Ordovician Lobster Mountain volcanic complex, andesite member

Ordovician Lobster Mountain volcanic complex andesite member
State Maine
Name Ordovician Lobster Mountain volcanic complex, andesite member
Geologic age Ordovician
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > AndesiteW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith U - Andesitic volcanic rocks
Comments Protolith T - rhyolitic volcanic rocks.
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 Piscataquis