Ordovician Bluffer Pond Formation, rhyolite member

Ordovician Bluffer Pond Formation rhyolite member
State Maine
Name Ordovician Bluffer Pond Formation, rhyolite member
Geologic age Ordovician
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > RhyoliteW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith T - Rhyolitic volcanic rocks
Comments AB - Medium 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.

NGMDB product
Counties Piscataquis