Ordovician - Precambrian Z Cushing Formation, quartzite

Ordovician - Precambrian Z Cushing Formation quartzite
State Maine
Name Ordovician - Precambrian Z Cushing Formation, quartzite
Geologic age Ordovician - Precambrian Z
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Quartzite (Amphibolite)E - Epidote-amphibolite facies; AB - Medium rank amphibolite facies; AC - High rank amphibolite facies; Protolith F - Quartz sandstone
Comments GS - Greenschist facies; Protolith X - Undetermined 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 Kennebec - Lincoln - Waldo