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Black Mountain pluton of the Guilford dome
Weakly foliated, light-gray to whitish-gray, garnet-biotite-muscovite granite, minor pegmatite, and aplite dikes (Dg). Rb/Sr muscovite age of 383±7 Ma (Naylor, 1971) and a U-Pb zircon upper- intercept age of 364±4 Ma, no. 48 (Aleinikoff and others, 2011). Devonian granitic rocks of southern Vermont. Part of the New Hampshire Plutonic Suite.
State |
Vermont |
Name |
Black Mountain pluton of the Guilford dome |
Geologic age |
Devonian |
Lithologic constituents |
Major
Igneous > Plutonic > Granitic > GraniteWeakly foliated, light-gray to whitish-gray, garnet-biotite-muscovite granite.
Minor
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite
Igneous > Plutonic > Granitic > Leucocratic-granitic > ApliteAplite dikes.
|
References |
Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.
https://pubs.er.usgs.gov/publication/sim3184 |
NGMDB product |
|
Counties |
Windham |