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 |