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Devonian - Silurian Vinalhaven Rhyolite

Devonian - Silurian Vinalhaven Rhyolite
State Maine
Name Devonian - Silurian Vinalhaven Rhyolite
Geologic age Devonian - Silurian
Comments GS - Greenschist facies; Protolith W - mafic to felsic volcanic rocks
Primary rock type rhyolite
Secondary rock type
Other rock types
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > RhyoliteGS - Greenschist facies; Protolith W - mafic to felsic volcanic rocks
Map references
Digital bedrock data downloaded from Maine Office of GIS in September 2005 from http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock Bedrock units table (publication date 11/15/2002) downloaded from same site. Permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006.
Unit references
Osberg, P. H., Hussey, A.M., and Boone, G. M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.
Counties Knox