Ordovician gabbro/diorite/ultramafic rocks

Ordovician gabbro/diorite/ultramafic rocks
State Maine
Name Ordovician gabbro/diorite/ultramafic rocks
Geologic age Ordovician
Lithologic constituents
Major
Igneous > Plutonic > UltramaficU - Unmetamorphosed
Igneous > Plutonic > Dioritic > DioriteU - Unmetamorphosed
Igneous > Plutonic > Gabbroic > GabbroU - Unmetamorphosed
Comments U - Unmetamorphosed
Stratigraphic units includes: 11 - Ripogenus/Bean Brook pluton (ME079).
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.

Faul, H., Stern, T.W., Thomas, H.H., and Elmore, P.L.D., 1963, Ages of intrusion and metamorphism in the northern Appalachians: Am. Jour. Sci., v. 261, 9. 1-19.

NGMDB product
Counties Aroostook - Oxford - Penobscot - Piscataquis