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Archean - unnamed strata (1)
Cambrian - Ignacio quartzite (1)
Carboniferous - Cutler formation; Rico formation; Hermosa formation; Mola formation; Ouray limestone (1)
Devonian - Ouray limestone; Elbert formation (1)
Geology -- Colorado -- Hinsdale County -- Maps (1)
Geology -- Colorado -- Ouray County -- Maps (1)
Geology -- Colorado -- San Juan County -- Maps (1)
Geology -- United States --Maps (1)
Neogene - Burns latite; Eureka rhyolite; Picayune andesite; Silverton volcanic series undifferentiated; San Juan tuff; Telluride conglomerate; Potosi volcanic series (1)
Paleogene - Burns latite; Eureka rhyolite; Picayune andesite; Silverton volcanic series undifferentiated; San Juan tuff; Telluride conglomerate; Potosi volcanic series (1)