| State | Maine |
|---|---|
| Name | Devonian granite-granodiorite (hornblende accessory mineral) |
| Geologic age | Devonian |
| Lithologic constituents | Major
Igneous > Plutonic > Granitic > Granitehornblende-biotite granite; U - Unmetamorphosed
Igneous > Plutonic > Granitic > Granodioritehornblende-biotite granodiorite; U - Unmetamorphosed
|
| Comments | U - Unmetamorphosed |
| Stratigraphic units | includes: 68 - Hartland pluton (ME108, ME079, 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.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.Dallmeyer, R.D., van Breeman, O., and Whitney, J.A., 1982, Rb-Sr whole rock and 40Ar/39Ar mineral ages of the Hartland stock, south-central Maine: a post-Acadian representative of the New Hampshire Plutonic Series: Am. Jour. Sci., v. 287, p. 79-93. |
| NGMDB product | |
| Counties | Somerset |