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Volcanic rocks in northwestern Colorado

Mainly of intermediate compositions
StateColorado
NameVolcanic rocks in northwestern Colorado
Geologic agePhanerozoic | Cenozoic | Tertiary
Original map labelTv
Primary rock typeintermediate volcanic r
Secondary rock type
Other rock types
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanicintermediate composition
Map references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Unit references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Geographic coverageGrand - Jackson - Larimer - Moffat - Routt - Summit

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