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INDEX
A
  • Abbott Formation
  • Abernathy Member
  • Abingdon Coal Member
  • Absaroka Sequence
  • Afton Soil
  • Alburnett Formation
  • Alexandrian Series
  • Allard Limestone Member
  • Allenby Coal Member
  • Alto Formation
  • 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
B cont.
  • 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
  • Chesterian Series
  • Chouteau Limestone
  • Cincinnatian Series
  • Clayton Formation
  • Clear Creek Chert
  • Clement Member
C cont.
  • 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
  • Davis Member
  • Daysville Dolomite Member
  • De Graff Coal Member
  • De Long Coal Member
  • Decorah Subgroup
  • Defiance Member
  • Degonia Sandstone
  • Dekoven Coal Member
  • 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