Ordovician unnamed felsic volcanic rocks

Ordovician unnamed felsic volcanic rocks
State Maine
Name Ordovician unnamed felsic volcanic rocks
Geologic age Ordovician
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanicGS - Greenschist facies; Protolith T - rhyolitic volcanic rocks
Comments W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith A - 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.

NGMDB product
Counties Aroostook - Penobscot - Washington