Devonian granite (MED1b;0)

State	Maine
Name	Devonian granite
Geologic age	Devonian
Original map label	D1b
Comments	U - Unmetamorphosed
Primary rock type	granite
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granitebiotite granite U - Unmetamorphosed
Map references	Digital bedrock data downloaded from Maine Office of GIS in September 2005 from http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock Bedrock units table (publication date 11/15/2002) downloaded from same site. Permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006. [http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock]
Unit 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. Spooner, C.M., and Fairbairn, H.W., 1970, Relation of radiometric age of granitic rocks near Calais, Maine, to the time of the Acadian orogeny: Maine: Geol. Soc. Amer., Bull., v. 81, p. 3663-3670.
Geographic coverage	Franklin - Hancock - Oxford - Penobscot - Piscataquis - Washington