Ordovician granodiorite

Ordovician biotite granodiorite
State Maine
Name Ordovician granodiorite
Geologic age Ordovician
Lithologic constituents
Igneous > Plutonic > Granitic > Granodioritebiotite granodiorite; U - Unmetamorphosed
Comments U - Unmetamorphosed
Stratigraphic units includes plutons: 6 - Howe Brook; 25 - Skinner.

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 - Franklin - Somerset