State | Maine |
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Name | Silurian Dennys Formation, mafic to felsic volcanic rock member |
Geologic age | Silurian |
Lithologic constituents | Major
Igneous > Volcanic > Mafic-volcanicGS - Greenschist facies; Protolith W - Mafic to felsic volcanic rocks
Igneous > Volcanic > Felsic-volcanicGS - Greenschist facies; Protolith W - Mafic to felsic volcanic rocks
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Comments | Secondary unit description from USGS Geologic Names lexicon (ref. ME078): Used as Kittery Formation of Merrimack Group. Consists of tan, calcareous metasandstone exhibiting graded bedding, and green phyllite. GS - Greenschist facies; Protolith K - Calcareous feldspathic sandstone |
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.Berry, W.B.N., and Boucot, A.J., 1970, Correlation of the North American Silurian Rocks: Geol. Soc. Amer., Special Paper 102, 289 p. |
NGMDB product | |
Counties | Washington |