Devonian granodiorite - quartz syenite (porphyritic texture)

Devonian porphyritic biotite granodiorite to quartz syenite - porphyritic biotite granodiorite, porphyritic biotite tonalite, porphyritic alkali feldspar-biotite quartz syenite, and porphyritic biotite quartz syenite.
State Maine
Name Devonian granodiorite - quartz syenite (porphyritic texture)
Geologic age Devonian
Lithologic constituents
Comments U - Unmetamorphosed
Stratigraphic units includes: 34 - Lexington pluton (ME095, ME096).
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.

Gaudette, H.E., and Boone, G.M., 1985, Isotopic age of the Lexington batholith: constraints on timing of intrusion and Acadian metamorphism in western Maine: Geol. Soc. Amer., Abs. with Prog, v. 17, p. 19-20.

Naylor, R.S., 1973, Age of the Lexington batholith, Maine: Geol. Soc. Amer., Abs. with Prog., v. 5, p. 200.

NGMDB product
Counties Franklin - Somerset