Underhill Formation - greenstone and amphibolite member (VTCAZung;0)

Underhill Formation - greenstone and amphibolite member

Thinly bedded carbonate-albite-epidote greenstone and massive magnetite-albite-amphibole-biotite-epidote amphibolite; light- to dark-green, fine- to medium-grained epidote-chlorite albite-amphibole schist; dark-green, coarse-grained, weakly foliated epidote-biotite-albite-amphibole amphibolite. Cover rocks north of the Lincoln Mountain massif.

State	Vermont
Name	Underhill Formation - greenstone and amphibolite member
Geologic age	Cambrian and Neoproterozoic
Lithologic constituents	Major Metamorphic > Schist > Amphibole-schist (Amphibolite epidote-amphibolite)Light- to dark-green, fine- to medium-grained epidote-chlorite albite-amphibole schist. Metamorphic > Amphibolite (Amphibolite epidote-amphibolite)Massive magnetite-albite-amphibole-biotite-epidote amphibolite; dark-green, coarse-grained, weakly foliated epidote-biotite-albite-amphibole amphibolite. Metamorphic > Metaigneous > Greenstone (Amphibolite epidote-amphibolite)Thinly bedded carbonate-albite-epidote greenstone.
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	Addison - Chittenden - Franklin - Lamoille

Underhill Formation - greenstone and amphibolite member

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.