Silurian New Sweden Formation

Silurian New Sweden Formation
State Maine
Name Silurian New Sweden Formation
Geologic age Silurian
Lithologic constituents
Sedimentary > Clastic > Mudstone (Calcareous)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith B - Calcareous pelite
Comments Mapped in Bronson Hill-Boundary Mountains anticlinorium. Includes mudstone, siltstone, calcareous slate, minor but conspicuous limestone conglomerate, and sparse limestone and medium-grained sandstone. Complex shelly fauna as well as ostracodes and trilobites were found at several localities in Spencer Lake 15-min quad. (ME004) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies; Protolith S - Calcareous pelite
Stratigraphic units Perham Group

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