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DRILLERS
CODE SYSTEM UNIT NAME TERM
000 Unknown Unknown or unassigned
100CNZN Cenozoic Cenozoic Era
110QTRN Cenozoic Quaternary System
111ALVM Cenozoic Alluvium
112PLSC Cenozoic Pleistocene Series
112GCDP Cenozoic Glacial deposits
112LOSS Cenozoic Loess
112CNTL Cenozoic Continental deposits
112HGLV Cenozoic High Level Fluvial Deposits
112LFTT Cenozoic Lafayette Gravel *
120TRTR Cenozoic Tertiary System
123OLGC Cenozoic Oligocene Series
123JCKS Cenozoic Jackson Fm
124EOCN Cenozoic Eocene Series
124CBWX Cenozoic Claiborne and Wilcox Fms Undif
124CLBN Cenozoic Claiborne Fm
124WLCX Cenozoic Wilcox Fm
125PLOC Cenozoic Paleocene Series
125PRCK Cenozoic Porters Creek Clay
125CLMCU Cenozoic Clayton and McNairy Fms Undif
125CLTN Cenozoic Clayton Fm
200MSZC Mesozoic Mesozoic Era
210CRCS Mesozoic Cretaceous System
211CRCSU Mesozoic Upper Cretaceous Series
211MCNR Mesozoic McNairy Fm
211TSCL Mesozoic Tuscaloosa Fm
300PLZC Paleozoic Paleozoic Era
310PRMN Permian Permian System
317PRMNL Permian Lower Permian Series
317MUZY Permian Mauzy Fm
320PNLV Pennsylvanian Pennsylvanian System
321PNLVU Pennsylvanian Pennsylvanian, Upper Part
321HNSH Pennsylvanian Henshaw Fm
321HSLM Pennsylvanian Henshaw & Lisman Fms Undif
321MCLB Pennsylvanian McLeansboro Group
321MGCG Pennsylvanian Monongahela and Conemaugh Fms Undif
321MNGL Pennsylvanian Monongahela Fm
321MTTN Pennsylvanian Matton Fm, McLeansboro Gp
321SRGS Pennsylvanian Sturgis Fm
321BOND Pennsylvanian Bond Fm, Mcleansboro Gp
321CNMG Pennsylvanian Conemaugh Fm
321LSMN Pennsylvanian Lisman Fm
321LVGS Pennsylvanian Livingston Ls Mbr, Bond Fm
321UNMC2 Pennsylvanian Unnamed Coal
321MBRY Pennsylvanian Member Y
321AMES Pennsylvanian Ames Ls Mbr, Conemaugh Fm
321CTHG Pennsylvanian Carthage Ls Mbr, Bond Fm
321MBRW Pennsylvanian Member W
321UNMC1 Pennsylvanian Unnamed Coal
321MBRV Pennsylvanian Member V
321PTOK Pennsylvanian Patoka Fm, McLeansboro Gp
321MDSV Pennsylvanian Madisonville Ls Mbr, Sturgis Fm
321SLBR Pennsylvanian Shelburn Fm, McLeansboro Gp
321WFKL Pennsylvanian West Franklin Ls Mbr, Shelburn Fm
321BRCK Pennsylvanian Brush Creek Ls Mbr, Conemaugh Fm
321BRCKC Pennsylvanian Brush Creek Coal
321MBRU Pennsylvanian Member U
321MBRT Pennsylvanian Member T
321PCNCU Pennsylvanian Upper Princess No. 9 Coal
321AVRK Pennsylvanian Anvil Rock Ss Mbr, Sturgis Fm
321PROV Pennsylvanian Providence Ls Mbr, Selburn Fm
324PNLVM Pennsylvanian Pennsylvanian, Middle Part
324WEIR Pennsylvanian Weir Ss *
324BRLE Pennsylvanian Breathitt & Lee Fms Undif *
324BRTT Pennsylvanian Breathitt Group
324CBDL Pennsylvanian Carbondale Fm
324PCNC Pennsylvanian Princess Fm
324PCNC9 Pennsylvanian Princess No. 9 Coal
324MBRS Pennsylvanian Member S, Princess Fm
324SPGC Pennsylvanian Springfield Coal Bed, Carbondale Fm
324PCNC8 Pennsylvanian Princess No. 8 Coal
324MBRR Pennsylvanian Member R, Princess Fm
324PCNC7 Pennsylvanian Princess No. 7 Coal
324MBRQ Pennsylvanian Member Q, Princess Fm
324PCNC6 Pennsylvanian Princess No. 6 Coal
324LMKL Pennsylvanian Limekiln Clay, Princess Fm
324LURL Pennsylvanian Laurel Coal
324OBRN Pennsylvanian Obryan Member, Princess Fm
324VNPR Pennsylvanian Vanport Ls *
324PCNC5 Pennsylvanian Princess No. 5A/5B Coal
324SEBR Pennsylvanian Sebree Ss Mbr, Carbondale Fm
324FRDG Pennsylvanian Flint Ridge Flint, Princess Fm
324RCRDC Pennsylvanian Richardson Coal Zone
324MBRP Pennsylvanian Member P, Princess Fm
324TPTPC Pennsylvanian Tiptop Coal Zone
324MBKO Pennsylvanian Main Block Ore, Princess Fm
324DVIS Pennsylvanian Davis Coal Bed, Carbondale Fm
324SNFK Pennsylvanian Stoney Fork Mbr, Princess Fm
324FRCR Pennsylvanian Four Corners Fm
324HNDMC Pennsylvanian Hindman Coal Zone
324BULN Pennsylvanian Bulan Shale Member, Four Corners Fm
324FRNCC Pennsylvanian Francis Coal Zone
324MBRO Pennsylvanian Member O, Four Corners Fm
324HZRD7 Pennsylvanian Hazard No. 7 Coal Zone
324ARNT Pennsylvanian Arnett Member, Four Corners Fm
324HZRD Pennsylvanian Hazard Coal Zone
324MBRN Pennsylvanian Member N, Four Corners Fm
324HDDX Pennsylvanian Haddix Coal Zone
324MGFN Pennsylvanian Magoffin Mbr, Four Corners Fm
324RCCK Pennsylvanian Raccoon Creek Gp
324TRCV Pennsylvanian Tradewater-Caseyville Fms Undif
324TRDT Pennsylvanian Tradewater Fm
324HYDN Pennsylvanian Hyden Fm
324TYLR Pennsylvanian Taylor Coal Zone
324MBRM Pennsylvanian Member M, Hyden Fm
324HMLN Pennsylvanian Hamlin Coal Zone
324MBRL Pennsylvanian Member L, Hyden Fm
324FRCLR Pennsylvanian Fire Clay Rider Coal Zone
324MBRK Pennsylvanian Member K, Hyden Fm
324FRCL Pennsylvanian Fire Clay Coal Zone
324MBRJ Pennsylvanian Member J, Hyden Fm
324WSBGU Pennsylvanian Upper Whitesburg Coal Zone
324MBRI Pennsylvanian Member I, Hyden Fm
324WSBGL Pennsylvanian Lower Whitesburg Coal Zone
324CRLW Pennsylvanian Curlew Ls Mbr, Tradewater Fm
324GRGR Pennsylvanian Granger Ss *
324KDCK Pennsylvanian Kendrick Sh Mbr, Hyden Fm
324TRDTA Pennsylvanian Tradewater "A" *
324AMBG Pennsylvanian Amburgy Member, Pikeville Fm
324AMBGU Pennsylvanian Upper Amburgy Coal Zone
324PKVL Pennsylvanian Pikeville Fm
324AMBGL Pennsylvanian Lower Amburgy Coal Zone
324EKFK Pennsylvanian Elkins Fork Sh, Pikeville Fm
324FINN Pennsylvanian Finnie Ss *
324LDCK Pennsylvanian Lead Creek Ls Mbr, Tradewater Fm
324TRDTB Pennsylvanian Tradewater "B" *
324DRBY Pennsylvanian Darby
324DWLE Pennsylvanian Dwale Shale, Pikeville Fm
324ELKU3 Pennsylvanian Upper Elkhorn No. 3 Coal Zone
324MBRH Pennsylvanian Member H, Pikeville Fm
324ELKU2 Pennsylvanian Upper Elkhorn No. 2 Coal Zone
324MBRG Pennsylvanian Member G, Pikeville Fm
324ELKU1 Pennsylvanian Upper Elkhorn No. 1 Coal Zone
324CBCK Pennsylvanian Campbell Creek Ls *
324CRMS Pennsylvanian Crummies Shale Member, Pikeville Fm
324ELKL Pennsylvanian Lower Elkhorn Coal Zone
324MBRF Pennsylvanian Member F, Pikeville Fm
324LBGC Pennsylvanian Little Blue Gem Coal Zone
324BELL Pennsylvanian Bell Coal Bed, Tradewater Fm
324NIGR Pennsylvanian Niagara Sand *
324TRDTC Pennsylvanian Tradewater "C" *
324WLBG Pennsylvanian Wheelersburg Shale, Pikeville Fm
324WLBGC Pennsylvanian Wheelersburg Coal
324BTSI Pennsylvanian Betsie Sh Mbr, Pikeville Fm
324TRDTD Pennsylvanian Tradewater "D" *
327PNLVL Pennsylvanian Pennsylvanian, Lower Part
327GRND Pennsylvanian Grundy Fm
327MNCRC Pennsylvanian Manchester Coal Zone
327VCLV Pennsylvanian Vancleve Member, Grundy Fm
327VCLVC Pennsylvanian Vancleve Coal
327LEE Pennsylvanian Lee Sandstone *
327CRBN Pennsylvanian Corbin Ss Mbr, Grundy Fm
327CSVL Pennsylvanian Caseyville Fm
327PRDG Pennsylvanian Partridge Shale Mbr, Grundy Fm
327MSONC Pennsylvanian Mason Coal Zone
327MLUS Pennsylvanian Molus Shale Mbr, Grundy Fm
327HAGYC Pennsylvanian Hagy Coal Zone
327MBRD Pennsylvanian Member D, Grundy Fm
327GRWKC Pennsylvanian Grayhawk Coal
327HZPC Pennsylvanian Hazel Patch Ss Mbr, Grundy Fm
327DVBC Pennsylvanian Dave Branch Shale, Grundy Fm
327CLFKC Pennsylvanian Clear Fork Coal Zone
327YLCK Pennsylvanian Yellow Creek Ss, Grundy Fm
327BEVR Pennsylvanian Beaver Sd *
327BIHLU Pennsylvanian Upper Biehl Ss *
327PNDS Pennsylvanian Pounds Ss Mbr, Caseyville Fm
327SALT Pennsylvanian Salt Sd *
327SALT1 Pennsylvanian 1st Salt Sd *
327WGES Pennsylvanian Wages *
327BIHLL Pennsylvanian Lower Biehl Ss *
327BSPR Pennsylvanian Bee Spring Ss Mbr, Caseyville Fm
327EPRS Pennsylvanian Epperson Sand *
327HRTN Pennsylvanian Horton *
327LVGS Pennsylvanian Livingston Cong *
327SALT2 Pennsylvanian 2nd Salt Sd *
327BRCK Pennsylvanian Bee Rock Ss Fm, Breathitt Gp
327BTRK Pennsylvanian Battery Rock Ss Mbr, Caseyville Fm
327JONS Pennsylvanian Jones Sand *
327PCRK Pennsylvanian Pine Creek Ss Mbr, Bee Rock Fm
327PIKE Pennsylvanian Pike Sd *
327SALT3 Pennsylvanian 3rd Salt Sd *
327BRFK Pennsylvanian Barren Fork Shale, Bee Rock Fm
327BRFKC Pennsylvanian Barren Fork Coal
327RCKC Pennsylvanian Rockcastle Ss Mbr, Bee Rock Fm
327MBRC Pennsylvanian Member C, Bee Rock Fm
327NESE Pennsylvanian Naese Coal
327AVCK Pennsylvanian Alvy Creek Fm
327HNSL Pennsylvanian Hensley Mbr, Alvy Creek Fm
327MDLB Pennsylvanian Middlesboro *
327BVCKC Pennsylvanian Beaver Creek Coal
327KNOX Pennsylvanian Knox Sd *
327KYRK Pennsylvanian Kyrock Cong Mbr, Caseyville Fm
327WMBG Pennsylvanian Williamsburg Sd *
327CLCF Pennsylvanian Coal Cliff Member, Alvy Creek Fm
327STRN2 Pennsylvanian Stearns No. 2 Coal Zone
327MBRA Pennsylvanian Member A, Alvy Creek Fm
327STRN1 Pennsylvanian Stearns No. 1 & 1.5 Coal Zone
327SEWN Pennsylvanian Sewanee Sandstone Fm, Breathitt Gp
327BMCK Pennsylvanian Bottom Creek Fm, Breathitt Gp
327DKRG Pennsylvanian Dark Ridge Mbr, Bottom Creek Fm
327CBGPC Pennsylvanian Cumberland Gap Coal Bed
327CDLL Pennsylvanian Chadwell *
327WRCK Pennsylvanian White Rocks Ss *
327WRNP Pennsylvanian Warren Point Ss Fm, Breathitt Gp
327PCNS Pennsylvanian Pocahontas Fm
330MSSP Mississippian Mississippian System
332MSSPU Mississippian Mississippian, Upper Part
332CSTRU Mississippian Chester (Kinkaid thru Tar Springs) *
332GVCC Mississippian Grove Church Sh
332BFLW Mississippian Buffalo Wallow Fm
332BLSN Mississippian Bluestone Fm
332KNKD Mississippian Kinkaid Ls
332LHFD Mississippian Leitchfield Fm
332PNGT Mississippian Pennington Gp
332PRID Mississippian Pride Shale Member
332PRNC Mississippian Princeton Sandstone
332HNTN Mississippian Hinton Fm, Pennington Gp
332LTSG Mississippian Little Stone Gap Mbr, Hinton Fm
332RVCF Mississippian Ravencliff Sd *
332MAXN Mississippian Maxon Sd *
332BRDL Mississippian Bradley Sd *
332DGON Mississippian Degonia Ss
332DGPL Mississippian Degonia/Clore/Palestine Undif *
332CLOR Mississippian Clore Ls
332PLSN Mississippian Palestine Ss
332CPMN Mississippian Chapman Sd (Stephens Sd) *
332MNRD Mississippian Menard Ls
332WLBG Mississippian Waltersburg Ss
332STGP Mississippian Stony Gap Mbr, Hinton Fm
332VINN Mississippian Vienna Ls
332BLFD Mississippian Bluefield Fm
332PRGN Mississippian Paragon Fm (Outcrop Belt)
332PRGUS Mississippian Upper Shale Member (Outcrop Belt)
332PRGLS Mississippian Limestone Member (Outcrop Belt)
332PRGDO Mississippian Dolostone Member (Outcrop Belt)
332PRGSS Mississippian Sandstone Member (Outcrop Belt)
332TSPG Mississippian Tar Springs Ss
332CTCV Mississippian Carter Caves Ss
332SLVL Mississippian Sloans Valley Member (Outcrop Belt)
332LTLM Mississippian Little Lime *
332PCCV Mississippian Pencil Cave *
332BIGL Mississippian Big Lime *
332BNGR Mississippian Bangor Ls
332CSTRM Mississippian Chester (Glen Dean thru Big Clifty) *
332GLND Mississippian Glen Dean Ls
332NWMN Mississippian Newman Ls
332NWMNU Mississippian Upper Part of Newman Ls
332SLDE Mississippian Slade Fm
332CVBR Mississippian Cave Branch Bed, Slade Fm
332HDBG Mississippian Hardinsburg Ss
332HRSL Mississippian Hartselle Fm
332JONS Mississippian Jones Sd *
332BIGL1 Mississippian Big Lime Zone 1 *
332GLCD Mississippian Golconda Fm
332HNEY Mississippian Haney Ls Mbr, Golconda Fm
332MNGL Mississippian Monteagle Ls
332KDDR Mississippian Kidder Ls Mbr, Monteagle Ls
332BGCF Mississippian Big Clifty Ss Mbr, Golconda Fm
332JCKS Mississippian Jackson Sd *
332BECE Mississippian Beech Creek Ls Mbr, Golconda Fm
332BIGL2 Mississippian Big Lime Zone 2 *
332BRLW Mississippian Barlow Ls *
332CSTRL Mississippian Chester (Beech Ck thru Renault) *
332GRKN Mississippian Girkin Fm
332CPRS Mississippian Cypress Ss
332ELWR Mississippian Elwren Ss
332PCEK Mississippian Paint Creek Gp
332PCEKU Mississippian Upper Paint Creek Ls *
332REVL Mississippian Reelsville Ls
332PCEKS Mississippian Paint Creek Sand *
332SMPL Mississippian Sample Ss
332BIGL3 Mississippian Big Lime Zone 3 *
332BVBD Mississippian Beaver Bend Ls
332PCEKL Mississippian Lower Paint Creek *
332PLBB Mississippian Paoli Ls to Beaver Bend Ls Undif
332BNST Mississippian Benoist *
332BTHL Mississippian Bethel Ss
332MRTN Mississippian Mooretown Fm
332MRTNS Mississippian Sandstone Mbr, Mooretown Fm
332POLI Mississippian Paoli Ls
332RLSL Mississippian Renault Ls to St. Louis Ls Undif *
332RLWW Mississippian Renault Ls to Warsaw Ls Undif *
332RNLT Mississippian Renault Ls
332RNLTL Mississippian Lower Renault *
333MSSPM Mississippian Mississippian, Middle Part
333BIGL4 Mississippian Big Lime Zone 4 *
333SGVV Mississippian Ste. Genevieve Ls
333SGVVM Mississippian Ste. Genevieve Ls Mbr, Monteagle Ls
333SGVVN Mississippian Ste. Genevieve Ls Mbr, Newman Ls
333LVIS Mississippian Levias Ls Mbr, Ste. Genevieve Ls
333AXVS Mississippian Aux Vases Mbr, Ste. Genevieve Ls
333RCLR Mississippian Rosiclare Ss Mbr, Ste. Genevieve Ls
333FRDN Mississippian Fredonia Ls Mbr, Ste Genevieve
333OHAR Mississippian O'Hara Lime *
333MCLK Mississippian McClosky Ls *
333MCLKA Mississippian McClosky "A" *
333MCLKB Mississippian McClosky "B" *
333MCLKC Mississippian McClosky "C" *
333STLS Mississippian St. Louis Ls
333STLSN Mississippian St. Louis Ls Mbr, Newman Ls
333RNFO Mississippian Renfro Mbr, Slade Fm
333SALM Mississippian Salem Ls
333SALMA Mississippian Salem 'A' zone *
333SLFP Mississippian Salem/Warsaw/Fort Payne Undif *
333SLWW Mississippian Salem/Warsaw Undifferentiated
333SALMB Mississippian Salem 'B' zone *
333SMRT Mississippian Somerset Sh
333HDBG Mississippian Harrodsburg Ls
333WRSW Mississippian Warsaw Fm
333SCCH Mississippian Science Hill Ss Mbr, Warsaw Fm
337MSSPL Mississippian Mississippian, Lower Part
337FTPN Mississippian Fort Payne Fm
337BRDN Mississippian Borden Fm
337INJN Mississippian Injun Sd *
337KENR Mississippian Keener *
337SBBL Mississippian Misc sands below the Big Lime *
337WVRL Mississippian Waverly Series
337CRDR Mississippian Corder *
337FTPNS Mississippian Fort Payne Stray *
337KNFL Mississippian Knifley Ss Mbr, Fort Payne Fm
337MLDH Mississippian Muldraugh Mbr, Borden Fm
337FLKB Mississippian Floyds Knob Bed, Borden Fm
337GRGR Mississippian Grainger Fm
337HLCW Mississippian Holtsclaw Slts Mbr, Borden Fm
337NADA Mississippian Nada Mbr, Borden Fm
337WLDE Mississippian Wildie Mbr, Borden Fm
337HLGP Mississippian Halls Gap Mbr, Borden Fm
337CWBL Mississippian Cowbell Mbr, Borden Fm
337NNCY Mississippian Nancy Mbr, Borden Fm
337BEVR Mississippian Beaver Ls *
337FRMR Mississippian Farmers Slts Mbr, Borden Fm
337WEIR Mississippian Weir Sd *
337WEIRS Mississippian Stray Weir *
337WEIR1 Mississippian 1st Weir *
337WEIR2 Mississippian 2nd Weir *
337WEIR3 Mississippian 3rd Weir *
337KNWD Mississippian Kenwood Slts Mbr, Borden Fm
337NPVC Mississippian New Providence Sh
337NPVCB Mississippian New Providence Sh Mbr, Borden Fm
337NPVCF Mississippian New Providence Sh Mbr, Ft Payne Fm
339RCKF Mississippian Rockford Ls
339SNBR Mississippian Sunbury Sh
339BRBD Mississippian Berea Ss and Bedford Sh Undif
339BREA Mississippian Berea Ss
339BDFD Mississippian Bedford Sh
339HNBL Mississippian Hannibal Sh
340DVNN Devonian Devonian System
340BBSI Devonian Berea/Black Shale Interval Combined *
341DVNNU Devonian Devonian, Upper Part
341CHAT Devonian Chattanooga Sh
341CLVD Devonian Cleveland Mbr, Ohio Sh
341GRCK Devonian Grassy Creek Mbr, New Albany Sh
341NALB Devonian New Albany Sh
341OHIO Devonian Ohio Sh
341TLBD Devonian Three Lick Bed, Ohio Sh
341HURN Devonian Huron Mbr, Ohio Sh
341HURNU Devonian Upper Huron Mbr, Ohio Sh
341SLMR Devonian Selmier Mbr, New Albany Sh
341HURNM Devonian Middle Huron Mbr, Ohio Sh
341HURNL Devonian Lower Huron Mbr, Ohio Sh
341OLNG Devonian Olentangy Mbr, Ohio Sh
341BLCR Devonian Blocher Mbr, New Albany Sh
341HRDN Devonian Hardin Ss *
341KNBL Devonian Knob Lick Sd *
341RNST Devonian Rhinestreet Mbr, Ohio Sh
344DVNNM Devonian Devonian, Middle Part
344BOYL Devonian Boyle Dol
344CORN Devonian "Corniferous" *
344CORN1 Devonian 1st Corniferous *
344OGHG Devonian Onondaga/Helderberg Undif
344ONDG Devonian Onondaga Ls
344SLBG Devonian Sellersburg Ls
344BCHD Devonian Beechwood Ls Mbr, Sellersburg Ls
344SVCK Devonian Silver Creek Ls Mbr, Sellersburg Ls
344CORN2 Devonian 2nd Corniferous *
344CORN3 Devonian 3rd Corniferous *
344CHCL Devonian Chert and Clay *
344GDTR Devonian Grand Tower Ls
344JFVL Devonian Jeffersonville Ls
344DCCK Devonian Dutch Creek Ss
347DVNNL Devonian Devonian, Lower Part
347CCEK Devonian Clear Creek Fm
347ORSK Devonian Oriskany Ss
347BKBN Devonian Backbone Ls
347HDBG Devonian Helderberg Ls
347GRKB Devonian Grassy Knob Ls
347FLGP Devonian Flat Gap Ls
347ROSS Devonian Ross Fm
350SLRN Silurian Silurian System
351SLRNU Silurian Silurian, Upper Part
351BILY Silurian Bailey Ls
351SALN Silurian Salina Fm
351RNDL Silurian Randol Shale
351DCTR Silurian Decatur Ls
355SLRNM Silurian Silurian, Middle Part
355BRPT Silurian Brownsport Fm
355LBLV Silurian Lobelville Ls Mbr, Brownsport Fm
355MSPG Silurian Moccasin Springs Fm
355BOB Silurian Bob Ls Mbr, Brownsport Fm
355BCRV Silurian Beech River Ls Mbr, Brownsport Fm
355DIXN Silurian Dixon Ls
355LCKP Silurian Lockport Dol
355LEGO Silurian Lego Ls
355LSVL Silurian Louisville Ls
355SCLR Silurian St. Claire Ls
355WLDR Silurian Waldron Sh
355BGSX Silurian Big Six Sd *
355BSHR Silurian Bisher Dol
355KEFR Silurian Keefer Ss
355LAUR Silurian Laurel Dol
357SLRNL Silurian Silurian, Lower Part
357CBOC Silurian Crab Orchard Fm
357CLNT Silurian Clinton Sh *
357OSGD Silurian Osgood Fm
357RHLL Silurian Rose Hill
357CLNTS Silurian Clinton Sd *
357BRSF Silurian Brassfield Dol
357SXCK Silurian Sexton Creek Ls
357TCRR Silurian Tuscarora Ss
360ODVC Ordovician Ordovician System
361ODVCU Ordovician Ordovician, Upper Part
361CMBD Ordovician Cumberland Fm
361DRKS Ordovician Drakes Fm
361JUNT Ordovician Juniata Fm
361MQKT Ordovician Maquoketa Sh
361PCVL Ordovician Preachersville Mbr, Drakes Fm
361SLUD Ordovician Saluda Mbr, Drakes Fm
361SQTC Ordovician Sequatchie Fm
361BRDS Ordovician Bardstown Mbr, Drakes Fm
361RLDN Ordovician Rowland Mbr, Drakes Fm
361ALCK Ordovician Ashlock Fm
361BLFK Ordovician Bullfork Fm
361MRBG Ordovician Martinsburg Fm
361RDVL Ordovician Reedsville Fm
361REBA Ordovician Reba Mbr, Ashlock Fm
361SNST Ordovician Sunset Mbr, Ashlock Fm
361TRRL Ordovician Terrill Mbr, Ashlock Fm
361GRLK Ordovician Grant Lake Ls
361SGCK Ordovician Stingy Creek Mbr, Ashlock Fm
361GLBR Ordovician Gilbert Mbr, Ashlock Fm
361TATE Ordovician Tate Mbr, Ashlock Fm
361CLCK Ordovician Calloway Creek Ls
361FRVW Ordovician Fairview Fm
361LPRS Ordovician Leipers Ls
361CLKO Ordovician Clays Ferry & Kope Fms Undif
361CLFR Ordovician Clays Ferry Fm
361CTYS Ordovician Catheys Fm
361GRNV Ordovician Granville *
361GRRD Ordovician Garrard Ss
361KOPE Ordovician Kope Fm
361PPLS Ordovician Point Pleasant Tongue, Clays Ferry
365ODVCM Ordovician Ordovician, Middle Part
365KMCK Ordovician Kimmswick Ls
365LXTN Ordovician Lexington Ls
365SBRK Ordovician Sunnybrook *
365TLGD Ordovician Tanglewood Ls Mbr, Lexington Ls
365TRNT Ordovician Trenton Ls *
365MLBG Ordovician Millersburg Mbr, Lexington Ls
365DVLH Ordovician Devils Hollow Mbr, Lexington Ls
365SLPW Ordovician Sulphur Well Mbr, Lexington Ls
365BRNN Ordovician Brannon Mbr, Lexington Ls
365PRVL Ordovician Perryville Ls Mbr, Lexington Ls
365GRIR Ordovician Grier Ls Mbr, Lexington Ls
365LOGN Ordovician Logana Mbr, Lexington Ls
365CDVL Ordovician Curdsville Ls Mbr, Lexington Ls
365SBRKL Ordovician Lower Sunnybrook *
365HGBG Ordovician High Bridge Gp
365MCAV Ordovician Mud Cave Bentonite, High Bridge Gp *
365PLTN Ordovician Plattin Ls
365STRV Ordovician Stones River *
365TYRN Ordovician Tyrone Ls, High Bridge Gp
365PCAV Ordovician Pencil Cave Bentonite, High Bridge *
365ORGN Ordovician Oregon Fm, High Bridge Gp
365MRFB Ordovician Murfreesboro *
365NLSN Ordovician Camp Nelson Ls, High Bridge Gp
365PCNC Ordovician Pecatonica Ls
365JCHM Ordovician Joachim Fm
365DTCN Ordovician Dutchtown Fm
365WLCK Ordovician Wells Creek Fm
365STPR Ordovician St. Peter Ss
365EVRN Ordovician Everton Fm
368ODVCL Ordovician Ordovician, Lower Part
368KNOX Ordovician Knox Gp
368KNOXU Ordovician Knox Gp, Upper Part
368BKMN Ordovician Beekmantown Dol, Upper Part Knox Gp
368CTTR Ordovician Cotter Dol, Upper Part Knox Gp
368JFRC Ordovician Jefferson City Dol, Upper Part Knox
368RBDX Ordovician Roubidoux Fm, Upper Part Knox Gp
368GSCD Ordovician Gasconade Dol, Upper Part Knox Gp
368GNTR Ordovician Gunter Ss, Upper Part Knox Gp
368RSRN Ordovician Rose Run Sd, Upper Part Knox Gp
370CMBR Cambrian Cambrian System
372CMBRU Cambrian Cambrian, Upper Part
372KNOXL Cambrian Knox Gp, Lower Part
372CPRG Cambrian Copper Ridge Dol, Lower Part Knox
372EMNC Cambrian Eminence Dol, Lower Part Knox Gp
372PTSI Cambrian Potosi Dol, Lower Part Knox Gp
372ELVN Cambrian Elvins Fm, Lower Part Knox Gp
375CMBRL Cambrian Cambrian, Lower Part
375ECLR Cambrian Eau Claire Fm
375CNSG Cambrian Conasauga Gp
375MDVL Cambrian Maynardsville Ls, Conasauga Gp
375NCCK Cambrian Nolichucky Sh, Conasauga Gp
375ROME Cambrian Rome Fm
375MTSM Cambrian Mt. Simon Ss
375SHDY Cambrian Shady Dol
375TMSN Cambrian Tomstown Dol
375BASL Cambrian "Basal Sand"
400PCMB Precambrian Precambrian Era
400BSLT Precambrian Basalt *
400MDLR Precambrian Middle Run Fm
400BSMN Precambrian PreCambrian Crystalline Basement