Black Mountain pluton of the Guilford dome (VTDbmg;0)

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	NGMDB product page for 96860
Counties	Windham

Black Mountain pluton of the Guilford dome

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.