Categories

The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• Abandoned Names‏‎ (27 members)
• Abbott Formation‏‎ (24 members)
• Absaroka Sequence‏‎ (313 members)
• Alburnett Formation‏‎ (1 member)
• Alexandrian Series‏‎ (34 members)
• Ancell Group‏‎ (42 members)
• Atokan Series‏‎ (26 members)
• Aux Vases Sandstone‏‎ (4 members)
• Banner Formation‏‎ (22 members)
• Baylis Formation‏‎ (6 members)
• Bentonite‏‎ (2 members)
• Blackriveran Stage‏‎ (108 members)
• Blanding Formation‏‎ (2 members)
• Bond Formation‏‎ (30 members)
• Borden Siltstone‏‎ (4 members)
• Bulletin 104‏‎ (24 members)
• Bulletin 94‏‎ (57 members)
• Bulletin 95‏‎ (500 members)
• Cambrian System‏‎ (66 members)
• Canadian Series‏‎ (16 members)
• Carbondale Formation‏‎ (95 members)
• Caseyville Formation‏‎ (12 members)
• Cedar Bluff Limestone Group‏‎ (14 members)
• Cedar Valley Limestone‏‎ (10 members)
• Cenozoic Erathem‏‎ (217 members)
• Champlainian Series‏‎ (174 members)
• Chazyan Stage‏‎ (4 members)
• Chert‏‎ (4 members)
• Chert Gravel‏‎ (2 members)
• Chesterian Series‏‎ (80 members)
• Cincinnatian Series‏‎ (30 members)
• Circular 605‏‎ (112 members)
• Clay‏‎ (2 members)
• Clayton Formation‏‎ (2 members)
• Clore Formation‏‎ (8 members)
• Coal‏‎ (112 members)
• Conglomerate‏‎ (2 members)
• Cretaceous System‏‎ (20 members)
• Croixan Series‏‎ (60 members)
• Croxian Series‏‎ (2 members)
• Decorah Subgroup‏‎ (20 members)
• Desmoinesian Series‏‎ (178 members)
• Devonian System‏‎ (84 members)
• Dolomite‏‎ (6 members)
• Dresbachian Stage‏‎ (32 members)
• Dunleith Formation‏‎ (26 members)
• Dutchtown Limestone‏‎ (6 members)
• Eau Claire Formation‏‎ (8 members)
• Edenian Stage‏‎ (4 members)
• Edgewood Formation‏‎ (4 members)
• Elviran Stage‏‎ (38 members)
• Elwood Formation‏‎ (2 members)
• Embayment Megagroup‏‎ (32 members)
• Eminence Formation‏‎ (4 members)
• Enion Formation‏‎ (2 members)
• Eocene Series‏‎ (4 members)
• Equality Formation‏‎ (6 members)
• Fraileys Shale‏‎ (4 members)
• Franconia Formation‏‎ (6 members)
• Franconian Stage‏‎ (18 members)
• Galena Group‏‎ (56 members)
• Gasperian Stage‏‎ (28 members)
• Genevievian Stage‏‎ (16 members)
• Glasford Formation‏‎ (28 members)
• Glenwood Formation‏‎ (12 members)
• Golconda Group‏‎ (10 members)
• Grand Detour Formation‏‎ (16 members)
• Grand Tower Limestone‏‎ (10 members)
• Grover Gravel‏‎ (2 members)
• Gulfian Series‏‎ (15 members)
• Guttenberg Formation‏‎ (6 members)
• Hannibal Shale‏‎ (4 members)
• Henry Formation‏‎ (6 members)
• Holocene Series‏‎ (20 members)
• Hombergian Stage‏‎ (12 members)
• Hunton Limestone Megagroup‏‎ (112 members)
• Imported vocabulary‏‎ (7 members)
• Ironton Sandstone‏‎ (10 members)
• Joachim Dolomite‏‎ (14 members)
• Joliet Formation‏‎ (10 members)
• Kankakee Formation‏‎ (10 members)
• Kaskaskia Sequence‏‎ (241 members)
• Keokuk Limestone‏‎ (4 members)
• Kewanee Group‏‎ (103 members)
• Kewaunee Formation‏‎ (8 members)
• Kimmswick Subgroup‏‎ (36 members)
• Kinderhookian Series‏‎ (18 members)
• Kings Lake Formation‏‎ (6 members)
• Kinkaid Limestone‏‎ (6 members)
• Knobs Megagroup‏‎ (24 members)
• Knox Dolomite Megagroup‏‎ (58 members)
• Lake Michigan Formation‏‎ (7 members)
• Lemont Formation‏‎ (8 members)
• Limestone‏‎ (176 members)
• Lingle Formation‏‎ (12 members)
• Lower Devonian Series‏‎ (10 members)
• Mammoth Cave Limestone Megagroup‏‎ (68 members)
• Maquoketa Shale Group‏‎ (20 members)
• Mason Group‏‎ (22 members)
• Mattoon Formation‏‎ (38 members)
• Maysvillian Stage‏‎ (12 members)
• Mazon Creek‏‎ (1 member)
• Mazoncreek‏‎ (0 members)
• McCormick Group‏‎ (32 members)
• McLeansboro Group‏‎ (120 members)
• McNairy Formation‏‎ (4 members)
• Menard Limestone‏‎ (8 members)
• Mesozoic Erathem‏‎ (24 members)
• Middle Devonian Series‏‎ (50 members)
• Mifflin Formation‏‎ (12 members)
• Mississippian Subsystem‏‎ (178 members)
• Missourian Series‏‎ (74 members)
• Modesto Formation‏‎ (46 members)
• Morrowan Series‏‎ (14 members)
• Mounds Gravel‏‎ (2 members)
• Mt. Simon Sandstone‏‎ (16 members)
• Nachusa Formation‏‎ (8 members)
• New Albany Shale Group‏‎ (20 members)
• Niagaran Series‏‎ (20 members)
• Non-marine Sand, Clay, and Silt‏‎ (2 members)
• North Hill Group‏‎ (6 members)
• Okaw Group‏‎ (14 members)
• Oneota Dolomite‏‎ (6 members)
• Oolite‏‎ (4 members)
• Ordovician System‏‎ (227 members)
• Ottawa Limestone Megagroup‏‎ (164 members)
• Owl Creek Formation‏‎ (2 members)
• Paint Creek Group‏‎ (14 members)
• Paleocene Series‏‎ (6 members)
• Paleozoic Erathem‏‎ (925 members)
• Pearl Formation‏‎ (6 members)
• Pecatonica Formation‏‎ (14 members)
• Pennsylvanian Subsystem‏‎ (316 members)
• Peoria Silt‏‎ (2 members)
• Platteville Group‏‎ (62 members)
• Plattin Subgroup‏‎ (46 members)
• Pleistocene Series‏‎ (177 members)
• Pliocene Series‏‎ (6 members)
• Pope Megagroup‏‎ (96 members)
• Porters Creek Formation‏‎ (2 members)
• Post Creek Formation‏‎ (1 member)
• Potsdam Sandstone Megagroup‏‎ (18 members)
• Prairie du Chien Group‏‎ (14 members)
• Precambrian‏‎ (3 members)
• Producing Zones and Informal Names‏‎ (76 members)
• Quaternary System‏‎ (200 members)
• Quimbys Mill Formation‏‎ (8 members)
• Raccoon Creek Group‏‎ (9 members)
• Renault Limestone‏‎ (8 members)
• Richmondian Stage‏‎ (10 members)
• Ridenhower Formation‏‎ (8 members)
• Roxana Silt‏‎ (10 members)
• Salem Limestone‏‎ (10 members)
• Sandstone‏‎ (77 members)
• Sauk Sequence‏‎ (76 members)
• Scales Shale‏‎ (10 members)
• Shale‏‎ (49 members)
• Silurian System‏‎ (62 members)
• Soil‏‎ (16 members)
• Spechts Ferry Formation‏‎ (6 members)
• Spoon Formation‏‎ (51 members)
• Springville Shale‏‎ (4 members)
• St. Peter Sandstone‏‎ (8 members)
• Ste. Genevieve Limestone‏‎ (10 members)
• Tertiary System‏‎ (22 members)
• Tippecanoe Sequence‏‎ (272 members)
• Tiskilwa Formation‏‎ (6 members)
• Trempealeauan Stage‏‎ (24 members)
• Trentonian Stage‏‎ (60 members)
• Tuscaloosa Formation‏‎ (3 members)
• Ullin Limestone‏‎ (6 members)
• Upper Devonian Series‏‎ (14 members)
• Valmeyeran Series‏‎ (70 members)
• Virgilian Series‏‎ (18 members)
• Wadsworth Formation‏‎ (2 members)
• Wapsipinicon Limestone‏‎ (12 members)
• Wedron Group‏‎ (28 members)
• West Baden Group‏‎ (14 members)
• West Lebanon Formation‏‎ (1 member)
• Wilcox Formation‏‎ (2 members)
• Wilhelmi Formation‏‎ (6 members)
• Winnebago Formation‏‎ (8 members)
• Wise Lake Formation‏‎ (6 members)
• Wolf Creek Formation‏‎ (1 member)