U.S. Department of the Interior Open-File Report 2019–1145 U.S. Geological Survey Sheet 2 of 2 ALTITUDE RELATIVE TO HAL-T-2 SEA LEVEL, IN FEET UNIT GROUP ERATHEM SUPER- SYSTEM STAGE +93 ALTITUDE ALTITUDE ALTITUDE +100 ALTITUDE QUATER- Gelasian- Columbia Group WAS-OT-02 RELATIVE TO RELATIVE TO RELATIVE TO SELF CENO- NARY Calabrian F +65 HY-OT-6 MOBIL #3 ESSO #1 Nomini Yorktown LM-1 P SEA LEVEL, IN FEET SEA LEVEL, IN FEET RELATIVE TO SELF SEA LEVEL, IN FEET POTENTIAL RESISTIVITY ERATHEM STAGE SUPER- GROUP UNIT SYSTEM ERATHEM UNIT STAGE ZOIC NEOGENE Piacenzian Formation * G P SYSTEM SUPER- GROUP ERATHEM STAGE SUPER- GROUP UNIT P SYSTEM +9 H M +23 +16 +2 SEA LEVEL, IN FEET POTENTIAL RESISTIVITY ERATHEM STAGE SUPER- GROUP UNIT H 0 SEA LEVEL QUATER- Columbia M M 0 SEA LEVEL 0 SYSTEM 0 SEA LEVEL 0 Santo- Cape Fear F H NARY Tarantian Group SEA LEVEL -20 H F -24 nian Formation H G F H -75 Yorktown G Columbia Columbia 95 M -100 G Group Group -95 H F Formation Gelasian- Tarantian QUATER- NARY Ceno- M Zanclean L -156 and Piacenzian UPPER Gelasian- Tarantian L S QUATER- NARY Ancora -160 manian F-1* Burdigalian Pungo -175 NEOGENE -180 H and Langhian P LM-2 Gelasian- Tarantian River Fm. -200 * Yorktown Columbia Group CRETACEOUS S -200 -204 -200 -200 -200 QUATER- NARY MESOZOIC Clubhouse Formation -244 G Formation LM-2 * Basement lithology TD Castle G -272 PALEOZOIC? not reported -245 feet -300 LM-2* Hayne Yorktown -301 Piacen- Limestone G Formation G Figure 8. Stratigraphic column from the HAL-T-2 test well (northwesternmost well) used Trent Nomini zian Zone 2 Lutetian and Bartonian G P , CENOZOIC -391 to construct A–A ; adapted and stratigraphically updated from plate 43 in Brown and -391 G G -400 G -400 Eastover -400 -400 Jericho Nomini G G Formation others (1972). Fossil datums are designated by asterisks (*) and are identified with their Zanclean and Piacenzian Danian Run G original letter (LM and F) and number designations from Brown and others (1972). PALEOGENE Formation G -478 NN15 G G G P A-2,5 -511 Nomini Abbreviations: LM, late Miocene (now Pliocene); TD, total depth; ?, age of basement * G -510 Maas- Peedee G lithology inferred but not confirmed. MM-4,5 trichtian Formation G NEOGENE Pungo * P St. Marys MM-5,6 -601 -600 River -600 -600 * -600 Donoho B-1 * G NN15 P P Formation MM-5 * Nomini Creek B-11 * G Formation NEOGENE Tortonian Messinian Zanclean NN15 G P Formation Zone 1 -691 P P C-1 * G D -697 NN15 G Burdigalian D G and Langhian Zanclean NN15 Caddin P P -743 Formation G Rupel- lower River P m-l Miocene Campanian -800 ian reworked dinos Bend Fm. -800 Formation Yorktown G -816 -800 G -800 Shepherd -839 MM-1 * NN14-15 Black Creek Group G Grove G MM-7 * NEOGENE NN14-15 Formation -918 CENOZOIC G Pungo River Formation NN14-15 G Ancora P G Burdigalian and Langhian P G G G -1,000 -1,000 -995 -1,000 -975 -1,000 H G upper River P D-1 * -1,041 Chattian H L Castle MM-1,7 * Bend Fm. P CENOZOIC Santonian -1,080 L H P Trent Hayne G H Rupelian lower River Limestone ME-8 G P -1,165 * Bend Fm. P P H -1,171 Pleasant Creek Formation H -1,200 -1,200 UPPER CRETACEOUS G -1,200 -1,200 -1,248 H G unnamed ME-1 Pungo River Formation Turonian * Burdigalian and Langhian formation Lutetian and Bartonian H GG P P S -1,351 G G PALEOGENE G G -1,360 Edisto Fm. -1,400 -1,400 Chat- -1,370 G G -1,400 Chandler -1,400 -1,418 CENOZOIC tian Bridge Fm. G -1,415 E-1 * G Trent Ashley G P Clubhouse Formation Cenomanian Jericho H P-2 ME-8 Fm. P -1,565 Run * * S Castle Hayne Limestone G G -1,600 Formation -1,571 Danian -1,600 G -1,600 NP22 G -1,600 F-1 * S P-8,10 * G G G Harley- P G G Rupelian G PALEOGENE G G G Bend Formation River ville Fm. NP22 G MESOZOIC G G -1,670 Lutetian and Bartonian A-5 * G M Parkers -1,685 MQ-9 G H Peedee G Pria- Ferry Fm. 1-730-1,725 Formation A-2 * G G bonian NP17-18 -1,730 G G F -1,800 Maas- tricht- ian -1,772 -1,808 L L L -1,800 -1,800 Wood- P -1,800 -1,800 B-11 * M stock G Bladen G Fm. Mbr. G G H M G -1,884 ME-10 -1,903 Pota- * Cane paco ME-2,8 C-2 G Nanjemoy Formation G G * Acre Fm. * Mbr. -1,954 -2,000 -1,978 G P -2,000 Jericho P-8* G Caddin -2,000 -2,000 G G Fm. Run Fm. Trent Danian Ypresian G NP17-18 Campanian -2,092 -2,081 Black Creek Group Patapsco Formation Shepherd A-5 Albian D-1 M H * Peedee * NP17-18 Grove H Marquesas -2,200 -2,200 Fm. H Fm. -2,200 Maas- trichtian L -2,200 G G -2,200 H -2,230 -2,224 Donoho NP16 G G Creek NP16 and S G Fm. B-1,9* G G LOWER CRETACEOUS -2,320 m-l Eocene G H dinos -2,400 P Bladen -2,400 Castle Hayne Limestone -2,400 Lutetian Fm. G LE-1,3 * G -2,400 -2,436 PALEOGENE H Ancora Coach- G S man S Santonian Fm. G G F -2,528 NP16 G Campanian Patuxent Formation UPPER CRETACEOUS H Cane -2,600 Pleasant Creek Formation G G H Acre G -2,600 Fm. G -2,600 -2,600 -2,616 G FF G -2,673 H Caddin NP16 TD Group Black Creek B-11 G H Fm. * G G Basement lithology -2,674 feet -2,698 -2,700 NP16 G G not reported G G PALEO- ZOIC? Shepherd G P NP16 G -2,800 Grove , M -2,800 -2,800 Figure 9. Stratigraphic column from the WAS-OT-02 test well used to construct A–A ; Fm. Ancora G NP16 G G -2,845 unnamed adapted and stratigraphically updated from plate 30 in Brown and others (1972). Fossil formation P NP14 and -2,884 early-middle datums are designated by asterisks (*) and are identified with their original letter (A to P M Turonian Turonian Sunny Point Eocene dinos F) and number designations from Brown and others (1972). Abbreviations: Fm., Formation H M NP14? equivalent Formation; TD, total depth; ?, age of basement lithology inferred but not confirmed. -3,000 M -3,005 -3,000 -3,000 G Congaree Formation M E-1 * G G C-2 * G Santonian G NP13 and C-1 GM * Ypresian M early Eocene Clubhouse Formation -3,200 dinos * G Nanjemoy Formation, Woodstock Member M M -3,200 -3,200 -3,230 G B-3,9? -3,210 H Pleasant Creek Formation Cenomanian L G M MQ-10 M Campa- nian? F-5 -3,368 Caddin Formation B-11* * -3,400 D-1 * -3,381 G G CC17 -3,415 -3,400 G -3,400 M G H UPPER CRETACEOUS M G M H EXPLANATION Grove Black Creek Group Black Creek Shepherd unnamed Formation H -3,600 formation [Grain-size combinations are indicated by superposition of patterns] -3,600 M G -3,600 MESOZOIC -3,630 H C-1* G G MQ-9 Shell fragments S Turonian M G S E-1,2 * P Pyrite equivalent Formation G M -3,800 Sunny Point -3,801 -3,800 M -3,800 L C-2 G Lignite F * M Ancora G G Glauconite -3,920 Santonian M F Feldspar F -4,000 Clubhouse Formation -4,000 -4,000 D Diatoms -4,057 M Mica M G H MQ-8 G Albian Pleasant Creek Formation Pleasant Creek Calcareous sediment Cenomanian CC16 -4,200 H M M -4,200 -4,200 S G-9 MQ-10 Siderite * D-1 * M G -4,248 (Patapsco Formation marine equivalent) L L M M Abundant microfauna -4,295 M G-4 P * M -4,350 CC13b and Fragmentary limestone -4,400 -4,400 Albian-Cam- -4,400 panian dinos M Marquesas G-2 P MESOZOIC * P Phosphate unnamed formation P UPPER CRETACEOUS L Limonite M H Hematite -4,600 CC12 and -4,600 Turonian -4,600 G-3 * Albian-Cam- MQ-7 G-7 * panian dinos Coarse sand MQ-9 Medium sand LOWER CRETACEOUS M (Patuxent Formation marine equivalent) equivalent G-1 * Formation E-1* Sunny Point M -4,800 -4,800 -4,793 Fine sand -4,800 Gravel -4,895 M CC9c M Shell hash -4,954 M -5,000 -5,000 Clubhouse Formation Gravelly sand G-5,8 * -5,010 -5,000 G-1,4 * Clayey sand (sand>clay) L G Sandy clay (clay>sand) MQ-4 G -5,200 Cenomanian -5,200 -5,200 Clay MQ-8 CC9c Albian L MQ-10 CC9c M L Shale G-7 * (Patapsco Formation marine equivalent) G-6 * -5,337 M Siltstone Berriasian F S -5,400 M H-1 -5,412 -5,400 -5,390 -5,400 Anhydrite * G-2* Dolomite F G-3* MQ-1 F TD Coquina -5,560 feet (Waste Gate (Waste Fm. equivalent) CC9a/b (basement not reached) -5,600 Marquesas -5,600 -5,600 , M Limestone Figure 10. Stratigraphic column from the HY-OT-6 test well used to construct A–A ; Shell limestone adapted and stratigraphically updated from plate 30 in Brown and others (1972).