Gulf of Alaska

Bristol Bay

Bering Sea

Shelikof Strait

Becharof Lake

Proposed Alaska Peninsula Areawide Oil and Gas Lease Sale Area

Sanak Basin

Albatross Basin

Bristol Bay Basin

Shelikof Basin

USGS

OF9

9-317

Geo

logy

Surro

undin

g Loc

al Ge

ology

(Beik

man,

1980

)

USGS

OF9

9-317

Geo

logy

Surro

undin

g Loc

al Ge

ology

(Beik

man,

1980

)

Rex

Mike

PyramidCu, Au

Halibut BayCr

ShumaginAu, Ag

Bee CreekCu, Au

CentennialAu, Cu

Apollo-SitkaAu, Ag, Pb, Zn, Cu

LEE 1ALASKA 1

UGASHIK 1

MCNALLY 1

LATHROP 1

GRAMMER 1

BECHAROF 1

FINNEGAN 1

COSTELLO 2COSTELLO 1

PAINTER CK 1

GREAT BASINS 2

GREAT BASINS 1

BIG RIVER A-01

BEAR CK UNIT 1

WIDE BAY UNIT 1

SANDY RIV FED 1

CANOE BAY UNIT 1

OCS 0168(COHO) 2OCS 0168(COHO) 1

DAVID RIVER USA 1

PORT HEIDEN UNIT 1

DAVID RIVER USA 1-A

OCS 0248(CARDINAL) 1

OCS 76-35(KSST-KOD) 1

KONIAG CHEVRON USA 1

HOODOO LK UNIT USA 2

HOODOO LK UNIT USA 1

PACIFIC OIL AND COM 2

PACIFIC OIL AND COM 1

OCS8218 COST N ALTN 1

OCS 0248(CARDINAL) 1A

CATHEDRAL RIVER UNIT 1

OIL SEEP R

OIL SEEP R

OIL SEEP R

OIL SEEP

OIL SEEP

OIL SEEP

GAS SEEP

GAS SEEP

OIL SEEP D

OIL SEEP A, D

OIL SEEP A, R

OIL SEEP A, R

OIL-BEARING OUTCROP

OIL-BEARING OUTCROP

Uyak

Ekuk

Sanak

Egegik

Akhiok

Kodiak

Naknek

Uganik

KarlukUgashik

Chignik

Afognak

Kaguyak

Chiniak

Cold Bay

Ayakulik

Ouzinkie

BelkofskiKing Cove

Sand Point

Larsen Bay

Old Harbor

Port Lions

Womens Bay

PerryvilleIvanof Bay

False Pass

Pilot Point

King Salmon

Port Heiden

Port Moller

Squaw Harbor

South Naknek

Chignik Lake

Nelson Lagoon

Portage Creek

Pauloff Harbor

Chignik Lagoon

165°0'0"W

164°0'0"W

164°0'0"W

163°0'0"W

163°0'0"W

162°0'0"W

162°0'0"W

161°0'0"W

161°0'0"W

160°0'0"W

160°0'0"W

159°0'0"W

159°0'0"W

158°0'0"W

158°0'0"W

157°0'0"W

157°0'0"W

156°0'0"W

156°0'0"W

155°0'0"W

155°0'0"W

154°0'0"W

154°0'0"W 153°0'0"W

153°0'0"W

152°0'0"W

55°0'0"N

55°0'0"N

56°0'0"N

56°0'0"N

57°0'0"N

57°0'0"N

58°0'0"N

58°0'0"N

State of AlaskaDepartment of Natural ResourcesDivision of Oil and Gas

Alaska PeninsulaOil and Gas Field Map Series

Plate 1 of 3Regional Geology for the Bristol Bay Region and Alaska Peninsula

Nome

SitkaKodiak

Bethel

Barrow

ValdezJuneau

Cold BayUnalaska

Fairbanks

Ketchikan

Anchorage

Dillingham

Prudhoe Bay

Canada

Russia

Gulfof

AlaskaBering

Sea

Chukchi Sea

Plugged & Abandoned - Gas Show

Scale 1:500,000

filename: AKPen_Regional_Geology_42x67_v10.mxd

Central Meridian: -154.000000Standard Parallel 1: 55.000000Standard Parallel 2: 65.000000 Latitude of Origin: 50.000000

Alaska Albers Equal Area Conic False Easting: 0.000000 False Northing: 0.000000GCS North American 1983

This map was created, edited, and published by the State of Alaska, Department of Natural Resources, Division of Oil and Gas, and is for informational purposes only. The State of Alaska makes no expressed or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of this product or its appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential or other damages suffered by the user or any other person or entity whether from use of the product, any failure thereof or otherwise, and in no event will the State of Alaska's liability to you or anyone else exceed the fee paid for the product. Discrepancies in boundary alignments are the result of merging multiple data sets from a number of different sources. Uncertainty exists in the exact location of the Proposed Alaska Peninsula Areawide Oil and Gas Lease Sale Area boundary with regard to the State of Alaska 3 mile limit of off-shore ownership in this area.

Data Sources: Basemap data including hydrologic data, village and town locations, glaciers and icefields, land status, coal, load and placer deposits, volcanoes, roads and boundaries, etc. from State of Alaska Statewide Core GIS database. Shaded relief based on dem300m published by USGS 05/12/1997. Surrounding local geology from Beikman, USGS 1980. Sedimentary basins, faults and folds from Kirschner, USGS 1988. Oil and gas wells from Alaska Division of Oil and Gas database as adapted from Alaska Oil and Gas Conservation Commission dataset. Indications of petroleum from Miller, et al., USGS GSB 1094, 1957. Alaska Peninsula geology from Wilson, et al., USGS OFR99-314, 1999.

10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 1405

Kilometers

10 0 10 20 30 40 50 605Nautical Miles

10 0 10 20 30 40 50 605

Miles

Alaska Peninsula Geologic Structure

Syncline - Concealed.

Dikes and Sills.

Syncline - Inferred.Anticline - Certain.

Anticline - Concealed.

Syncline - Certain.

Anticline - Inferred.

Thrust Fault

Normal Fault

Thrust Falut - Inferred

Normal Fault - Inferred

Fault

Fold

Fault - Inferred

Indicators of Petroleum (GSB 1094)

Qualifiers

Approximate location of reported indication.

Inflammable gas associated with nonmarine coal-bearing rocks.

Reported indication regarded as doubtful or disproved on basis of field examination by the US Geological Survey.Inflammable gas associated with unconsolidated surficial deposits, probably marsh gas.

Reported indication not examined by the US Geological Survey.

Reported indication regarded as doubful because location is in unfavorable geologic setting.

by TypeGas Seep

Oil Seep

Oil-bearing Outcrop

General BoundariesSedimentary Basins (Kirschner 2002)

Proposed Lease Sale Boundary

AK State Ownership 3 Mile Limit

Towns & Villages

Population < 1000

Population > 1000

Oil and Gas WellsDrill Hole

Plugged & Abandoned

Plugged & Abandoned - Oil Show

Plugged & Abandoned - Oil and Gas Show

Minerals & Geohazards

Sedimentary BasinsSimplified from Kirschner (2002)

1 - 3 km

3 - 5 km

5 - 7 km

7 - 9 km

Volcanoes

Placer Deposits

Coalfields

Metalliferous Load Deposits

Amak Basin

Tugidak Basin

Shumagin Basin

Surrounding Local Geology (Beikman 1980)Unconsolidated Deposits

uTc - Continental sandstone, siltstone, claystone, minor conglomerate and coal beds (Upper Tertiary)mTc - Continental sandstone, siltstone, claystone and coal beds (Middle Tertiary)ITc - Continental claystone, siltstone, sandstone, conglomerate, and coal beds (Lower Tertiary)

SedimentaryQ - Alluvial, glacial, lake, eolian, beach, and volcanic deposits (Quaternary)Qh - Alluvial, glacial, lake, estuarine, swamp, landslide, flood plain, and beach deposits (Holocene)Qp - Alluvial, glacial, dune sand, loess (Pleistocene)T - Volcanogenic sedimentary rocks and flows, dikes and sills (Tertiary)Tp - Tachilni Formation (Pliocene)Tm - Bear Lake Formation (Miocene)IT - Interbedded sedimentary, volcanogenic, and volcanic rocks (Lower Tertiary)To - Meshik and Stepovak Formation (Oligocene)MzPz - Quartzite, schist and phyllite (Mesozoic and Paleozoic)K - Kaguyak Formation (Cretaceous)uK - Chignik and Hoodoo Formations (Upper Cretaceous)KJ2 - Staniukovich Formation and Herendeen Formation (Lower Cretaceous)KJ3 - Melange of flysch, greenstone, limestone (Lower Cretaceous and upper Jurassic (?))KJ1 - Graywacke, slate, argillite, and minor conglomerate (Cretaceous and upper Jurassic)KJ - Argillite, shale, graywacke, quartzite, conglomerate, lava, tuff, and agglomerate (Cretaceous and Jurassic)IK - Unnamed graywacke, argillite, conglomerate, and minor limestone (Lower Cretaceous)uJ - Sandstone, siltstone, shale, and conglomerate (Upper Jurassic)uTr - Limestone, tuff, tuffaceous conglomerate and breccias (Upper Triassic)mJ - Argillite, graywacke, and conglomerate (Middle Jurassic)IJ - Talkeetna Formation (Lower Jurassic)D - Limestone (Devonian)Z - Schist, gneiss, and small amounts of amphibolite and marble (Precambrian)

Igneous - Plutonic

Tif - Felsic Intrusive rocks (Tertiary)Tim - Mafic Intrusive rocks (Tertiary)mTii - Intermediate Intursive rocks (Middle Tertiary)Txif - Felsic Intrusive rocks (Paleocene)TKi - Undifferentiated Intusive rocks (Tertiary and/or Cretaceous)TKif - Felsic Intrusive rocks (Tertiary and/or Cretaceous)Jii - Intermediate Intrusive rocks (Jurassic)Jim - Mafic Intrusive rocks (Jurassic)

Igneous - VolcanicQhvm - Mafic Volcanic rocks (Holocene)Qvm - Mafic Volcanic rocks (Quaternary)Qv - Undifferentiated volcanic rocks (Quaternary)QTv - Undifferentiated Volcanic rocks (Quaternary or Tertiary)Qvi -Intermediate Volcanic rocks ( Quaternary)Tpv - Undifferentiated Volcanic rocks (Pliocene )Tvm - Mafic Volcanic rocks (Tertiary)Tv - Undifferentiated Volcanic rocks (Tertiary)TKvm - Mafic Volcanic rocks (Tertiary and/or Cretaceous)Jvi - Intermediate Volcanic rocks (Jurassic)

MetamorphicIJm - Metamorphic Intercalated Schist (Lower Jurassic)

Alaska Peninsula Geology (OF99-317)Unconsolidated Deposits

Qa - Alluvial deposits (Holocene and Pleistocene)Qb - Marine beach and estuarine depositsQmt - Marine terrace deposits (Holocene and Pleistocene)Qm - Moraines and other glacial deposits (Holocene and Pleistocene)Qaf - Alluvial fan and landslide deposits (Holocene and Pleistocene)

SedimentaryTmr - Milky River Formation (Pliocene)Tta - Tachilni Formation (late Miocene)Th - Hemlock Conglomerate (late Oligocene)Tbl - Bear Lake Formation (late and middle Miocene)Tu - Unga Formation (middle Miocene to late Oligocene)Tbe - Belkofski Formation (middle Miocene? to late Oligocene?)Ts - Stepovak Formation (early Oligocene and late Eocene)Tt - Tolstoi Formation (middle Eocene to late Paleocene)Tc - Copper Lake Formation (early Eocene and Paleocene?)Ks - Shumagin Formation (Late Cretaceous; Maestrichtian)Ksm - MudstoneKk - Kaguyak Formation (Late Cretaceous; Maestrichtian and Campanian)Kh - Hoodoo Formation (Late Cretaceous; Maestrichtian and Campanian)Kc - Chignik Formation (Late Cretaceous; Maestrichtian and Campanian)Kp - Pedmar Formation (Early Cretaceous; Albian)Khe - Herendeen Formation (Early Cretaceous; Barremian and Hauterivian)Kst - Staniukovich Formation (Early Cretaceous; Valanginian and Berriasian)KJcv - Chert and volcanic sequence (Early Cretaceous or Jurassic)Jk - Kialagvik Formation (Middle and Early Jurassic; Callovian to late Toarcian)Jnk - Katolinat Conglomerate Member (Tithonian)Jni - Indecision Creek Sandstone Member (Tithonian and Kimmeridgian)Jn - Naknek Formation (Late Jurassic; Tithonian to Oxfordian)Jns - Snug Harbor Siltstone Member (Kimmeridgian and Oxfordian)Jnc - Chisik Conglomerate Member (Oxfordian)Jnn - Northeast Creek Sandstone Member (Oxfordian)Js - Shelikof Formation (Middle Jurassic; Callovian)Jt - Talkeetna Formation (Early Jurassic)Trk - Kamishak Formation (Late Triassic; Norian)Trls

Igneous-PlutonicQi - Intrusive rocks (Holocene and Pleistocene)Ti - Intrusive rocks (Pliocene and late Miocene)Tqd - Quartz diorite (Oligocene)Tgd - Granodiorite (Oligocene)Tg - Granodiorite (Paleocene)Tiu - Intrusive rocks, undivided (Tertiary)Jgb - Diorite and gabbro (Late? and Middle Jurassic)Jgd - Granodiorite (Late? and Middle Jurassic)Jgr - Granite (Late? and Middle Jurassic)Jqd - Tonalite and quartz diorite (Late? and Middle Jurassic)

Igneous-VolcanicQv - Volcanic rocks (Holocene and Pleistocene)Qpd - Pyroclastic and debris-flow deposits (Holocene and late Pleistocene?)QTv - Volcanic rocks (Quaternary and Pliocene?)QTp - Pyroclastic deposits (Pleistocene? and Pliocene)QTmvQTdvTvu - Volcanic rocks, undivided (Tertiary)Tv - Volcanic rocks (late Miocene)TopTm - Meshik Volcanics (early Oligocene and late Eocene)Trv - Volcanic rocks (Late Triassic)

MetamorphicQTc - Contact-metamorphosed rocks (early Quaternary or late Tertiary)JPK - Kakhonak(?) Complex (Late Jurassic? to Permian?)Trc - Cottonwood Bay Greenstone (Late Triassic; Norian?)

Other Surface Symbolsg - Glaciers

u - Ultramaphic rocks (age unknown)