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INDEX
A
- Ancell Group
- Anna Shale Member
- Antioch Limestone Member
- Anvil Rock Sandstone Member
- Argyle Till Member
- Arsenal Member
- Ashmore Tongue
- Assumption Coal Member
- Athensville Coal Member
- Atokan Series
- Augusta Member
- Aux Vases Sandstone
B
- Babylon Sandstone Member
- Backbone Limestone
- Bailey Limestone
- Bankston Fork Limestone Member
- Banner Formation
- Batavia Member
- Batestown Member
- Battery Rock Sandstone Member
- Baylis Formation
- Beaver Bend Limestone Member
- Beech Creek Limestone
- Beecher Member
- Belgium Member
- Bernadotte Sandstone Member
- Berry Clay Member
- Bethel Sandstone
- Beverly Tongue
- Bevier Coal Member or Bed
- Bidwell Coal Member
- Big Clifty Sandstone Member
- Big Creek Shale Member
- Bilyeu Member
- Birds Member
- Blackriveran Stage
- Blanding Formation
- Blocher Shale
- Blodgett Member
- Blomeyer Member
- Bogota Limestone Member
- Boles Member
- Bond Formation
- Bonpas Limestone Member
- Borden Siltstone
- Brainard Shale
- Brandon Bridge Member
- Breezy Hill Limestone Member
- Brereton Limestone Member
- Briar Hill Coal Member
- Brickeys Member
- Briton Member
- Brush Coal Member
- Buckhorn Member
- Buelter Member
- Bunje Limestone Member
- Burlington Limestone
- Burroughs Limestone Member
C
- Cahokia Alluvium
- Calhoun Coal Member
- Cambrian System
- Canadian Series
- Canteen member
- Canton Shale Member
- Cape Limestone
- Capron Till Member
- Carbondale Formation
- Cardiff coal bed
- Carlinville Limestone Member
- Caseyville Formation
- Castlewood Member
- Cave Hill Shale Member
- Cayugan Series
- Cedar Bluff Limestone Group
- Cedar Valley Limestone
- Cenozoic Erathem
- Chalfin Member
- Champlainian Series
- Chana Member
- Chapel Coal Member
- Chapin Soil
- Charter Member
- Chazyan Stage
- Cheltenham Clay Member
C cont.
- Chesterian Series
- Chouteau Limestone
- Cincinnatian Series
- Clayton Formation
- Clear Creek Chert
- Clement Member
- Clermont Shale Member
- Clore Formation
- Coffeen Limestone Member
- Coggan Member
- Cohn Coal Member
- Colchester Coal Member
- Conant Limestone Member
- Cooper Limestone Member
- Copperas Creek Sandstone Member
- Cora Limestone Member
- Coralville Member
- County Line (Alburnett) silt
- Covel Conglomerate Bed
- Coxville Sandstone Member
- Cramer Limestone Member
- Crane Member
- Creal Springs Limestone Member
- Cretaceous System
- Croixan Series
- Crowleys Ridge Silt
- Curlew Limestone Member
- Cypress Sandstone
D
- Dane Member
- Danville Coal Member
- Davenport Member
- Davis Coal Member or Bed
- Davis Member
- Daysville Dolomite Member
- De Graff Coal Member
- De Long Coal Member
- Decorah Subgroup
- Defiance Member
- Degonia Sandstone
- Dekoven Coal Member or Bed
- Delafield Member
- Delavan Member
- Delwood Coal Member
- Dement Member
- Derby-Doerun Member
- Desmoinesian Series
- Devonian System
- Dix Limestone Member
- Dolton Member
- Downeys Bluff Limestone
- Dresbachian Stage
- Drummond Member
- Dubuque Formation
- Duncan Mills Member
- Dunleith Formation
- Dutch Creek Sandstone Member
- Dutchtown Limestone
- Dykersburg Shale Member
E
- 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
F
F cont.
- 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
G
- 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 or Bed
- Greenup Limestone Member
- Grigg tongue
- Grindstaff Sandstone Member
- Grove Church Shale
- Grover Gravel
- Gulfian Series
- Gunn Member
- Gunter Sandstone
- Guttenberg Formation
H
- 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