Biotite metadiorite (VTDd;0)

Biotite metadiorite

Biotite metadiorite in unit Dgq northeast of St. Johnsbury - Medium-light-bluish-gray, fine-grained, foliated and lineated. Part of other plutons of the New Hampshire Plutonic Suite.

State	Vermont
Name	Biotite metadiorite
Geologic age	Devonian
Lithologic constituents	Major Metamorphic > Metaigneous > Metaintrusive > MetadioriteBiotite metadiorite in unit Dgq northeast of St. Johnsbury - Medium-light-bluish-gray, fine-grained, foliated and lineated.
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	Caledonia

Biotite metadiorite

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.