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Counties in Iowa
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Adair
Adams
Allamakee
Appanoose
Audubon
Benton
Black Hawk
Boone
Bremer
Buchanan
Buena Vista
Butler
Calhoun
Carroll
Cass
Cedar
Cerro Gordo
Cherokee
Chickasaw
Clarke
Clay
Clayton
Clinton
Crawford
Dallas
Davis
Decatur
Delaware
Des Moines
Dickinson
Dubuque
Emmet
Fayette
Floyd
Franklin
Fremont
Greene
Grundy
Guthrie
Hamilton
Hancock
Hardin
Harrison
Henry
Howard
Humboldt
Ida
Iowa
Jackson
Jasper
Jefferson
Johnson
Jones
Keokuk
Kossuth
Lee
Linn
Louisa
Lucas
Lyon
Madison
Mahaska
Marion
Marshall
Mills
Mitchell
Monona
Monroe
Montgomery
Muscatine
O'Brien
Osceola
Out of State
Page
Palo Alto
Plymouth
Pocahontas
Polk
Pottawattamie
Poweshiek
Ringgold
Sac
Scott
Shelby
Sioux
Story
Tama
Taylor
Union
Unknown
Van Buren
Wapello
Warren
Washington
Wayne
Webster
Winnebago
Winneshiek
Woodbury
Worth
Wright
Township
Select One
T65N
T66N
T67N
T68N
T69N
T70N
T71N
T72N
T73N
T74N
T75N
T76N
T77N
T78N
T79N
T80N
T81N
T82N
T83N
T84N
T85N
T86N
T87N
T88N
T89N
T90N
T91N
T92N
T93N
T94N
T95N
T96N
T97N
T98N
T99N
T100N
Range
Select One
R1E
R2E
R3E
R4E
R5E
R6E
R7E
R1W
R2W
R3W
R4W
R5W
R6W
R7W
R8W
R9W
R10W
R11W
R12W
R13W
R14W
R15W
R16W
R17W
R18W
R19W
R20W
R21W
R22W
R23W
R24W
R25W
R26W
R27W
R28W
R29W
R30W
R31W
R32W
R33W
R34W
R35W
R36W
R37W
R38W
R39W
R40W
R41W
R42W
R43W
R44W
R45W
R46W
R47W
R48W
R49W
Total Depth
to
Stratigraphy
Select One
Quaternary
Holocene Series
Deforest
Camp Creek
Roberts Creek
Turton Submember
Mullenix Submember
Gunder
Hatcher Submember
Watkins Submember
Corrington
Flack
Woden
West Okoboji
Pleistocene Series
Wisconsinan Episode
Peoria
Silt Facies
Sand Facies
Dows
Pilot Knob
Lake Mills
Morgan
Alden
Noah Creek
Sheldon Creek
Roxana/Pisgah
Illinoian Episode
Loveland
Glasford
Kellerville
Pre-Illinoian
Wolf Creek
Hickory Hills
Aurora
Winthrop
Alburnett
A Glacial Tills
Lava Creek B Volcanic Ash
B Glacial Tills
Mesa Falls Volcanic Ash
Huckleberry Ridge Volcanic Ash
C Glacial Tills
Tertiary
Salt & Pepper Sands
Cretaceous
"Manson"
"Upper Colorado"
Niobrara
Fort Benton ("Lower Colorado ")
Carlile Shale
Greenhorn Limestone
Graneros Shale
Dakota
Woodbury
Nishnabotna
Windrow
Ostrander
Iron Hill
Jurassic
Fort Dodge
Pennsylvanian (Subsystem Of Carboniferous System)
Wabaunsee
Wood Siding
Root
French Creek Shale
Jim Creek Limestone
Friedrich Shale
Stotler
Grandhaven Limestone
Dry Shale
Dover Limestone
Pillsbury
Nyman Coal
Zeandale
Maple Hill Limestone
Wamego Shale
Tarkio Limestone
Willard Shale
Emporia
Elmont Limestone
Harveyville Shale
Reading Limestone
Auburn Shale
Bern
Wakarusa Limestone
Soldier Creek Shale
Burlingame Limestone
Scranton
Silver Lake Shale
Rulo Limestone
Cedar Vale Shale
Elmo Coal
Happy Hollow Limestone
White Cloud Shale
Howard Limestone
Utopia Limestone
Winzeler Shale
Church Limestone
Aarde Shale
Nodaway Coal
Severy Shale
Shawnee
Topeka
Coal Creek Limestone
Holt Shale
Dubois Limestone
Turner Creek Shale
Sheldon Limestone
Jones Point Shale
Curzon Limestone
Iowa Point Shale
Hartford Limestone
Calhoun Shale
Deer Creek
Ervine Creek Limestone
Burroak Shale
Haynies Limestone
Larsh Shale
Rock Bluff Limestone
Oskaloosa Shale
Ozawkie Limestone
Tecumseh Shale
Lecompton
Avoca Limestone
King Hill Shale
Beil Limestone
Queen Hill Shale
Big Spring Limestone
Doniphan Shale
Spring Branch Limestone
Kanwaka Shale
Oread
Kereford Limestone
Heumader Shale
Plattsmouth Limestone
Heebner Shale
Leavenworth Limestone
Snyderville Shale
Toronto Limestone
Douglas
Lawrence
Cass Limestone
Shoemaker Limestone
Little Pawnee Shale
Haskell Limestone
Stranger
Iatan Limestone
Weston Shale
Lansing
South Bend Limestone
Kitaki Limestone
Gretna Shale
Little Kaw Limestone
Rock Lake Shale
Stanton
Stoner Limestone
Eudora Shale
Captain Creek Limestone
Vilas Shale
Plattsburg
Spring Hill Limestone
Hickory Creek Shale
Merriam Limestone
Kansas City
Lane Shale
Wyandotte
Argentine Limestone
Quindaro Shale
Liberty Memorial Shale
Iola
Raytown Limestone
Muncie Creek Shale
Paola Limestone
Chanute Shale
Dewey
Cement City Limestone
Quivira Shale
Pammel Park Limestone
Nellie Bly Shale
Cherryvale
Westerville Limestone
Wea Shale
Block Limestone
Fontana Shale
Bronson
Dennis
Winterset Limestone
Stark Shale
Canville Limestone
Galesburg Shale
Swope
Bethany Falls Limestone
Hushpuckney Shale
Middle Creek Limestone
Elm Branch Shale
Hertha
Sniabar Limestone
Mound City Shale
East Peru Limestone
Pleasanton
Manly-Guthrie Mountain Shale
Ovid Coal
Exline Limestone
Hepler Shale
Green Valley Coal
Marmaton
Lost Branch
Cooper Creek Limestone
Nuyaka Creek Shale
Sni Mills Limestone
Memorial Shale
Lenapah
Nowata Shale
Altamont
Worland Limestone
Lake Neosho Shale
Amoret Limestone
Bandera Shale
Farlington Limestone
Pawnee
Coal City Limestone
Mine Creek Shale
Myrick Station Limestone
Anna Shale
Labette
Mystic Coal
Marshall Coal
Stephens Forest
Higginsville Limestone
Blackwater Creek Shale
Houx Limestone
Clanton Creek Limestone
Little Osage Shale
Morgan School Shale
Summit Coal
Mouse Creek
Blackjack Creek Limestone
Excello Shale
Cherokee
Swede Hollow
Mulky Coal
Bevier Coal
Wheeler Coal
Ardmore Limestone
Oakley Shale
Whitebreast Coal
Floris
Carruthers Coal
Laddsdale Coal
Spoon
Kalo
Cliffland Coal
Blackoak Coal
Kilbourn
Caseyville
Wyoming Hill Coal
Wildcat Den Coal
Mississippian (Subsystem Of Carboniferous System)
Pella (Ste. Genevieve)
St. Louis
Waugh
Verdi
Yenruogis Sandstone
Croton
Spergen
Augusta
Warsaw
Keokuk
Bentonsport
Montrose Chert
Burlington
Cedar Fork
Haight Creek
Dolbee Creek
Sub-Augusta
Gilmore City
Humboldt Oolite
Alden Limestone
Iowa Falls Dolomite
Maynes Creek
Eagle City
Wassonville
North Hill
Chapin
Starrs Cave
Prospect Hill
Mccraney
Devonian
Yellow Spring (New Albany)
Maple Mill
English River
Saverton
Grassy Creek
Aplington
Sheffield
Sweetland Creek
Lime Creek
Owen
Cerro Gordo
Juniper Hill
Cedar Valley
Shell Rock
Nora
Rock Grove
Mason City
Lithograph City
Idlewild
Thunder Woman Shale
Andalusia
Osage Springs
State Quarry
Coralville
Iowa City
Gizzard Creek
Cou Falls
Little Cedar
Hinkle
Eagle Center
Chickasaw Shale
Bassett
Rapid
Curtis Bridge
Solon
Wapsipinicon
Pinicon Ridge
Davenport
Spring Grove
Kenwood
Otis
Cedar Rapids
Coggon
Spillville
Lake Meyer
Bertram
Devonian/Ordovician Undiff.
Silurian
Gower
Brady
Anamosa
Leclaire
Laporte City
Scotch Grove
Palisades-Kepler
Waubeek
Buck Creek Quarry
Welton
Johns Creek Quarry
Hopkinton
Picture Rock
Farmers Creek
Marcus
Sweeney
Waucoma
Blanding
Tete Des Morts
Mosalem
Tete Des Morts/Mosalem Undiff.
Ordovician
Maquoketa
Neda
Brainard Shale
Ft. Atkinson Limestone
Clermont Shale
Clermont-Brainard Undiff.
Elgin Limestone
Scales
Galena
Dubuque
Littleport
Luana
Frankville
Wise Lake
Stewartville
Sinsinawa
Dunleith
Wyota
Wall
Sherwood
Rivoli
Mortimer
Fairplay
Eagle Point
Beecher
St. James
Buckhorn
Decorah
Ion
Guttenberg
Spechts Ferry
Decorah/Platteville Undiff.
Decorah/Platteville/Glenwood Undiff.
Platteville
Quimbys Mill
Mcgregor
Pecatonica
Ancell
Glenwood
Starved Rock Sandstone
Harmony Hill
St. Peter Sandstone
Tonti
Readstown
Winneshiek Shale
Prairie Du Chien
Shakopee
Willow River
New Richmond
Oneota
Cambrian/Ordovician Undiff.
Cambrian
Jordan
Coon Valley
Waukon
Van Oser
Norwalk
St. Lawrence
Lodi
Black Earth
Tunnel City
Lone Rock
Reno
Tomah
Birkmose
Adel
Wonewoc
Ironton
Galesville
Bonneterre
Bonneterre/Eau Claire Undiff.
Eau Claire
Mt. Simon
Proterozoic
Sioux Quartzite
Washington County Quartzite
Cedar Rapids Quartzite
Hull Rhyolite
Harris Granite
Hawarden Granite
Camp Quest
Lemars Gneiss
Matlock Banded-Iron
Archean
Lyon County Gneiss
Unknown
Henry
Sabula