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Ordovician Ammonoosuc Volcanics

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Ordovician Ammonoosuc Volcanics
State Maine
Name Ordovician Ammonoosuc Volcanics
Geologic age Ordovician
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanicAB - Medium rank amphibolite facies; Protolith W - Mafic to felsic volcanic rocks
Igneous > Volcanic > Mafic-volcanicAB - Medium rank amphibolite facies; Protolith W - Mafic to felsic volcanic rocks
Minor
Metamorphic > Metasedimentary (Amphibolite)AB - Medium rank amphibolite facies; Protolith W - Mafic to felsic volcanic rocks
Comments GS - Greenschist facies; E - Epidote-amphibolite facies; AA - Low rank amphibolite facies; AB - Medium rank amphibolite facies; AC - High rank amphibolite facies; Protolith C - Sulfidic/carbonaceous pelite
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.

US Geological Survey, 2005, National Geologic Map Database, Geologic Names Lexicon "GEOLEX", http://ngmdb.usgs.gov/Geolex/.
NGMDB product
Counties Oxford