Silurian - Ordovician Nine Lake formation

Silurian - Ordovician Nine Lake formation
State Maine
Name Silurian - Ordovician Nine Lake formation
Geologic age Silurian - Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Bed)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith Q - Interbedded pelite and sandstone
Sedimentary > Clastic > Sandstone (Bed)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith Q - Interbedded pelite and sandstone
Comments W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith W - Mafic to felsic volcanic rocks
Stratigraphic units Hovey Group
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.

Pavlides, L., 1965, Geology of the Bridgewater quadrangle, Aroostook County, Maine: U.S. Geol. Surv., Bull. 1206, 72 p.

NGMDB product
Counties Aroostook