Categories

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

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• 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 (111 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)

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