- 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 Franklinian Klondike E Pearya Terrane Franklinian Mega –Sequence on Laurentian Basement Pearyan Basement Unconformity Depth Franklinian .