| State | Maine |
|---|---|
| Name | Silurian New Sweden Formation |
| Geologic age | Silurian |
| Lithologic constituents | Major
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 |
| 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.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 |