"Dutchtown Limestone" "Dykersburg Shale Member" "Eagle Point Member" "Eastern Granite-Rhyolite Province (Basement)" "Eau Claire Formation" "Edenian Stage" "Edgewood Formation" "Effingham Limestone Member" "Eldena Member" "Elgin Shale Member" "Elm Member" "Elmhurst Sandstone Member" "Elviran Stage" "Elwood Formation" "Embayment Megagroup" "Eminence Formation" "Energy Shale Member" "Enion Formation" "Eocene Series" "Equality Formation" "Esmond Till Member" "Establishment Member" "Everett Member" "Everton Dolomite" "Excello Shale Member" "Exline Limestone Member" "Fairplay Member" "Farmdale Soil" "Farmington Shale Member" "Fern Glen Formation" "Finnie Sandstone Member" "Flannigan Coal Member" "Flat Creek Coal Member" "Ford Station Limestone Member" "Forreston Member" "Fort Atkinson Limstone" "Fort Payne Formation" "Fox Valley Member" "Fraileys Shale" "Francis Creek Shale Member" "Franconia Formation" "Franconian Stage" "Fredonia Limestone Member" "Friendsville Coal Member" "Fults Member" "Galatia Member" "Galena Group" "Galesville Sandstone" "Galum Limestone Member" "Garnavillo Member" "Gasperian Stage" "Geneva Dolomite Member" "Genevievian Stage" "Gentry Coal Bed" "Gila Limestone Member" "Gimlet Sandstone Member" "Girardeau Limestone" "Glasford Formation" "Glen Dean Limestone" "Glen Park Formation" "Glenburn Till Member" "Glencoe Member" "Glenhaven Member" "Glenwood Formation" "Golconda Group" "Gordonville Member" "Goreville Limestone Member" "Grand Detour Formation" "Grand Tower Limestone" "Granger Sandstone Member" "Grassy Creek Shale" "Grassy Knob Chert" "Grayslake Peat" "Greenbush Coal Member" "Greenup Limestone Member" "Grigg tongue" "Grindstaff Sandstone Member" "Grove Church Shale" "Grover Gravel" "Gulfian Series" "Gunn Member" "Gunter Sandstone" "Guttenberg Formation" "Hadley Gravel Member" "Haeger Member" "Hagarstown Member" "Hall Limestone Member" "Haney Limestone" "Hannibal Shale" "Hanover Limestone Member" "Hardinsburg Sandstone" "Harkness Silt Member" "Harmattan Till Member" "Harmony Hill Shale Member" "Harrodsburg Limestone Member" "Hazel Green Member" "Hazelwood Member" "Hegeler Till Member" "Hely Member" "Hennepin Member" "Henry Formation" "Hermon Coal Member" "Herrin Coal Member" "Hillery Till Member" "Hoing Sandstone Member" "Holocene Series" "Hombergian Stage" "Houchin Creek Coal Member" "Howardton Limestone Member" "Hulick Till Member" "Hunton Limestone Megagroup" "Inglefield Sandstone Member" "Ironton Sandstone" "Isabel Sandstone Member" "Jamestown Coal Member" "Joachim Dolomite" "Joliet Formation" "Joppa Member" "Jordan Sandstone" "Jules Soil" "Kankakee Formation" "Karnak Limestone Member" "Kaskaskia Sequence" "Kellerville Till Member" "Kenwood Member" "Kenyon Member" "Keokuk Limestone" "Kerton Creek coal bed" "Kewanee Group" "Kewaunee Formation" "Kidd Member" "Kimmswick Subgroup" "Kinderhookian Series" "Kingdom Sandstone Member" "Kings Lake Formation" "Kinkaid Limestone" "Kiser Creek Member" "Knobs Megagroup" "Knox Dolomite Megagroup" "Kress Member" "La Salle Limestone Member" "Lacey Member" "Lacon Formation" "Lagonda Member" "Lake Creek Coal Member" "Lake Michigan Formation" "Lake Michigan Member" "Lawson Shale Member" "Lee Center Till Member" "Lemont Formation" "Levias Limestone Member" "Levings Member" "Lierle Clay Member" "Lingle Formation" "Litchfield Coal Member" "Little Bear Soil" "Little Vermilion Limestone Member" "Livingston Limestone Member" "Lombard Dolomite Member" "Lonsdale Limestone Member" "Loughridge Sandstone Member" "Louisiana Limestone" "Loveland Silt" "Lovell Member" "Lower Devonian Series" "Mackinaw Member" "Macoupin Limestone Member" "Mahomet Sand Member" "Malden Till Member" "Mammoth Cave Limestone Megagroup" "Manitowoc Member" "Manley Coal Member" "Maquoketa Shale Group" "Marcus Formation" "Markgraf Member" "Markham Silt Member" "Marywood Member" "Mascoutah facies" "Mason Group" "Matson Member" "Mattoon Formation" "Mayfield Member" "Maysvillian Stage" "McClearys Bluff Coal Member" "McCraney Limestone" "McDonough Loess Member" "McLeansboro Group" "McNairy Formation" "McWain Sandstone Member" "Meadow Loess Member" "Mecca Quarry Shale Member" "Medusa Member" "Menard Limestone" "Meppen Limestone" "Merom Sandstone Member" "Mesozoic Erathem" "Metropolis Formation" "Metz Member" "Middle Devonian Series" "Mifflin Formation" "Millersville Limestone Member" "Mincke Member" "Misenheimer Shale Member" "Mississippian Subsystem" "Missourian Series" "Moccasin Springs Formation" "Modern Soil" "Modesto Formation" "Momence Sandstone Member" "Montrose Chert Member" "Mooseheart Member" "Moredock Member" "Morrowan Series" "Mortimer Member" "Morton Tongue" "Mosalem Formation" "Mounds Gravel" "Mt. Carmel Sandstone Member" "Mt. Rorah Coal Member" "Mt. Simon Sandstone" "Mulberry Grove Silt Member" "Murphysboro Coal Member" "Murray Bluff Sandstone Member" "Nachusa Formation" "Neda Formation" "Negli Creek Limestone Member" "New Albany Shale Group" "New Burnside Coal Member" "New Glarus Member" "New Haven Coal Member" "New London Member" "New Richmond Sandstone" "Niagaran Series" "Noix Oolite Member" "Nokomis Sandstone Member" "North Hill Group" "Nutwood Shale Member" "O'Nan Coal Member" "Oak Grove Limestone Member" "Oak formation" "Oakland Till Member" "Offerman Member" "Ogle Till Member" "Oglesby Member" "Okaw Group" "Omega Limestone Member" "Omphghent member" "Oneota Dolomite" "Opdyke Coal Member" "Orchard Creek Shale Member"