Ordovician Winterville Formation

Ordovician Winterville Formation
State Maine
Name Ordovician Winterville Formation
Geologic age Ordovician
Lithologic constituents
Igneous > Volcanic > Mafic-volcanic > BasaltW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith V - basaltic volcanic rocks
Comments AA - Low rank amphibolite facies; AB - Medium rank amphibolite facies; Protolith M - Calcareous sandstone; interbedded sandstone and impure limestone

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.

Roy, D.C., and Mencher, E., 1976, Ordovician and Silurian stratigraphy of northeastern Aroostook County, Maine: Geol. Soc. Amer., Memoir 148, p. 25-52.

NGMDB product
Counties Aroostook