Devonian granite (hornblende accessory mineral) (MED1(h);0)

State	Maine
Name	Devonian granite (hornblende accessory mineral)
Geologic age	Devonian
Original map label	D1(h)
Comments	U - Unmetamorphosed
Primary rock type	granite
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granitehornblende-biotite 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. Hubacher, F., and Lux, D.R., 1985, Constraints on the time of Acadian deformation based on 40Ar-39Ar isotopic ages for two granitic plutons, northeastern Maine: Geol. Soc. Amer., Abs. with prog., v. 17, p. 25. Brookins, D.G., 1976, Geochronologic contributions to stratigraphic interpretation and correlation in the Penobscot Bay area, Maine: Geol. Soc. Amer., Memoir 148, p. 129-145. Wingard, P.S., and Brookins, D.G., 1964, Age of basic dikes on the Castine-Blue Hill peninsula, Maine: Geol. Soc. Amer., Spec. Paper 82, p. 226. Karner, F.R., pers. communication, in Brookins, 1976. Metzger, W.J., and Bickford, M.E., 1972, Rb-Sr chronology and stratigraphic relations of Silurian rocks, Mt. Desert Island, Maine: Geol. Soc. Amer., Bull., v. 83, p. 497-504. Brookins, D.G., and Spooner, C.M., 1970, The isotopic ages of the Oak Point and Stonington granites, eastern Penobscot Bay, Maine: Jour. Geol., v. 78, p. 570-575.
Geographic coverage	Aroostook - Hancock - Washington