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Popcorn Crackerjack Klondike Burger No. 1 Diamond Stratigraphic Key tectonic U.S. CHUKCHI SEA Basin Basin

Age Name events

Sequence Megacycle Mega Age CHRONOSTRATIGRAPHY BETWEEN

P

EXPLORATORY WELLS

M

Neog. Arctic Platform

Legend Neogene Uplift

Basin 25 25 Conglomerate

O

R North Chukchi North Sandstone TEu

E Sagavanirktok Silt/Shale/Clay R Post-KPu

Upper Brookian megacycle Brookian Upper Azolla Event Transgressive Package Paleogene Paleogene 50 50 Carbonate

? PETM Paleocene Depocenter Transtensional Pc

Central Paleogene Paleogene Central Spiculitic Mudstone R R Event (60 Ma.) M

Late Cretaceous High TOC Rocks 75 Eroded from Transpressional 75 Cp Brookian Popcorn Event (70 Ma.) Volcanic Rocks S Anticline KPu Cn megacycle

Middle Brookian Middle Metamorphic & Igneous Rocks

T ECu R Tuluvak Bonarelli R Cm Eroded on Central Seabee Flexure – HALIP Meta-sedimentary Rock 100 Chukchi 100 ? Pulse 2?

Coal Al R R Anticlinorium R Nanushuk

Colville Colville Basin Interpreted Reef Facies

Cretaceous Cretaceous

megacycle R Faulted Boundary

Lower Brookian Lower Torok Ap R BTu HALIP Pulse 1?

Upper Kalubik 125 Selli Distal Kalubik Wedge North Chukchi 125 Mass Transport Complex Late Post- R Bm B4 Lower Kalubik Rift Basin High Contraction Hydrocarbon Source Rock (? where inferred) H Kuparuk C Equivalent Kuparuk C Im- Brookian Thrusting V mediate R R Kuparuk A Kalubik Gamma Ray Marker Neocomian Post- B3 Alpine C & Foreland Flexure Spreading Bs Rift Basin JKu

Peaks of Oceanic Anoxic Events R LCu 150 Alpine A 150 L R Burger Sub-Basin Nuiqsut Gas Pay B2 Popcorn R

Basins Nechelik Proven reservoir

- Rifting & Oil Pay

Trough

Volcanism Rift ClimaxRift M Sub Gas Show

Remnant Burger-Klondike MJu Simpson? R Potential reservoir

Beaufortian 175 ? Salt? Arch 175 Oil Show

Jurassic Jurassic MJu Valanginian boundaries Simpson? Thermal Bulging E R B1 B1-B4 Beaufortian T-R sequences Sherwood Basin Barrow Basin Rifting Canada (south of section) PPu Pre-Pliocene unconformity 200 R ? 200 Sherwood Basin Sherwood Sag River

? R ? TEu Terminal Eocene unconformity

KPu Cretaceous-Paleocene unconformity L Crackerjack BBcc Passive Margin Shublik Fault Subsidence ECu Intra-Early Cenomanian unconformity

225 225 Triassic Triassic BTu Base Torok unconformity

LCu Lower-Cretaceous unconformity M R Ivishak Kavik JKu Jurassic-Cretaceous unconformity

E 250 R 250 Sadlerochit L R R Echooka MJu Middle Jurassic unconformity Proto-Arctic Crackerjack PEu

Platform Uplift BBcc Base Beaufortian correlative conformity

M Ridge Hanna Sag Basin Permian PEu Pre-Echooka unconformity 275 transitional 275

R sequence PLu Pre-Lisburne unconformity

Permian Permian

E Bu Basement unconformity Hanna Sag Sag Basin Hanna Ellesmerian R HALIP High Arctic Large Igneous Province 300 300 Lisburne

P Line Of Section

Hanna Sag Basin Passive Margin R R Subsidence Popcorn 325 ? 325

M Carboniferous Carboniferous R

PLu Kayak

350 equiv. 350

R Crackerjack

R R

Hanna Trough

Hanna Trough Endicott Ellesmerian

L Popcorn R ? Kekiktuk Diamond High Orogenic Collapse 375 Farther south on the Crackerjack & Rifting 375 Burger Ridge, parts of this section display Bu

karst fabric beneath the MJu. Arctic Devonian Devonian Platform Ellesmerian

M Orogenesis

- R R 400 Pearyan- 400

50 mi/80.5 km E Franklinian Klondike Pearya Terrane Franklinian Mega –Sequence on Laurentian Basement

Pearyan Basement Unconformity Depth

Franklinian Franklinian