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Archean - unnamed strata (1) |
Carboniferous - Badito formation (1) |
Cretaceous - Laramie formation; Trinidads formation; Pierre shale; Apishapa formation; Timpas formation; Carlile shale; Greenhorn limestone; Graneros shale; Dakota sandstone (1) |
Geology -- United States --Maps (1) |
Geology--Colorado--Huerfano County--Maps (1) |
Jurassic - Morrison formation (1) |
Neogene - Silver Mt. monzonite-porphyry; Nussbaum formation (1) |
Paleogene - Silver Mt. monzonite-porphyry; Cuchara formation; Poison Canyon formation (1) |
Triassic - Morrison formation (1) |