U.S. Geological Survey Geologic Investigations Series I-2799


Early Tuff Sheets


La Garita Caldera Cycle (27.6 Ma)



Bachelor Caldera Cycle (27.3 Ma)



Blue Creek and South River Caldera Cycle (27.2-27.1 Ma)


San Luis Caldera Complex (27.0-26.8 Ma)



Creede Caldera Cycle (26.7 Ma)


Miocene Basalt and Rhyolite of Hinsdale Formation

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