Wilson, Frederic H. Hults, Chad P. Schmoll, Henry R. Haeussler, Peter J. Schmidt, Jeanine M. Yehle, Lynn A. Labay, Keith A. 2009 version 1.0 vector digital data U.S. Geological Survey Open-File Report OFR 2009-1108 http://pubs.usgs.gov/of/2009/1108 This data set creates an updated map of the Cook Inlet region, located at northern part of the Gulf of Alaska. Cook Inlet fills a largely Tertiary basin lying between two accreted belts of Mesozoic and younger rocks. Largely continental Tertiary sedimentary rocks filling the basin are important oil and gas resevoirs. Mesozoic and Cenozoic plutonic rocks of the Alaska-Aleutian Range batholith and the Early Jurassic Talkeetna magmatic arc bound the west and northern sides. The eastern and southern sides are bounded by late Cretaceous accretionary flysch and associated melange. This data set is a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Surveys and Analysis (S&A) project, whose goal is to compile geologic geochemical, geophysical, and other data. This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this series has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic maps to field mapping. 2009 publication date Complete As needed -155.0 -148.0 62.75 58.5 None geology Geographic names information system (GNIS) Alaska Gulf of Alaska Cook Inlet Susitna River valley Kenai Peninsula Alaska-Aleutian Range Talkeetna Mountains None None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. U.S. Geological Survey, Alaska Science Center Frederic H. Wilson Geologist mailing address

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7445 fwilson@usgs.gov This data set was prepared by Frederic H. Wilson, Chad Hults, and Keith Labay. Data set was created using ESRI ARC/Info version 7.2.1 on a Unix platform and ArcGIS version 9.3. There were many types of source materials of varying scale, used to compile this data set. Sources include previously published maps, unpublished mapping, and air photo interpretation. The dates of the mapping range from present to 1960's. Vector features were digitized on screen or from a large digitizing tablet. The digital data has been checked, and the geologic map has been technically reviewed and edited. Each geology coverage is a network coverage containing attributed arcs and polygons. Each polygon has a coded attribute designating the mapped geologic unit. Faults, stratigraphic contacts, and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (fault, dike, lineation, etc.) The complete data set consists of 33 different GIS coverages, 11 geology coverage, 8 fold coverages, 9 lineation coverages, and 5 dike coverages. There is also an associated relational database of geologic units. Each coverage has the extent of a 1:250,000-scale quadrangle. A graphic representation of the database and a report with complete geologic unit descriptions is provided in .pdf format. This data is presented for use at a nominal scale of 1:250,000. Line work for the geology compilation was hand digitized from material of various media and scale. The arcs and polygons have attributes. The spatial databases are provided in UTM projection and geographic coordinates. The native ARC/Info coverages have been exported to an interchange file format, and also converted to shape files. 2009 U.S. Geological Survey, Alaska Science Center Frederic H. Wilson Geologist mailing address

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7445 fwilson@usgs.gov Vector Universal Transverse Mercator 5 0.9996 -153.0 0.0 500000 0 coordinate pair 0.001 0.001 meters Universal Transverse Mercator 6 0.9996 -147.0 0.0 500000 0 coordinate pair 0.001 0.001 meters North American Datum of 1927 Clarke 1866 6378206.4 294.9787 polygons Characteristics of the polygon features in the geology coverages are coded in the polygon attribute table. The table <cov>.pat includes the following items: CLASS, QCLASS, LITH2 (not used), SOURCE, NSACLASS, NSAMOD, LABEL, MIN_AGE, and MAX_age. this data set NSACLASS NSACLASS is a positive integer value (4 5 B) item in the polygon attribute table. Values range discontinuously from 98 to 9322. NSACLASS is a numeric code for the geologic unit. This data set represents a generalized map, thus it is possible that a geologic unit is made of multiple NSACLASS values. Each NSACLASS on the Cook Inlet map matches with geologic unit labels in LABEL and has a minimum (MIN_AGE) and maximum (MAX_AGE) range, given in million of years (my). The geologic units for NSACLASS values of polygons found only outside the Cook Inlet map area are from the state geologic map compilation, and only briefly described. Supplemental attribute tables included with this data set contain additional descriptive information of each geologic unit. A user may use items SOURCE and CLASS to retrieve information about the original units from which these generalized units were formed. NOTE: Because of limitations of common GIS fonts, the letters 'Tr', 'Mz', 'Pa', and 'Pz' are substituted for the standard symbols for 'Triassic', 'Mesozoic', 'Pennsylvannian', and 'Paleozoic'. this data set 98 bu - bedrock, unknown 99 bu - bedrock, unknown 100 Qs - Surficial deposits, undivided (Quaternary) 101 ice 102 water 103 Qtf - Modern tidal flat and estuarine deposits (Holocene) 105 Qat - Alluvium along major rivers and in terraces (Holocene) 106 Qaf - Alluvial fan deposits (Holocene) 107 Qlc - Landslide and colluvial deposits (Holocene and Upper Pleistocene) 108 Qlc - Landslide and colluvial deposits (Holocene and Upper Pleistocene) 109 Qgo - Glacial deposits, outwash in plains, valley trains, and fans (Upper Pleistocene) 110 Qat - Alluvium along major rivers and in terraces (Holocene) 111 Qgc - Glacial deposits, glacioalluvium (Upper Pleistocene) 112 Qsl - Lacustrine, swamp, and fine silt deposits (Quaternary) 113 Qsl - Lacustrine, swamp, and fine silt deposits (Quaternary) 114 Qat - Alluvium along major rivers and in terraces (Holocene) 115 Qb - Beach deposits (Quaternary) 116 Qes - Estuarine deposits (Holocene) 117 Qes - Estuarine deposits (Holocene) 119 Qd - Eolian deposits (Quaternary) 120 Qd - Eolian deposits (Quaternary) 122 Qsl - Lacustrine, swamp, and fine silt deposits (Quaternary) 123 Qgl - Glacial deposits; graciolacustrine deposits (Holocene and Upper Pleistocene) 124 Qgl - Glacial deposits; glaciolacustrine deposits (Holocene and Upper Pleistocene) 125 Qm - Glacial deposits, undivided (Quaternary) 126 Qm - Glacial deposits, undivided (Quaternary) 127 Qm - Glacial deposits, undivided (Quaternary) 128 Qlc - Landslide and colluvial deposits (Holocene and Upper Pleistocene) 129 ice contact deposits 130 Qhg - Glacial deposits; young moraine deposits (Holocene) 131 Qho - Glacial deposits; younger outwash deposits (Holocene) 135 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 136 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 137 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 138 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 139 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 140 Qgo - Glacial deposits; outwash in plains, valley trains, and fans (Upper Pleistocene) 141 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 145 glacial deposits of the Brooks Lake glaciation, drumlin 146 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 147 Qg - Glacial deposits; major moraine and kame deposits (Upper Pleistocene) 148 Qs - Surficial deposits, undivided (Quaternary) 150 Qge - Glacial deposits; glacioestuarine deposits (Upper Pleistocene) 151 Qbc - Glacial deposits; Bootlegger Cove Formation (Upper Pleistocene) 170 Qdl - Deltaic deposits (Quaternary) 190 Qog - Older glacial deposits (Middle or Lower Pleistocene) 191 glacial deposits of the Mak Hill glaciation, drumlin 194 Qog - Older glacial deposits (Middle or Lower Pleistocene) 195 Qog - Older glacial deposits (Middle or Lower Pleistocene) 200 Qog - Older glacial deposits (Middle or Lower Pleistocene) 201 Qog - Older glacial deposits (Middle or Lower Pleistocene) 210 glacial deposits of unnamed older glaciation, outwash 215 Qs - Surficial deposits, undivided (Quaternary) 275 Qm - Glacial deposits, undivided (Quaternary) 295 Qs - Surficial deposits, undivided (Quaternary) 300 Qv - Volcanic rocks, undivided (Quaternary) 305 Qhv - Volcanic rocks (Holocene) 306 volcanic domes (Holocene and Pleistocene) 310 Qv - Volcanic rocks, undivided (Quaternary) 311 Qv - Volcanic rocks, undivided (Quaternary) 312 Qdf - Volcanic; debris-flow deposits (Holocene) 313 Qdf - Volcanic; debris-flow deposits (Holocene) 314 Qdf - Volcanic; debris-flow deposits (Holocene) 401 Qvd - Dacitic to rhyolitic domes (Holocene) 402 Qad - Andesite and dacite domes (Pleistocene) 450 QTv - Old volcanic rocks, undivided (Pleistocene or Pliocene) 460 QTv - Old volcanic rocks, undivided (Pleistocene or Pliocene) 500 Tsu - Sedimentary rocks, undivided (Tertiary) 540 Tks - Sterling Formation (Pliocene and Miocene) 545 Tkb - Beluga Formation (Miocene) 560 Tkn - Kenai Group, undivided (Pliocene to Oligocene) 600 Tkt - Tyonek Formation (Miocene and Oligocene) 630 Tkh - Hemlock Conglomerate, undivided (Oligocene) 640 coal-bearing rocks 650 Tkh - Hemlock Conglomerate, undivided (Oligocene) 670 Tts - Tsadaka Formation (Miocene or Oligocene) 790 Tsadaka and Wishbone Formations, undivided 795 Tvs - Volcaniclastic sedimentary rocks (Eocene or younger) 850 Tcl - Copper Lake Formation, undivided (lower Eocene and Paleocene?) 855 Twf - West Foreland Formation (Eocene and Paleocene) 870 Tw - Wishbone Formation (Eocene) 890 Tar - Arkose Ridge Formation (lower Eocene and upper Paleocene) 900 Tch - Chickaloon Formation (lower Eocene and upper Paleocene) 950 Orca Group, sedimentary rocks, undivided 951 Orca Group, sedimentary and volcanic rocks, undivided 952 Conglomerate of the Orca Group 1000 Tvu - Tertiary volcanic rocks, undivided (Tertiary) 1003 mafic to intermediate flows 1011 TKd - Dikes and sills (Tertiary to Cretaceous) 1012 TKd - Dikes and sills (Tertiary to Cretaceous) 1025 Tb - Basaltic volcanic rocks (Pliocene) 1030 Gibralter Lake Tuff 1031 Tpg - Gibralter Lake Tuff (Pliocene? to Oligocene?) 1051 volcanic rocks of Barrier Range (late Tertiary) 1070 Tmf - Tuffaceous felsic volcanic rocks (Eocene?) 1081 Tmv - Paleogene volcanic rocks, undivided (Oligocene and Eocene) 1082 Tmb - Basalt and andesite (Oligocene and Eocene) 1083 volcanic rocks north of Naknek Lake, andesite and dacitic flows and breccias 1087 Tmb - Basalt and andesite (Oligocene and Eocene) 1103 Tem - Mafic volcanic rocks (Eocene) 1121 Tfv - Felsic volcanic and sub-volcanic rocks (Eocene) 1135 Orca Group, volcanic rocks, undivided 1136 pillow basalt 1137 sheeted dikes 1170 Tpv - Intermediate to mafic volcanic rocks (Paleocene) 1200 Ti - Intrusive rocks, undivided (Tertiary) 1203 intrusive rocks (Tertiary) 1205 Ti - Intrusive rocks, undivided (Tertiary) 1250 Tpi - Intermediate intrusive rocks (Pliocene and latest Miocene) 1270 granitic rocks (Tertiary) 1273 Toegr - Granitic rocks (Oligocene and late Eocene) 1275 Toegr - Granitic rocks (Oligocene and late Eocene) 1290 Toegr - Granitic rocks (Oligocene and late Eocene) 1292 Foraker pluton (Eocene) 1293 Miners Bay pluton 1294 gabbro or gabbro diorite 1300 Toegr - Granitic rocks (Oligocene and late Eocene) 1301 TKd - Dikes and sills (Tertiary to Cretaceous) 1320 Tpgr - Granitic rocks of Paleocene age (Paleocene) 1325 Ti - Intrusive rocks, undivided (Tertiary) 1330 Thg - Hypabyssal granitic rocks (Paleocene?) 1340 Tpgr - Granitic rocks of Paleocene age (Paleocene) 1350 Tgd - Biotite-hornblende-granodiorite (Paleocene) 1360 Tpd - Biotite diorite (Paleocene) 1374 gabbro and diorite 1375 ultramafic rocks 1380 Tgn - Gabbronorite (Oligocene? or Eocene?) 1600 TKv - Older volcanic rocks, undivided (Paleocene to Upper Cretaceous) 1602 Tkd - Dikes and sills (Tertiary to Cretaceous) 1603 volcanic rock, light gray to pink rhyolite 1604 volcanic rocks, dacite 1615 TKft - Felsic tuff (early Tertiary or Cretaceous) 1635 basalt flows 1650 TKg - Granitic rocks, undivided (Paleocene to Late Cretaceous) 1655 TKg - Granitic rocks, undivided (Paleocene to Late Cretaceous) 1656 TKg - Granitic rocks, undivided (Paleocene to Late Cretaceous) 1658 TKg - Granitic rocks, undivided (Paleocene to Late Cretaceous) 1660 TKgd - Granodioritic rocks (Paleocene to Late Cretaceous) 1665 TKgd - Granodioritic rocks (Paleocene to Late Cretaceous) 1670 TKgb - Gabbroic rocks (Tertiary and (or) Cretaceous) 1710 TKc - Cataclastite (Eocene? and Cretaceous, metamorphic age) 1720 TKgg - Gneiss (Tertiary or Cretaceous, metamorphic age) 1780 volcanic and sedimentary rocks, undivided (Late Cretaceous and Tertiary) 1806 sandstone (Cretaceous) 1824 Kyh - Graywacke of the Yenlo Hills (Cretaceous?) 1917 Kkd - Kodiak Formation (Upper Cretaceous) 1920 continental sedimentary rocks (Tertiary, Paleocene) 1955 Kkg - Kaguyak Formation (Upper Cretaceous, Maastrichtian and Campanian) 1961 Ksm - Saddle Mountain section of Magoon and others (1980) (Upper Cretaceous, Maastrichtian) 1970 Kuskokwim Group, sandstone, siltstone, shale, and conglomerate 2010 Km - Matanuska Formation (Upper Cretaceous to upper Lower Cretaceous, Maastrichtian to Albian) 2100 sedimentary rocks, undivided (Early Cretaceous) 2120 Pedmar Formation (Early Cretaceous, Albian) 2130 Kcc - Cape Current terrane of Connelly (1978) (Upper Cretaceous) 2150 Khe - Herendeen Formation (Lower Cretaceous, Barremian and Hauterivian) 2175 Staniukovich Formation (Early Cretaceous) 2190 KMm - McHugh and Uyak Complexes, undivided (Cretaceous to Mississippian) 2192 graywacke, argillite, and shale (Silurian? to Middle Devonian) 2197 Uyak Complex, gabbroic and ultramafic rocks (Cretaceous) 2198 KJms - McHugh Complex, graywacke and conglomerate (Early Cretaceous to Early Jurassic, Pliensbachian) 2199 KTrmc - McHugh Complex, basalt and chert (Early Cretaceous to Middle Triassic, Albian to Ladinian) 2225 Kv - Intermediate and felsic volcanic rocks (Cretaceous) 2420 Kgd - Granodiorite (Late Cretaceous) 2430 Kqd - Quartz diorite (Late Cretaceous) 2440 TKgb - Gabbroic rocks (Tertiary and (or) Cretaceous) 2460 Kgr - Granite (Cretaceous) 2470 Kqms - Quartz monzonite, monzonite, and syenite (Late Cretaceous) 2480 Kgd - Granodiorite (Late Cretaceous) 2490 Kogr - Older granite (Cretaceous, Cenomanian) 2491 Kogr - Older granite (Cretaceous, Cenomanian) 2510 Kum - Ultramafic rocks (Late Cretaceous) 2540 diorite, quartz diorite, and syenodirite (Cretaceous) 2570 Klt - Leucotonalite and trondhjemite (Early Cretaceous, Albian to Barremian) 2680 Kivs - Metamorphosed intermediate volcanic and sedimentary rocks (Cretaceous) 2700 Kvs - Valdez Group, metasedimentary rocks, undivided (Upper Cretaceous) 2702 Valdez Group, interbedded volcanic and sedimentary rocks (Late Cretaceous) 2706 Kvv - Valdez Group, mafic metatuff (Upper Cretaceous) 2708 Kvm - Valdez Group, melange of Iceworm Peak of Kusky and others (1997) (Upper Cretaceous) 2710 Kvgs - Valdez Group, schist (Upper Cretaceous) 2750 Kps - Pelitic schist (Cretaceous?) 2850 KJs - Turbiditic sedimentary rocks of the Kahiltna flysch sequence (Cretaceous, Aptian and Valanginian or younger to Upper Jurassic?) 2852 flysch sequence, Late Cretaceous to Late Jurassic 2853 Ksf - Turbiditic sedimentary rocks of the Kahiltna flysch sequence; feldspathic sedimentary rocks (Cretaceous) 2854 Kes - Turbiditic sedimentary rocks of the Kahiltna flysch sequence; turbiditic sedimentary and volcanic rocks (Cretaceous, Aptian or younger) 2855 Koksetna River sequence, Jura-Cretaceous flysch, southern part of Kahiltna terrane 2890 pillow basalt (Early Cretaceous and Jurassic?) 2900 KJq - Quartz monzodiorite (Cretaceous? and (or) Jurassic?) 3010 Jn - Naknek Formation, undivided (Upper Jurassic, Tithonian to Oxfordian) 3011 Jnp - Naknek Formation, Pomeroy Arkose Member (Upper Jurassic, Kimmeridgian and Oxfordian?) 3012 Jnn - Naknek Formation, Northeast Creek Sandstone Member (Upper Jurassic, Oxfordian) 3013 Jnst - Naknek Formation, Snug Harbor Siltstone Member (Upper Jurassic, Kimmeridgian and Oxfordian) 3014 Jni - Naknek Formation, Indecision Creek Sandstone Member (Upper Jurassic, Tithonian and Kimmeridgian) 3015 Jnk - Naknek Formation, Katolinat Conglomerate Member (Upper Jurassic, Tithonian) 3016 Jnc - Naknek Formation, Chisik Conglomerate Member (Upper Jurassic, Tithonian to Oxfordian) 3020 Jcp - Chinitna Formation, Paveloff Siltstone Member (Middle Jurassic, Callovian) 3025 Jc - Chinitna Formation, undivided (Middle Jurassic, Callovian) 3030 Jct - Chinitna Formation, Tonnie Siltstone Member (Middle Jurassic, Callovian) 3140 Chinitna Formation and Tuxedni Group, undivided (Late Jurassic) 3180 Jt - Tuxedni Group, undivided (Middle Jurassic, lower Bathonian to Aalenian) 3181 Jtb - Tuxedni Group, Bowser Formation (Middle Jurassic, lower Bathonian and upper Bajocian) 3182 Jtt - Tuxedni Group, Twist Creek Siltstone (Middle Jurassic, Bajocian) 3183 Jtc - Tuxedni Group, Cynthia Falls Sandstone (Middle Jurassice, Bajocian) 3184 Jtf - Tuxedni Group, Fitz Creek Siltstone (Middle Jurassic, middle Bajocian) 3185 Jtg - Tuxedni Group, Gaikema Sandstone (Middle Jurassic, lower middle Bajocian) 3186 Jtrg - Tuxedni Group, Red Glacier Formation (Middle Jurassic, lower Bajocian to Aalenian) 3210 undivided marine sedimentary rocks (Cretaceous and Early Jurassic) 3250 Jtk - Talkeetna Formation, undivided (Lower Jurassic) 3251 Jtkh - Talkeetna Formation, Horn Mountain Tuff Member (Lower Jurassic) 3252 Jtkp - Talkeetna Formation, Portage Creek Agglomerate Member (Lower Jurassic) 3253 Jtkm - Talkeetna Formation, Marsh Creek Breccia Member (Lower Jurassic) 3265 Jp - Pogibshi formation of Kelley (1980), undivided (Lower Jurassic, Sinemurian to Hettangian and older?) 3380 Jtr - Alaska-Aleutian Range batholith (Jurassic phase), trondhjemite (Late Jurassic) 3401 granite (Jurassic) 3402 Jqm - Alaska-Aleutian Range batholith (Jurassic phase), granodiorite and quartz monzonite (Middle and late Early Jurassic) 3403 Jqd - Alaska-Aleutian Range batholith (Jurassic phase), quartz diorite, tonalite, and diorite (Jurassic) 3404 Jqd - Alaska-Aleuatian Range batholith (Jurassic phase), quartz diorite, tonalite, and diorite (Jurassic) 3405 Jqd - Alaska-Aleutian Range batholith (Jurassic phase), quartz diorite, tonalite, and diorite (Jurassic) 3407 Jmu - Alaska-Aleutian Range batholith (Jurassci phase), mafic and ultramafic plutonic rocks (Middle and late Early Jurassic) 3420 Jqd - Alaska-Aleutian Range batholith (Jurassic phase), quartz diorite, tonalite, and diorite (Jurassic) 3490 Jum - Mafic and ultramafic rocks, (Middle Jurassic or older?) 3525 Jeqd - Quartz diorite and tonalite (Middle and Early Jurassic) 3530 Jum - Mafic and ultramafic rocks, undivided (Middle Jurassic or older?) 3600 Jpmu - Plutonic and metamorphic rocks, undifferentiated (Middle to Early Jurassic, metamorphic age) 3610 Jsch - Greenschist and blueschist (Jurassic, metamorphic age) 3621 migmatite border zone of granodiorite (Jurassic) 3850 crystal tuff, argillite, chert, graywacke, and limestone, deep marine (Late Jurassic to Late Triassic?) 4000 TrPavs - Basaltic to andesitic metavolcanic and sedimentary rocks (Triassic?, Permian, Cisuralain, and Pennsylvanian?) 4019 Trpg - Port Graham formation of Kelley (1980) (Upper Triassic, Norian) 4020 Kamishak Formation (includes some volcanic rocks) (late Triassic) 4021 Limestone and basalt sequence (Late Triassic) 4022 Trku - Kamishak Formtaion, Ursus Member (Upper Triassic, Norian) 4023 Trkm - Kamishak Formation, Middle Member (Upper Triassic, Norian) 4024 Trkb - Kamishak Formation, Bruin Limestone Member (Upper Triassic, Norian) 4030 JTrlm - Talkeetna Formation, limestone and marble (Lower Jurassic or Upper Triassic?) 4031 JTrlm - Talkeetna Formation, limestone and marble (Lower Jurassic or Upper Triassic?) 4033 shale and limestone (Early Paleozoic?) 4050 conglomerate and volcanic sandstone (Late Triassic, Norian) 4150 Trss - Shuyak Formation, sedimentary member (Upper Triassic) 4235 Chulitna sequence, volcanic and sedimentary rocks (Late Triassic) 4240 Trvm - Mafic dikes, sill, and plugs (Triassic?) 4250 Trsv - Shuyak Formation, volcanic member (Upper Triassic) 4310 Trqd - Quartz diorite to diorite (Late Triassic) 4320 gabbro, diabase, and metagabbro (Late Triassic?) 4420 Trn - Nikolai Greenstone and related rocks (Upper and (or) Middle Triassic) 4422 Nikolai Greenstone, pillow basalt member (Late and (or) Middle Triassic) 4425 Trc - Cottonwood Bay Greenstone (Upper Triassic, Carnian or older) 4430 basaltic metavolcanic rocks (Late Triassic) 4450 metabasalt and slate (Late Triassic) 4880 Mzg - McHugh and Uyak Complexes, gabbro (Mesozoic) 4890 Mzu - McHugh and Uyak Complexes, ultramafic plutonic rocks (Mesozoic) 5030 TrPavs - Basaltic to andesitic metavolcanic and sedimentary rocks (Triassic?, Permian, Cisuralian, and Pennsylvanian?) 5160 undivided intrusive rocks (Mesozoic or Paleozoic) 5180 gabbro and quartz diorite (Mesozoic and (or) Paleozoic) 5190 undivided dunite and serpentinite (Mesozoic or Paleozoic) 5200 metamorphic rocks, undivided (Mesozoic and Paleozoic) 5210 argillite and lithic graywacke (Early Cretaceous) 5220 JPk - Kakhonak Complex (Jurassic, Triassic, and Permian? or older?) 5240 MzPzm - Metamorphosed mafic volcanic and sedimentary rocks (Mesozoic and Paleozoic) 5245 diorite, gabbro, picrite, and pyroxenite sill and dike swarm complex (Mesozoic) 5290 serpentinite (Mesozoic and (or) Paleozoic) 5310 Dillinger stratigraphic sequence, undivided (Paleozoic) 5370 Mystic and Dillinger stratigraphic sequences, undivided (Triassic to Ordovician) 5410 volcanic and sedimentary rocks (middle or late Paleozoic) 5450 pillow basalt (middle or late Paleozoic) 5550 JPam - Amphibolite (Lower Jurassic or older) 5625 metamorphosed Skolai Group 5630 Slana Spur Formation, volcaniclastic rocks (Early to Middle Permian) 5641 greenstone (Middle to Early Jurassic metamorphic age) 5920 Strelna Metamorphic complex, low- to medium-grade greenschist and amphibolite (Late Jurassic or older) 5950 Eagle Creek Formation, marine argillite and limestone, lower greenschist facies (Early Permian) 5955 JPmb - Marble (Jurassic, metamorphic age; Permian? protolith age) 6010 Sheep Creek Formation and correlative siliciclastic units of the Mystic stratigraphic sequence (Permian to Devonian) 6120 Station Creek Formation andesitic volcanic rocks (Early Permian? and Pennsylvanian) 6615 thin-bedded limestone 7580 Post River Sandstone and Lyman Hills Formations and correlative units, silty limestone and siltstone (Early Ordovician) 9322 pelitic and quartzose schist of the Alaska Range LABEL LABEL is a character field (6 8 C) which holds the label of the geologic unit. When NSAMOD has the value 'Q', the unit is queried and the symbol '?' is appended to the value in LABEL. this data set JPam Amphibolite (Lower Jurassic or older) JPk Kakhonak Complex (Jurassic, Triassic, and Permian? or older?) JPmb Marble (Jurassic, metamorphic age; Permian? protolith age) JTrlm Limestone and marble (Lower Jurassic or Upper Triassic?) Jc Chinitna Formation, undivided (Middle Jurassic, Callovian) Jcp Chinitna Formation, Paveloff Siltstone Member (Middle Jurassic, Callovian) Jct Chinitna Formation, Tonnie Siltstone Member (Middle Jurassic, Callovian) Jeqd Plutons proximal to the Border Ranges fault zone, quartz diorite and tonalite (Middle and Early Jurassic) Jmu Alaska-Aleutian Range batholith, mafic and ultramafic plutonic rocks (Middle and late Early Jurassic) Jn Naknek Formation, undivided (Upper Triassic, Tithonian to Oxfordian) Jnc Naknek Formation, Chisik Conglomerate Member (Upper Triassic, Tithonian to Oxfordian) Jni Naknek Formation, Indecision Creek Sandstone Member (Upper Jurassic, Tithonian and Kimmeridgian) Jnk Naknek Formation, Katolinat Conglomerate Member (Upper Jurassic, Tithonian) Jnn Naknek Formation, Northeast Creek Sandstone (Upper Jurassic, Oxfordian) Jnp Naknek Formation, Pomeroy Arkose Member (Upper Jurassic, Kimmeridgian and Oxfordian?) Jnst Naknek Formation, Snag Harbor Siltstone Member (Upper Jurassic, Kimmeridgian and Oxfordian) Jp Pogibshi formation of Kelley (1980), undivided (Lower Jurassic, Sinemurian to Hettangian and older?) Jpmu Plutonic and metamorphic rocks, undifferentiated (Middle to Early Jurassic, metamorphic age) Jqd Quartz diorite, tonalite, and diorite (Jurassic) Jqm Granodiorite and quartz monzonite (Middle and late Early Jurassic) Jsch Greenschist and blueschist (Jurassic, metamorphic age) Jt Tuxedni Group, undivided (Middle Jurassic, lower Bathonian to Aalenian) Jtb Tuxedni Group, Bowser Formation (Middle Jurassic, lower Bathonian and upper Bajocian) Jtc Tuxedni Group, Cynthia Falls Sandstone (Middle Jurassic, Bajocian) Jtf Tuxedni Group, Fitz Creek Siltstone (Middle Jurassic, middle Bajocian) Jtg Tuxedni Group, Gaikema Sandstone (middle Jurassic, lower middle Bajocian) Jtk Talkeetna Formation, undivided (Lower Jurassic) Jtkh Talkeetna Formation, Horn Mountain Tuff Member (Lower Jurassic) Jtkm Talkeetna Formation, Marsh Creek Breccia Member (Lower Jurassic) Jtkp Talkeetna Formation, Portage Creek Agglomerate Member (Lower Jurassic) Jtr Alaska-Aleutian Range batholith, Trondhjemite (Late Jurassic) Jtrg Tuxedni Group, Red Glacier Formation (Middle Jurassic, lower Bajocian to Aalenian) Jtt Tuxedni Group, Twist Creek Siltstone (Middle Jurassic, Bajocian) Jum Plutons proximal to the Border Ranges fault zone, mafic and ultramafic rocks, undivided (Middle Jurassic or older? KJms HcHugh Complex, graywacke and conglomerate (Early Cretaceous to Early Jurassic, Pliensbachian) KJq Quartz monzodiorite (Cretaceous? and (or) Jurassic?) KJs Turbiditic sedimentary rocks of the Kahiltna flysch sequence (Cretaceous, Aptian and Valanginian or younger to Upper Jurassic?) KMm McHugh and Uyak Complexed, undivided (Cretaceous to Mississippian) KTrmc McHugh Complex, basalt and chert (Early Cretaceous to Middle Triassic, Albian to Ladinian) Kcc Cape Current terrace of Connelly (1978) (Upper Cretaceous) Kes Turbiditic sedimentary and volcanic rocks (Cretaceous, Aptian or younger) Kgd Granodiorite (Late Cretaceous) Kgr Granite (Cretaceous) Khe Herendeen Formation (Lower Cretaceous, Barremian and Hauterivian) Kivs Metamorphosed intermediate volcanic and sedimentary rocks (Cretaceous) Kkd Kodiak Formation (Upper Cretaceous) Kkg Kaguyak Formation (Upper Cretaceous, Maastrichtian and Campanian) Klt Leucotonalite and trondhjemite (Early Cretaceous, Albian to Barremian) Km Matanuska Formation (Upper Cretaceous to upper Lower Cretaceous, Maastrichtian to Albian) Kogr Older granite (Cretaceous, Cenomanian) Kps Pelitic schist (Cretaceous?) Kqd Quartz diorite (Late Cretaceous) Kqms Quartz monzonite, monzonite, and syenite (Late Cretaceous) Ksf Feldspathic sedimentary rocks (Cretaceous) Ksm Saddle Mountain section of Magoon and others (1980) (Upper Cretaceous, Maastrichtian) Kum Ultramafic rocks (Late Cretaceous) Kv Intermediate and felsic volcanic rocks (Cretaceous) Kvgs Valdez Group, schist (Upper Cretaceous) Kvm Valdez Group, melange of Iceworm Peak of Kusky and others (1997) (Upper Cretaceous) Kvs Valdez Group, metasedimentary rocks, undivided (Upper Cretaceous) Kvv Valdez Group, mafic metatuff (Upper Cretaceous) Kyh Graywacke of the Yenlo Hills (Cretaeous?) MzPzm Metamorphosed mafic volcanic and sedimentary rocks (Mesozoic and Paleozoic) Mzg McHugh and Uyak Complexes, gabbro (Mesozoic) Mzu McHugh and Uyak Complexes, ultramafic plutonic rocks (Mesozoic) QTv Old volcanic rocks, undivided (Pleistocene or Pliocene) Qad Andesite and dacite domes (Pleistocene) Qaf Alluvial fan deposits (Holocene) Qat Alluvium along major rivers and in terraces (Holocene) Qb Beach deposits (Quaternary) Qbc Bootlegger Cove Formation (Upper Pleistocene) Qd Eolian deposits (Quaternary) Qdf Debris-flow deposits (Holocene) Qdl Deltaic deposits (Quaternary) Qes Estuarine deposits (Holocene) Qg Major moraine and kame deposits (Upper Pleistocene) Qgc Glacioalluvium (Upper Pleistocene) Qge Glacioestuarine deposits (Upper Pleistocene) Qgl Glaciolacustrine deposits (Holocene and Upper Pleistocene) Qgo Outwash in plains, valley trains, and fans (Upper Pleistocene) Qhg Young moraine deposits (Holocene) Qho Younger outwash deposits (Holocene) Qhv Volcanic rocks (Holocene) Qlc Landslide and colluvial deposits (Holocene and Upper Pleistocene) Qm Glacial deposits, undivided (Quaternary) Qog Older glacial deposits (Middle or Lower Pleistocene) Qs Surficial deposits, undivided (Quaternary) Qsl Lacustrine, swamp, and fine silt deposits (Quaternary) Qtf Modern tidal flat and estuarine depoists (Holocene) Qv Volcanic rocks, undivided (Quaternary) Qvd Dacitic to rhyolitic domes (Holocene) TKc Cataclastite (Eocene? and Cretaceous, metamorphic age) TKd Dikes and sills (Tertiary to Cretaceous) TKft Felsic tuff (early Tertiary or Cretaceous) TKg Granitic rocks, undivided (Paleocene to Late Cretaceous) TKgb Gabbroic rocks (Tertiary and (or) Cretaceous) TKgd Granodioritic rocks (Paleocene to Late Cretaceous) TKgg Gneiss (Tertiary or Cretaceous, metamorphic age) TKv Older volcanic rocks, undivided (Paleocene to Upper Cretaceous) Tar Arkose Ridge Formation (lower Eocene and upper Paleocene) Tb Basaltic volcanic rocks (Pliocene) Tch Chickaloon Formation (lower Eocene and upper Paleocene) Tcl Copper Lake Formation, undivided (lower Eocene and Paleocene?) Tem Mafic volcanic rocks (Eocene) Tfv Felsic volcanic and sub-volcanic rocks (Eocene) Tgd Biotite-hornblende-granodiorite (Paleocene) Tgn Gabbronorite (Oligocene? or Eocene?) Thg Hypabyssal granitic rocks (Paleocene?) Ti Intrusive rocks, undivided (Tertiary) Tkb Kenai Group, Belulga Formation (Miocene) Tkh Kenai Group, Hemlock Conglomerate, undivided (Oligocene) TKn Kenai Group, undivided (Pliocene to Oligocene) Tks Kenai Group, Sterling Formation (Pliocene and Miocene) Tkt Kenai Group, Tyonek Formation (Miocene and Oligocene) Tmb Basalt and andesite (Oligocene and Eocene) Tmf Tuffaceous felsic volcanic rocks (Eocene?) Tmv Paleogene volcanic rocks, undivided (Oligocene and Eocene) Toegr Granitic rocks (Oligocene and late Eocene) Tpd Biotite diorite (Paleocene) Tpg Gibraltar Lake Tuff (Pliocene? to Oligocene?) Tpgr Granitic rocks of Paleocene age (Paleocene) Tpi Intermediate intrusive rocks (Pliocene and latest Miocene) Tpv Intermediate to mafic volcanic rocks (Paleocene) TrPavs Basaltic to andesitic metavolcanic and sedimentary rocks (Triassic?, Permian, Cisuralian, and Pennsylvanian?) Trc Cottonwood Bay Greenstone (Upper Triassic, Carnian or older) Trkb Kamishak Formation, Bruin Limestone Member (Upper Triassic, Norian) Trkm Kamishak Formation, Middle Member (Upper Triassic, Norian) Trku Kamishak Formation, Ursus Member (Upper Triassic, Norian) Trn Nikolai Greenstone and related rocks (Upper and (or) Middle Triassic) Trpg Port Graham formation of Kelley (1980) (Upper Triassic, Norian) Trqd Quartz diorite to diorite (Late Triassic) Trss Shuyak Formation, sedimentary member (Upper Triassic) Trsv Shuyak Formation, volcanic member (Upper Triassic) Trvm Mafic dikes, sills, and plugs (Triassic?) Tsu Sedimentary rocks, undivided (Tertiary) Tts Tsadaka Formation (Miocene or Oligocene) Tvs Volcaniclastic sedimentary rocks (Eocene or younger) Tvu Tertiary volcanic rocks, undivided (Tertiary) Tw Wishbone Formation (Eocene) Twf West Foreland Formation (Eocene and Paleocene) bu bedrock, unmapped NSAMOD NSAMOD is a character (8 10 C) item in the polygon attribute table this data set ALT - hydrothermally altered, nonspecific ALT-SER - sericitic alteration HFS - contact metamorphism, nonspecific Q - queried unit SOURCE SOURCE is a character (6 8 C) item found in both the polygon and arc attribute tables. The values are abbreviated codes representing the original source reference for the polygon or arc feature. The format for SOURCE is XX###, where XX is a two letter code for the 1:250,000-scale quadrangle and ### is a three digit number (with leading zeros). All source codes with '001' are unspecified sources for water and ice features, often paper topographic maps, DRG or DLG files. this data set AF002 Riehle, J.R., Detterman, R.L., Yount, M.E., and Miller, J.W., 1993, Geologic map of the Mount Katmai quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2204, scale 1:250,000. AF004 Connelly, William, and Moore, J.C., 1979, Geologic map of the northwest side of the Kodiak and adjacent islands, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1057, 2 sheets, scale 1:250,000. AF005 Wilson, F.H., 2005, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map of the Kodiak Islands, Alaska: U.S. Geological Survey Open-File Report 2005-1340. AF006 Riehle, J.R., and Detterman, R.L., 1993, Quaternary geologic map of the Mount Katmai quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2032, scale 1:250,000. AF008 Wilson, F.H., Detterman, R.L., and DuBois, G.D., 1999, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Open-File Report 99-317. AF010 Capps. S.R., 1937, Kodiak and adjacent islands, Alaska: U.S. Geological Survey Bulletin 880-C, p. 111-184. AF011 Magoon, L.B., Adkison, W.L., and Egbert, R.M., 1976, Map showing geology, wildcat wells, Tertiary plant localities, K-Ar age dates, and petroleum operations, Cook Inlet area, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1019, scale 1:250,000, 3 sheets. AF012 Wilson edits AF013 Fisher, M.A, and Magoon, L.B., 1978, Geologic framework of lower Cook Inlet, Alaska: American Association of Petroleum Geologists Bulletin, v. 62, no. 3, p. 373-402. AN002 Winkler, G.R., compiler, 1992, Geologic map and summary geochronology of the Anchorage 1x3 degree quadrangle, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2283, scale 1:250,000. AN005 Nelson, S.W., Miller, M.L., Haeussler, P.J., Snee, L.W., Phillips, P.J., Huber, Carol, 1999, Preliminary geologic map of the Chugach National Forest Special Study Area, Alaska: U.S. Geological Survey Open-File Report 99-362, scale 1:63,360. AN007 Hank Schmoll, 2008 AN008 Wilson and Hults edits AN010 Reger, R.D., 1977, Reconnaissance geology of the Talkeetna-Kashwitna area, Susitna River basin, Alaska: Alaska Division of Geological and Geophyiscal Surveys Alaska Open-File Report AOF-107a, 1 sheet, scale 1:63,360. AN012 Detterman, R.L., Plafker, George, Hudson, Travis, Tysdal, R.G., and Pavoni, Nazario, 1974, Surface geology and Holocene breaks along the Susitna segment of the Castle Mountain fault, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-618, scale 1:24,000. AN013 Haeussler, P.J., 1998, Surficial geologic map along the Castle Mountain fault between Houston and Hatcher Pass Road, Alaska: U.S. Geological Survey Open-File Report 98-480, scale 1:25,000. AN014 Detterman, R.L., Hudson, Travis, Plafker, George, Tysdal, R.G., and Hoare, J.M., 1976, Reconnaissance geologic map along Bruin Bay and Lake Clark faults in Kenai and Tyonek quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-477, 4 p., 1 sheet, scale 1:250,000. AN015 Albanese, M., Kline, J.T., Bundtzen, T.K., and Kline, K., 1983, Reconnaissance geology and geochemistry of the Willow Creek-Hatcher Pass area, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File PDF 83-9, 1 sheet, scale 1:63,360. AN017 Reger, R.D., and Updike, R.G., 1983, Upper Cook Inlet region and the Matanuska Valley, in Pewe, T.L., and Reger, R.D., eds., Fourth international conference on permafrost, Fairbanks, Alaska, July 18-22, 1983, Guidebook to permafrost and Quaternary geology along the Richardson and Glenn Highways between Fairbanks and Anchorage, Alaska: Division of Geological and Geophysical Surveys, Department of Natural Resources, Fairbanks, Alaska, p. 185-263, 1 sheet, scale 1:250,000. IL002 Detterman, R.L., and Reed, B.L., 1980, Stratigraphy, structure, and economic geology of the Iliamna quadrangle, Alaska: U.S. Geological Survey Bulletin 1368-B, 86 p., 1 sheet, scale 1:250,000. IL003 Detterman. R.L., and Reed, B.L., 1973, Surficial deposits of the Iliamna quadrangle, Alaska: U.S. Geological Survey Bulletin 1368-A, 64 p., 1 plate, scale 1:250,000. IL006 Wilson, F.H., Blodgett, R.B., Blome, C.D., Mohadjer, Solmaz, Preller, C.C., Klimasauskas, E.P., Gamble, B.M., and Coonrad, W.L., 2006, Reconnaissance bedrock geologic map for the northern Alaska Peninsula area, southwest Alaska; including the Dillingham, Iliamna, Lake Clark, Taylor Mountains and the western part of the Kenai and Seldovia 1:250,000-scale quadrangles: U.S. Geological Survey Open-file Report 2006-1303. IL007 Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 pl. 6 plates, scale 1:63,360. IL008 Waythomas, C.F., and Miller, T.P., 1999, Preliminary volcano-hazard assessment for Iliamna volcano: U.S. Geological Survey Open-File Report 99-373, 31 p., 1 plate, scale unknown. IL009 Bouley, B.A., St. George, Phil, and Wetherbee, P.K., 1995, Geology and discovery at Pebble Copper, a copper-gold porphyry system in southwest Alaska, in Porphyry deposits of the northwest Cordillera of North America: Canadian Institute of Mining, Metallurgy, and Petroleum Special Volume 46, p. 422-435. IL011 Wilson edits for Cook Inlet map IL013 Wilson, F.H., 2008, Surficial geology for Lake Clark National Park region IL014 Fisher, M.A., and Magoon, L.B., 1978, Geologic framework of lower Cook Inlet, Alaska: American Association of Petroleum Geologists Bulletin, v. 62, no. 3, p. 373, 402. KN002 Magoon, L.B., Adkison, W.L., and Egbert, R.M., 1976, Map showing geology, wildcat wells, Tertiary plant localities, K-Ar age dates, and petroleum operations, Cook Inlet area, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1019, 3 sheets, scale 1:250,000. KN003 Bradley, D.C., and Wilson, F.H., 2000, Reconnaissance bedrock geology of the southeastern part of the Kenai quadrangle, Alaska, in Kelley, K.D., and Gough, L.P., eds., Geologic Studies in Alaska: U.S. Geological Survey Professional Paper 1615, pl. 59-64. KN005 Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p., 6 plates, scale 1:63,360. KN006 Riehle, J.R., and Emmel, K.S., 1980, Photointerpretation map of the surficial geology, Polly Creek to MacArthur River, Cook Inlet, Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 64, 2 sheets, scale 1:63,360. KN008 Wilson, F.H., Blodgett, R.B., Blome, C.D., Mohadjer, Solmaz, Preller, C.C., Klimasauskas, E.P., Gamble, B.M., and Coonrad, W.L., 2006, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissnace geologic map for the northern Alaska Peninsula area, southwest Alaska: U.S. Geological Survey Open-File Report 2006-1303. KN009 Reed, B.L., Lanphere, M.A., and Miller, T.P., 1992, Double Glacier volcano, a 'new' Quaternary volcano in the eastern Aleutian volcanic arc: Bulletin of Volcanology, v. 54, p. 631-637. KNO11 Waythomas, C.F., and Miller, T.P., 1999, Preliminary volcano-hazard assessment for Iliamna volcano: U.S. Geological Survey Open-File Report 99-373, 31 p., 1 plate. KN012 Reed, B.L., Miesch, A.T., and Lanphere, M.A., 1983, Plutonic rocks of Jurassic age in the Alaska-Aleutian Range batholith: Chemical variations and polarity: Geological Society of America Bulletin, v. 94, p. 1232-1240. KN013 Karlstrom, T.N.V., 1964, Quaternary geology of the Kenai Lowland and glacial history of the Cook Inlet region, Alaska: U.S. Geological Survey Professional Paper 443, 69 p., 7 plates, various scales. KN015 Wilson and Hults edits LC002 Nelson, W.H., Carlson, Christine, and Case, J.E., 1983, Geologic map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114A, scale 1:250,000. LC003 Wallace, W.K., Hanks, C.L., and Rogers, J.F., 1989, The southern Kahiltna terrane: implications for the tectonic evolution of southwestern Alaska: Geological Society of Americal Bulletin, v. 101, p. 1389-1407. LC005 Wilson, F.H., Blodgett, R.B., Blome, C.D., Mohadjer, Solmaz, Preller, C.C., Klimasuskas, E.P., Gamble, B.M., Coonrad, W.L., 2006, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the northern Alaska Peninsula area, southwestern Alaska: U.S. Geological Survey Open-File Report 2006-1303. LC006 Wallace, W.K., 2002, unpublished geologic mapping dated 1985. LC007 Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p., 6 plates, scale 1:63,360. LC010 Waythomas, C.F., and Miller, T.P., 1999, Preliminary volcano-hazard assessment for Iliamna volcano: U.S. Geological Survey Open-File Report 99-373, 31 p., 1 plate. LC011 Reed, B.L., Miesch, A.T., and Lanphere, M.A., 1983, Plutonic rocks of Jurassic age in the Alaska-Aleutian Range batholith: Chemical variations and polarity: Geological Society of Americal Bulletin, v 94, p. 1232-1240. LC012 Eakins, G.R., Gilbert, W.G, and Bundtzen, T.K., 1978, Preliminary bedrock geology and mineral resource potential of west-central Lake Clark quadrangle of Alaska: Alaska Division of Geological and Geophysical Surveys Alaska Open-File Report AOF 118, 15 p., 2 plates, scale 1:125,000. MK003 Riehle, J.R., and Detterman, R.L., 1998, Quaternary geologic map of the Mount Katmai quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2032, scale 1:250,000. MK004 Riehle, J.R., Detterman, R.L., Yount, M.E., and Miller, J.W., 1993, Geologic map of the Mount Katmai quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2204, scale 1:250,000. MK005 Wilson, F.H., Detterman, R.L., and DuBois, G.D. 1999, Geologic framework of the Alaska Peninsula: U.S. Geological Survey Open-File Report 99-317. MK008 Wilson edits MK009 Detterman field sheet compilations SR002 Nelson, S.W., Dumoulin, J.A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645B, scale 1:250,000. SR004 Tysdal, R.G., and Case, J.E., 1979, Geologic map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1150, scale 1:250,000. SR005 Nelson, S.W., Miller, M.L., Haeussler, P.J., Snee, L.W., Phillips, P.J., Huber, Carol, 1999, Preliminary geologic map of the Chugach National Forest Special Study Area, Alaska: U.S. Geological Survey Open-File Report 99-362, scale 1:63,360. SR006 Wilson, F.H., Hults, C.P., Labay, K.A., and Shew, Nora, 2008, Preliminary integrated geologic map databases for the United States: Digital data from the reconnaissance geologic map for Prince William Sound and the Kenai Peninsula, Alaska: U.S. Geological Survey Open-File Report OFR 2008-1002. SR007 Bradley, D.C., and Miller, M.L., 2006, Field guide to south-central Alaska's accretionary complex Anchorage to Seward: Anchorage, Alaska Geological Society, 32 p. SR008 Bol, A.J., and Gibbons, Helen, 1992, Tectonic implications of out-of-sequence faults in an accretionary prism, Prince Willam Sound, Alaska: Tectonics, v. 11, n. 6, p. 1288-1300. SV002 Bradley, D.C., Kusky, T.M., Haeussler, P.J., Karl, S.M., and Donley, D.T., 1999, Geology of the Seldovia quadrangle: U.S. Geological Survey Open-File Report 99-18, scale 1:250,000. SV004 Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p., 6 plates, scale 1:63,360. SV007 Karlstrom, T.N.V., 1964, Quaternary geology of the Kenai Lowland and glacial history of the Cook Inlet region, Alaska: U.S. Geological Survey Professional Paper 443, 69 p., 7 plates, various scales. SV008 Bradley, D.C., oral communication, June 7, 2007. SV009 Wilson, F.H., Hults, C.P., Labay, K.A., and Shew, Nora, 2008, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for Prince William Sound and the Kenai Peninsula, Alaska: U.S. Geological Survey Open-File Report 2008-1002. SV010 Magoon. L.B., Adkison, W.L., and Egbert, R.M., 1976, Map showing geology, wildcat wells, Tertiary plant localities, K-Ar age dates, and petroleum operations, Cook Inlet area, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1019, scale 1:250,000, 3 sheets. SV011 Fisher, M.A., and Magoon, L.B., 1978, Geologic framework of lower Cook Inlet, Alaska: American Association of Petroleum Geologists Bulletin, v. 62, no. 3, p. 373-402. TK002 Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest corner Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558A, scale 1:250,000, 60 p. TK003 Kline, J.T., Bundtzen, T.K., and Smith, T.E., 1990, Preliminary bedrock geologic map of the Talkeetna Mountains D-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 90-24, scale 1:63,360. TK005 Schmidt, J.M., 2007, Revisions to Talkeetna Mountains map, written communication, 2007 and 2008. TK007 Wilson edits, 2008 TK008 Reger, R.D., 1977, Reconnaissance geology of the Talkeetna-Kashwitna area, Susitna River basin, Alaska: Alaska Division of Geological and Geophysical Surveys Alaska Open-File Report AOF-107a, 1 sheet, scale 1:63,360. TL002 Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1174, 15 p., 1 plate, scale 1:250,000. TL003 Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of the Central (Interior) Alaska: U.S. Geological Survey Open-File Report OFR 98-133, 76 p., 3 sheets, scale 1:500,000 TL004 Wilson edits TL005 Reger, R.D., 1977, Reconnaissance geology of the Talkeetna-Kashwitna area, Susitna River basin, Alaska: Alaska Division of Geological and Geophysical Surveys Alaska Open-File Report AOF-107a, 1 sheet, scale 1:63,360. TL007 Weber, F.R., 1961, Reconnaissance engineering geology for the selection of highway route from Talkeetna to McGrath, Alaska: U.S. Geological Survey Open-File Report OFR 61-169, 2 sheets, scale 1:250,000. TY003 Reed, B.L., and Elliott, R.L., 1970, Reconnaissance geologic map, analyses of bedrock and stream sediment samples, and an aeromagnetic map of parts of the southern Alaska Range: U.S. Geological Survey Open-File Report OFR 70-271, 24 p., scale 1:250,000. TY004 Solie, D.N., Gilbert, W.G., Harris, E.E., Kline, J.T., Liss, S.A., and Robinson, M.S., 1991, Preliminary geologic map of Tyonek D-6 and eastern Tyonek D-7 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public-Data File PDF 91-10, 15 p., scale 1:63,360. TY005 Haeussler, P.J., 1997, unpublished compilation, includes contributions from Madeline Milholland TY006 Karlstrom, T.N.V., 1964, Quaternary geology of the Kenai Lowland and glacial history of the Cook Inlet region, Alaska: U.S. Geological Survey Professional Paper 443, 69 p., 7 plates, various scales. TY007 Wilson and Hults edits TY008 Schmoll 2007 compilation TY009 Haeussler, 2007 TY010 Detterman, R.L., Plafker, George, Hudson, Travis, Tysdal, R.G., and Pavoni, Nazario, 1974, Surface geology and Holocene breaks along the Susitna segment of the Castle Mountain fault, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-618, scale 1:24,000. TY013 Bundtzen, T.K., and Jorgenson, Torre, 2005, Lime Hills and western Tyonek quadrangles surficial geologic mapping and ecosystem development anaylsis of glacial deposits: U.S. National Park Service contract. TY014 Reger, R.D., 1977, Reconnaissance geology of the Talkeetna-Kashwitna area, Susitna River basin, Alaska: Alaska Division of Geological and Geophysical Surveys Alaska Open-File Report AOF-107a, 1 sheet, scale 1:63,360. TY016 Weber, F.R., 1961, Reconnaissance engineering geology for the selection of highway route from Talkeetna to McGrath, Alaska: U.S. Geological Survey Open-File Report 61-169, 2 sheets, scale 1:250,000. arcs Characteristics of the arc features in the geology, fold, lineation, and dike coverages are coded in the arc attribute table. Table <cov>.aat includes the following items: ARC-CODE, ARC-PARA1, ARC-PARA2 (not used), and SOURCE. For explanation of SOURCE, see attribute definitions for polygons. this data set ARC-CODE ARC-CODE is a positive integer value (3 3 I) item in the arc attribute table. Values range discontinuously from 0 to 127. Values match one-for-one with geologic features (such as stratigraphic contact, fault, etc.) Some ARC-CODE values have additional modifiers in item ARC-PARA1. this data set 1 Stratigraphic or intrusive contact, location certain 2 Stratigraphic or intrusive contact, location approximate 3 Stratigraphic or intrusive contact, location inferred, queried 4 Normal fault, location certain; if ARC-PARA1 = 1, then upthrown side is on right from origin 5 Normal fault, location approximate; if ARC-PARA1 = 1, then upthrown side is on right from origin 6 Normal fault, location inferred or queried; if ARC-PARA1 = 2, then upthrown side on on right from origin 7 Shoreline or riverbank 8 Internal contact or phase change; no symbol drawn 9 Boundary of altered zone or hornfels; no symbol drawn 10 Thrust fault, location certain; teeth on right from origin 11 Thrust fault, location approximate; teeth on right from origin 12 Thrust fault, location inferred or queried; teeth on right from origin 13 Scour limit or trim line (not drawn) 14 Caldera or crater rim 15 Ice contact 19 Moraine limit; tics on right from origin; arc-para1 = 1, 2, 3, or 4 designate moraines of Naptowne glaciation on the Kenai Peninsula 21 Syncline, location certain, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip 23 Syncline, location inferred or queried; digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip 24 Anticline, location certain, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip. 25 Anticline, location approximate, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip 26 Anticline, location inferred or queried, digitized in direction of plunge; ARC-PARA1 equals angle of plunge, 0 is no plunge, 1 is plunge of unknown dip 28 concealed or inferred caldera margin 30 Fault, sense of displacement uncertain; location certain; if arc-para1 = 1, then upthrown side is on the right from origin 31 Fault, sense of displacement uncertain; location approximate 32 Fault, sense of displacement uncertain; location inferred 34 terrace scarp 35 High-angle reverse fault, location certain, teeth on right from origin 36 High-angle reverse fault, location approximate, teeth on right from origin 37 High-angle reverse fault, location inferred, teeth on right from origin 50 Dikes and sills 51 Concealed contact 52 Concealed normal fault; if ARC-PARA1 = 1, then upthrown side is on right from origin 53 Concealed thrust fault 54 Concealed high-angle reverse fault 55 Concealed normal fault, having right lateral oblique slip 56 Concealed normal fault, having left lateral oblique slip 57 Concealed right lateral fault 58 Concealed left lateral fault 59 Concealed shear zone 60 Concealed fault with displacement uncertain 72 Normal fault, location approximate, having right lateral oblique slip 76 Normal fault, location inferred, queried, having right lateral oblique slip 87 Right lateral fault, location certain 88 Right lateral fault, location approximate 89 Right lateral fault, location inferred, queried 91 Left lateral fault, location approximate 92 Left lateral fault, location inferred, queried 93 Lineament 94 Shear zone, certain 99 Bounding line (neatline) of coverage U.S. Geological Survey mailing address

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Lakewood CO 80225 U.S.A. 1-888-ASK-USGS OFR 2009-1108 This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. 20090622 U.S. Geological Survey Nora Shew mailing address

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