Ordovician - Precambrian Z Scarboro and Diamond Island formations

Ordovician - Precambrian Z Scarboro and Diamond Island formations
State Maine
Name Ordovician - Precambrian Z Scarboro and Diamond Island formations
Geologic age Ordovician - Precambrian Z
Lithologic constituents
Major
Metamorphic > Metasedimentary (Greenschist, Amphibolite)GS - Greenschist facies; E - Epidote-amphibolite facies; AA - Low rank amphibolite facies; AB - Medium rank amphibolite facies; AC - High rank amphibolite facies; Protolith C - Sulfidic/carbonaceous pelite
Comments AC - High rank amphibolite facies; Protolith N - Mafic to felsic volcanic rocks
Stratigraphic units Casco Bay 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.

NGMDB product
Counties Cumberland - Lincoln - Sagadahoc - York