITrinity IslandsJ SedimentaryK740€ATgcBGhost Rocks Formation, coherentCTertiary, early PaleoceneDGhost Rocks Formation, coherentGKG006H69IKaguyakJ SedimentaryK960€ATgaB5Ghost Rocks Formation, argillite-rich unit, undividedCTertiary, early PaleoceneBghostrocksformationV0VVghostrocksformationandesiticvolcanicandhypabyssalrock|Vghostrocksformationargillite-richunitundividedyVVVghostrocksformationbasalticvolcanicandhypabyssalrocks}VghostrocksformationcoherentzVVghostrocksformationmelange{VgabbroW!WWWWWgabbroicW!WWgenerallyWWWWWWWgeologicalPWghostiWzW{W|WWWWWHtertiaryWWWWWWWWWWWorFWiWlWmWWWWoxfordianGWHWQWeWfWgWWWpaleoceneW WWW*W+W0W7W8W`WwWxWyWzW{W|W}WWWWWWWpaleozoicWWWpermianWWjpermianearlyguadalupianVpleistocene;W=W>W@WAWBWCWDWSWTWVWWWZW[WWWWWWWplioceneWWFW^WbWlWplioceneandlatemiocenebVplioceneandormioceneFVquaternary&2<@WAWBWCWRUXZW^WkWWWWquaternaryandpliocene^Vquaternarypleistocene@VAVBVCVZVquaternarypleistoceneandrecentVVVVrecentWWWWWWW W W W WWWW'W(W)W*W+W-W.W/W0W3W4W5W6W7W8WaWiWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}WS€€ATgaB5Ghost Rocks Formation, argillite-rich unit, undividedCTertiary, early PaleoceneAConsists of thick sections of argillite and local massive sandstone and chert-rich pebble conglomerate. Tuff beds. Limestone containing pelagic forams locally occurs at depositional contacts with pillow basalt. Unit typically occurs to southeast of sandstone-rich unit.EOPelagic forams yielding early Tertiary and Late Cretaceous ages (3 collections)GKG006H68IKaguyakJ SedimentaryK962€ATgsB5Ghost Rocks Formation, sandstone-rich unit, undividedCTertiary, early Paleocene€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 are also interbedded on the Aiulik Peninsula.GTI005H68ITrinity IslandsJ SedimentaryK962€€ATgsB5Ghost Rocks Formation, sandstone-rich unit, undividedCTertiary, early PaleoceneAConsists of thick sections of argillite and local massive sandstone and chert-rich pebble conglomerate. Tuff beds. Limestone containing pelagic forams locally occurs at depositional contacts with pillow basalt. Unit typically occurs to southeast of sandstone-rich unit.EOPelagic forams yielding early Tertiary and Late Cretaceous ages (3 collections)GTI005H67ITrinity IslandsJ SedimentaryK961€BSurficial depositsC QuaternaryDMConsist of glacial and stream deposits inland and beach sediments along coastGKR006H600IKarlukJUnconsolidatedK100€AQvBVolcanic rocksCHolocene and Pleistocene€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 are also interbedded on the Aiulik Peninsula.GKG006H67IKaguyakJ SedimentaryK961YearlycretaceousbarremianandhauteriviandVearlyeoceneandpaleocene`VearlyjurassicMVearlytertiaryVeoceneWW W W)W+W/W0W5W6W8W`WiWoWpWqWtWuWvWWWguadalupianWhauteriviandWholocene;W=W>W?DWSWTWVWWWY[W\]WWholoceneandpleistocene;V=V>VDVSVTVVVWV[VVVjurassic"#%GWHWIWJWKWLWMWQWeWfWgWhWWWkimmeridgianGWIWQWgWhWlateW WWWWWW$W,W1W9W:WEWGWHWIWJWNWOWPWQW_WaWbWcWeWfWgWhWlWmWrW~WWWWWWWWlatecretaceousV VVV,V1V9V:V~VVVVVk/massivedark-greentoblackvolcanicbrecciaagglomerateandjVmassivesandstonebedsandlesseramountsofargilliteandmxVVVmassivetothick-beddedmediumtocoarse-graineddark-greenKVmaterial`WWWWWmaterialsWWWmaximumWmaycWWWWmeasuredPW`WcWmeasuredthicknessismorethan1200mofdark-graytopale-cVmediumWWGWHWKWNW`WbWdWxWWWWmediumtocoarse-grainedequigranulargranodioritetoquartzbVmediumtodark-olive-grayslightlycalcareoustosiliceousaHVmediumtothick-beddeddark-graylimestoneandthintoshalyNVmediumtothicklybeddedarkosicwackeandshalehavingoccaVmediumtothicklybeddedarkosicwackeandshalewithoccaisV{>consistofglacialandstreamdepositsinlandandbeachsediVVconsistingW WWW$W'W-WconsistsWWWW W W WWWWW'W+W,W-W0W1W8W9W:W;WGWIWJWPWQW`WfWgWhWyWWWWWWW€€AKuB Uyak ComplexC CretaceousDLithologically chaotic assemblage of deep-sea rock types. Includes argillite and gray chert, massive arkosic sandstone, pillowed and massive greenstone, rhythmically bedded radiolarian chert, minor limestone, and tuffaceous argillite.GKR006H450IKarlukJ TectoniteK2190€AJnnB4Naknek Formation -- Northeast Creek Sandstone memberCLate Jurassic; OxfordianAType 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. Sandstone is typically thick bedded and crossbedded and contains magnetite laminae and thin beds of conglomerate. Fossils are uncommon in unit although carbonaceous debris is common locally. Depositional environment is mainly nonmarine. Some sand beds are channeled with lag gravel at bases of channBelsEMFossils are uncommon in unit although carbonaceous debris is common locally. GKR004H512€ASAndesite, dacite, and leucobasalt lava flows, volcanic breccia, lahar deposits, and debris-flow 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 more of rocksSGKR004H150IKarlukJIgneousK300€IKarlukJ SedimentaryK3012€AJncB.Naknek Formation -- Chisik Conglomerate memberCLate Jurassic (Oxfordian)ALimited to northern half of Alaska Peninsula, unit is composed of 614 m of massive to thick-bedded conglomerate and interbedded, crossbedded, clean quartzose sandstone. Clasts range in size from maximum of 120 cm at bottom to 15 cm at top. Clast composition is 30 percent granitic rocks, 30 percent quartzite, 20 percent metavolcanic rocks, 10 percent schist, and 10 percent chert and quartz. Clasts are well-rounded and commonly decrease in size stratigraphically upward within each lithic Binterval of member. Lower contact is unconformity with Shelikof Formation; upper contact is conformable and gradational with Northeast Creek Sandstone MemberGKR004H511IKarlukJ SedimentaryK3016€ATghBGhost Rocks FormationCTertiary, Paleocene to EoceneDrConsists of zeolite-bearing tuffaceous sandstone, basalt, claystone, sandstone, tuff, and graded beds (wildflysch)enaknekformationchisikconglomeratememberVnaknekformationconglomeratememberJVnaknekformationindecisioncreeksandstonememberIVhVnaknekformationnortheastcreeksandstonememberfVVnaknekformationsandstonememberGVnaknekformationsiltstonememberHVnaknekformationsnugharborsiltstonememberQVgVpnarrow@sand@sedimentary@sitkalidak@sitkalidakformationoffscrapeddeposits@surficialdepositsundivided@@bajocian@earlycretaceousbarremianandhauterivian@latecretaceousmaestrichtian@middlepermian@or@tertiary@tertiaryearliestmioceneorlateoligocene@tertiaryoligocenetoeocene@toarcian@astructurallycomplexgroupofrocksofgreatlithologicdi@abandoned@about@along@walthough@andesite@aaverage@cbases@`beaches@bristol@mcharacterized@clast@complete@consistofglacialandstreamdepositsinlandandbeachsedi@consistsof1500mofofinterbeddedsandstoneandsiltstone@{consistsofaverage1mthickgradedbedsequencesofthick9|consistsofgradedbedsequencesanaverage1-m-thickofthi@crossite-epidote@dacitic@ €GKG003H261IKaguyakJ TectoniteK1780€BSurficial depositsC QuaternaryDNConsists of glacial and stream deposits inland and beach sediments along coastGAF004H100IAfognakJUnconsolidatedK100€AlsBLandslide depositsC QuaternaryA8Landslide deposits ranging from nonsorted, nonstratifed, coarse angular rubble forming lobste masses at base of moderately steep to steep slopes. Where derived from bedrock, deposits are chiefly coarse angular blocks; where derived from glacial deposits, deposits are mixture of silt, sand, gravel, and boulders8GAF006H108IAfognakJUnconsolidatedK108€AcvdBDomesCHolocene and PleistoceneDlDacite at Snowy Mountain, Mount Cerberus, Falling Mountain, and at Kaguyak Crater and rhyolite at NovaruptaGAF006H681IAfognakJIgneousK401€ATgBGranitic rocksCearly TertiaryDOInferred granitic rocks based on aeromagnetic evidence and unconfirmed reports.GAF005H801IAfognakJIgneousK1320MQ€AKkBKodiak FormationsurficialdepositsundividedRVtalkeetnaMWtalkeetnaformationMVterrace>WWWkWterraneWtertiaryWtriassicWWWtrinitymWsWtugidakWtugidakformationVultramaficW!WWundivided@WRWZWtWxWyWWWWWWunitxWyWWWWWupperWWWWuyakWW W!WWWWuyakcomplexVVVuyakcomplexgabbroicandultramaficrocksV!VVuyakformation Vvolcanic WW+W8WDWOW[W^WaWjW|W}WWvolcanicandshallowintrusiverocksDVvolcanicrocksOV[V^VjVVvolcanicrocksofbarrierrangeaV`mYbeaches=WVWbecausejWbecharofFWbWbecome`WbedWW WWW,W1W9W:WbeddedWWGWIWNW`WcWdWfWhWWWWWbedrockUWWbedsWWW W W WWWWW W'W)W+W-W/W0W5W6W8WHWQWfWgWxWyWWWWWWWWbeenKWQWcWgW}WbelowWQWgWbeneathWWbetween>WFWWWiWbiotiteIWbWhWiWblack W[WjWWblock;WDWblocksUW\WWbodiesWWFWbWbombs[Wboth}WbottomWbouldersWboumaWxWWWWbraidednWbrecciaWWOWPW[WaWjWWbreccialavaflowssillsandlocalpyroclasticandepiclastiaVbrecciatedPWbrieflyjWdacitic]Wdaciticorrhyoliticvitrophyreshavingplagioclasepyroxene]VdarkMW`Wdark-grayMWNWQWcWfWgWWdark-greenKWjWdark-olive-grayHWdark-yellowish-brownQWgWdataOWiWjWdebris;WDW`WWdebris-flow[WWdecreaseWdeepKWQWgWdeep-seaWW!WoWpWqWWWWdefinitejWdeformedWWoWpWqWuWvWdependingfWdepositedKWcWmWnWdepositionWoWpWqWxWWWdepositionalQWcWfWgWyWWWWdepositsWWW&W2W;W<W=W>WDWRWTWUWWWXW[W\W^WfWkWnWWWWWWWWWWWdepthQWgWdepthsmWderived}WWdescendingPWdescribeddWdettermanKWPWQW[WbWcWeWfWgWGinferredWinferredgraniticrocksbasedonaeromagneticevidenceanduVinformalWKWinformalunitconsistingprincipallyofmediumtothick-beddVinlandWWWWinsetPWjWinterbeddedWWJWNWOWoWpWqWxWWWWinterbedsWWEWMW_W €CLate Cretaceous, MaestrichtianDMedium to thickly bedded arkosic wacke and shale with occaisional beds of pebbly conglomerate. Flute casts and complete Bouma sequencesGAF004H417IAfognakJ SedimentaryK1917MQ€AKsgBMainly Upper Cretaceous rocksCLate CretaceousDhSlate, argillite, graywacke, and conglomerate, thoroughly indurated, and generally highly metamorphosed.GAF010H417IAfognakJ MetamorphicK1917MQ€AKuB Uyak ComplexC CretaceousDLithologically chaotic assemblage of deep-sea rock types. Includes: argilite and gray chert containing minor tuff; massive arkosic sandstone; pillowed and massive greenstone; bedded radiolarian chert; minor limestone; and tuffaceous argillite.GAF004H450IAfognakJ TectoniteK2190€AKuuB+Uyak Complex- Gabbroic and ultramafic rocksC CretaceousDLithologically chaotic assemblage of deep-sea rock types. Gabbroic and ultramafic rock, including layered gabbro, clinopyroxenite, dunite, and plagioclase peridotite.GAF004H470IAfognakhslightlyWHWsliicieousWWWslopesWsmallWWEW[W_WiWsmallalteredgraniticplutonsthatintrudetheghostrocksiVsmall-scalefWsmokes\WsnowyWsnugfWsomeQWfWgWWWWWsorted=W>WVWWWsourceEW_W}WsoutheastaWiWyWWWspatter[WsporadicbWspurreWstadeAWBWsteep[WWsteeplyWWWstocksbWstrataPWstratified=W>WVWWWstratigraphicallyWstreamWnWWWWstrikeWstrongdWstructurallyWWjWWWWstructurejWstudyjWsubangularSWTWsubdividedeWsubdivisionsKWsubequal`WsuggestjWsurfacesdW _€J TectoniteK2197€AQmgB%Present stream gravel, sand, and siltC"Quaternary, Pleistocene and RecentDMLow terrace gravel; alluvial fans; beach deposits. Glacial morainal materialGAF010H1000IAfognakJUnconsolidatedK100N1000€ATmsB!Marine sandstones of Narrow PointDIMarine sandstones of Narrow Point, mildly folded and moderately induratedGKD007IKodiakJ SedimentaryK580€ATssBMFresh-water sandstone, shale, and conglomerate, locally containing coly seamsDFresh-water sandstone, shale, and conglomerate, locally containing coly seams. Generally steeply dipping and well indurated; locally highly contorted. (Includes Sitkinak and Sitkalidak Formations)GKD007IKodiakJ SedimentaryK640€AKsgBMainly Upper Cretaceous rocksCLate CretaceousDhSlate, argillite, graywacke, and conglomerate, thoroughly indurated, and generally highly metamorphosed.GKD007H417IKodiakJ MetamorphicK1917MQ€AsgsBIMainly Triassic and Jurassic rocks possibly some Paleozoic or older rocksrocksufewW W W'W-WiWfineFWIWLWSWTW`WcWfWhWWfinetomedium-grainedequigranularquartzdioritequartzmoFVfine-grainedGWnWfirst-cycleIWhWfiveeWflows;WDWNWOW[W^WaWjWWfluteWcWWfluvialEW_WfoldedW#WWfoldsWforEWKW_WeWforamsyWWWform>WEWWW_WformationW WW W'W-WOWPW`WcWdWiWmWrWsWtWuWvWzW{W|W}W~WWWWformationis700mthickthelower2/3consistingofsandstonV V'V-VformationsWWformingUWWforms[WfossilsWfoundKW}WfracturedWfragmentsW W(W.W3W4WSWTW[WfreshIWhWfresh-waterWWfresh-watersandstoneshaleandconglomeratelocallycontainVVfreshlydWfromIWSWTWUW[W`WfWhWiWjW}WWWWWsandWWWWsandstoneGWIWKWfWhWWWWWsandstone-richxWWWsandstonesWschistW#WschistofkodiakislandV#VseamsWW_p€AsgsBIMainly Triassic and Jurassic rocks possibly some Paleozoic or older rocksCMesozoic and Paleozoic?es ellipsoidal lava with associated slate, thin-bedded chert and slate, calcareous slate, graywacke, and limestone, and their metamorphic equivalents, represented by greenstone schists, knotty schists resulting from the kneading together of slates with with chert, graywacke, and greenstone; crystalline limestone, calcareous and sliicieous schist, and mica schist. May include materials of a wide range of ages. InB%cludes Ghost Rocks and Uyak ComplexesGAF010IAfognakJ TectoniteK2190€AsgsBIMainly Triassic and Jurassic rocks possibly some Paleozoic or older rocksCMesozoic and Paleozoic?abandonedKWQastructurallycomplexgroupofrocksofgreatlithologicdiVVV€€ATKgBGranular intrusive rocksC#Latest Cretaceous or Early TertiaryD_Granular intrusive rocks, mainly quartz diorite, with some diorite, and minor amounts of gabbroGKD007IKodiakJIgneousK1200MQ€ATKgBGranular intrusive rocksC#Latest Cretaceous or Early TertiaryD_Granular intrusive rocks, mainly quartz diorite, with some diorite, and minor amounts of gabbroGAF010H1002IAfognakJIgneousK1200MQBGranular intrusive rocksC#Latest Cretaceous or Early TertiaryD_Granular intrusive rocks, mainly quartz diorite, with some diorite, and minor amounts of gabbroGKR009IKarlukJIgneousK1200MQ€AKsgBMainly Upper Cretaceous rocksCLate CretaceousDhSlate, argillite, graywacke, and conglomerate, thoroughly indurated, and generally highly metamorphosed.GKG007H417IKaguyakJ MetamorphicK1917MQ€AQmgB%Present stream gravel, sand, and siltC"Quaternary, Pleistocene and RecentDMLow terrace gravel; alluvial fans; beach deposits. Glacial morainal materialGKD007H1000IKodiakI€AA structurally complex group of rocks of great lithologic diversity. Includes ellipsoidal lava with associated slate, thin-bedded chert and slate, calcareous slate, graywacke, and limestone, and their metamorphic equivalents, represented by greenstone schists, knotty schists resulting from the kneading together of slates with with chert, graywacke, and greenstone; crystalline limestone, calcareous and sliicieous schist, and mica schist. May include materials of a wide range of ages. InB%cludes Ghost Rocks and Uyak ComplexesGKD007IKodiakJ TectoniteK2190€JUnconsolidatedK100N1000€AQmgB%Present stream gravel, sand, and siltC"Quaternary, Pleistocene and RecentDMLow terrace gravel; alluvial fans; beach deposits. Glacial morainal materialGKR009H1000IKarlukJUnconsolidatedK100N1000€AQmgB%Present stream gravel, sand, and siltC"Quaternary, Pleistocene and RecentDMLow terrace gravel; alluvial fans; beach deposits. Glacial morainal materialGKG007H1000IKaguyakJUnconsolidatedK100N1000€ATssBMFresh-water sandstone, shale, and conglomerate, locally containing coly seamsDFresh-water sandstone, shale, and conglomerate, locally containing coly seams. Generally steeply dipping and well indurated; locally highly contorted. (Includes Sitkinak and Sitkalidak Formations)GKG007IKaguyakJ SedimentaryK640€AKsgBMainly Upper Cretaceous rocksCLate CretaceousDhSlate, argillite, graywacke, and conglomerate, thoroughly indurated, and generally highly metamorphosed.GKR009H417IKarlukJ MetamorphicK1917MQ€AsgstertiaryWWWWW W W W WWWW'W(W)W*W+W-W.W/W0W3W4W5W6W7W8WaWiWlWmWnWoWpWqWrWsWtWuWvWwWxWyWzW{W|W}W!8€BIMainly Triassic and Jurassic rocks possibly some Paleozoic or older rocksCMesozoic and Paleozoic?AA structurally complex group of rocks of great lithologic diversity. Includes ellipsoidal lava with associated slate, thin-bedded chert and slate, calcareous slate, graywacke, and limestone, and their metamorphic equivalents, represented by greenstone schists, knotty schists resulting from the kneading together of slates with with chert, graywacke, and greenstone; crystalline limestone, calcareous and sliicieous schist, and mica schist. May include materials of a wide range of ages. InB%cludes Ghost Rocks and Uyak ComplexesGKR009IKarlukJ TectoniteK2190€B#Mainly Tertiary sandstone and shaleCTertiaryD#Mainly Tertiary sandstone and shaleGTI006ITrinity IslandsJ SedimentaryK500BMcHugh ComplexC CretaceousDWeakly metamorphosed siltstone, graywacke, arkose and conglomeratic sandstone; greenstone (mostly basaltic), chert and argilliteGAF011H1450IAfognakCoffshorejWoldermWolive-brownGWolive-grayLWQWfWgWWolive-graytogreenmedium-beddedfinetomedium-grainedgraLVonWW=WPWQWVWdWeWfWiWjWxWWWWonlyjWorTW[W\W]WWoral[WorderPWoriginnWoriginaljWzthin-sectionsiW fromWhthanQWcWgWthatWW>WEWQWUWWW[W_W`WgWiWtheW W W'W-WPW[WiWmWxW}WWWWWWtheirWWWthemWWiWtheseOW^WiWjW}WtheyIW`WdWhWiWthickWWWW W W WWW W'W)W,W-W/W1W5W6W9W:WGW[W`WfWyWWWWthick-beddedWWJWKWNWWthicklyWWthicknesscWjWthinW WWWWW W$W,W1W9W:WHWIWMWNWPWQW`WcWdWfWgWhWWthin-beddedGWQWfWgWxWWWWWWW! p€J TectoniteK2190€BSurficial depositsC QuaternaryDNConsists of glacial and stream deposits inland and beach sediments along coastGAF005H100IAfognakJUnconsolidatedK100€AQs?BSurficial depositsC QuaternaryDUndivided surficial depositsGKD004H100IKodiakJUnconsolidatedK100@GafÃ!&2;RkWÃ#XÃ$?YÃ$`@ZÃ$AÃ$BÃ*CÃAD[ÃB \ÃQ ]ÃV^ÃfÃg`lÃi '-rÃi msÃvE_Ãw (.34nà )/56opqtuvÃ`Ãzà xÃ0yÄ!baÄ"a|Ä"b}Ä#aFbÄ$iÄ$1*7wÄ( +08{Ä*( ,19:~Ä*fcÄ2AÄ2adÄ2 Ä2!ÄA!eÄA#GfÄA$HQgÄA%IhÄA'JÄA1KÄBLÄCaMÄG!#ÄQ1NPÄRa$ÄSAOÄSQÄSaÄT!"%ÄhAÄi!jfweaklymetamorphosedsiltstonegraywackearkoseandconglomeVweatherdWweatheringdWQ€ATKgBGranular intrusive rocksC#Latest Cretaceous or Early TertiaryD_Granular intrusive rocks, mainly quartz diorite, with some diorite, and minor amounts of gabbroGKR009IKarlukJIgneousK1200MQ€AKsgBMainly Upper Cretaceous rocksCLate CretaceousDhSlate, argillite, graywacke, and conglomerate, thoroughly indurated, and generally highly metamorphosed.GKG007H417IKaguyakJ MetamorphicK1917MQ€AQmgB%Present stream gravel, sand, and siltC"Quaternary, Pleistocene and RecentDMLow terrace gravel; alluvial fans; beach deposits. Glacial morainal materialGKD007H1000IKodiakBC  Bv='oDdWDX\aWta uN qn  EX  DX  mCbu$  avdx# bv . f   2d "+$ &ZY  A1RPTHRolyNAMEWSPCNAMEAKodiakdescrip.FP5RPTHAKODIAKDESCRIP.FP5RolyAWSPCAE:\E.1\DB-5\Kodiak\"Ã!`SÃ!pTÃ!WÃ#XÃ$?YÃ$`@ZÃ$AÃ$BÃ*CÃAD[ÃB \ÃQ ]ÃV^ÃaÃfÃg`lÃi '-rÃi msÃuÃvE_Ãw (.34nà )/56opqtuvÃ`Ãzà xÃ0yÄ!baÄ"a|Ä"b}Ä#Ä#aFbÄ$iÄ$1*7wÄ( +08{Ä*( ,19:~Ä*fcÄ2AÄ2adÄ2 Ä2!ÄA!eÄA#GfÄA$HQgÄA%IhÄA'JÄA1KÄBLÄCaMÄG!#ÄQ1NPÄRa$ÄSAOÄSQÄSaÄT!"%ÄhAÄi!j€AKJmBMcHugh ComplexC CretaceousDWeakly metamorphosed siltstone, graywacke, arkose and conglomeratic sandstone; greenstone (mostly basaltic), chert and argilliteGAF011H1450IAfognak   @!WÃ#XÃ$?YÃ$`@ZÃ$AÃ$BÃ*CÃAD[ÃB \ÃQ ]ÃV^ÃfÃg`lÃi '-rÃi msÃvE_Ãw (.34nà )/56opqtuvÃ`Ãzà xÃ0yÄ!baÄ"a|Ä"b}Ä#Ä#aFbÄ$iÄ$1*7wÄ( +08{Ä*( ,19:~Ä*fcÄ2AÄ2adÄ2 Ä2!ÄA!eÄA#GfÄA$HQgÄA%IhÄA'JÄA1KÄBLÄCaMÄG!#ÄQ1NPÄRa$ÄSAOÄSQÄSaÄT!"%ÄhAÄi!j  @