Silurian Dennys Formation, mafic to felsic volcanic rock member

Silurian Dennys Formation mafic to felsic volcanic rock member
State Maine
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
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