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Phenocryst compositions of late ash-flow tuffs from the central San Juan caldera cluster

Phenocryst compositions of late ash-flow tuffs from the central San Juan caldera cluster

results from Creede drill-hole samples and implications for regional stratigraphy

By Peter W. Lipman

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Publish Date

2001

Publisher

U.S. Dept. of the Interior, U.S. Geological Survey

Language

eng

Pages

43

Description:

subjects: Boring,  Phenocrysts,  Volcanic ash, tuff

Places: Colorado,  Creede Formation (Colo.),  Creede Region