Devonian granodiorite (hornblende accessory mineral)

Hornblende-biotite granodiorite
State Maine
Name Devonian granodiorite (hornblende accessory mineral)
Geologic age Devonian
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodioritehornblende-biotite granodiorite; U - Unmetamorphosed
Comments U - Unmetamorphosed
Stratigraphic units includes plutons: 2 - Priestly Lake; 10 - Katahdin (ME079, ME081, ME082, ME083); 15 - Center Pond (ME079, ME088); 20 - Onawa (ME079); 26 - Spider Lake/Seven Ponds/Chain of Ponds (ME093, ME089).
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.

Denning, A.S., and Lux, D.R., 1985, 40Ar-39Ar incremental release dating of two igneous bodies in the Katahdin batholith, north-central maine: Geol. Soc. Amer., Abs. with Prog., v. 17, p. 15.

Loiselle, M., Hon, R., and Naylor, R.S., 1983, Age of the Katahdin batholith, Maine: Geol. Soc. Amer., Abs. with Prog., v. 15, p. 146.

Naylor, R.S., Hon, R., and Fullagar, P.D., 1974, Age of the Katahdin batholith, Maine: Geol. Soc. Amer., Abs. with Prog., v. 16, p. 59.

Loiselle, M., Eriksson, S., Wones, D.R., and Sinha, A.K., 1983, Timing and emplacement of post-Acadian plutons in central and eastern Maine: Geol. Soc. Amer., Abs. with Prog., v. 15, p. 187.

Zartman, R.E., Hurley, P.M., Kruger, H.W., and Giletti, B.J., 1970, A Permian disturbance of K-Ar radiometric ages in New England: its occurrence and causes: Geol. Soc. Amer., Bull., v. 81, p. 3359-3374.

Lux, D.R., 1983, 40Ar - 39Ar mineral ages for several plutons from western Maine: Geol. Soc. Amer., Abs. with Prog., v. 15, p. 147.

NGMDB product
Counties Aroostook - Franklin - Penobscot - Piscataquis