Barber Hill stock - syenite (VTKbh;0)

Barber Hill stock - syenite

A small, 0.5-km-long, northwest-trending stock consisting of a coarse-grained alkali syenite core, a fine-grained quartz syenite border, and associated trachyte dikes (Kfd). K-Ar biotite age of 114±2 Ma (Armstrong and Stump, 1971). Part of the White Mountain Igneous Suite.

State	Vermont
Name	Barber Hill stock - syenite
Geologic age	Early Cretaceous
Lithologic constituents	Major Igneous > Plutonic > Syenitic > Quartz-syenite (Stock or pipe)A small, 0.5-km-long, northwest-trending stock consisting of a coarse-grained alkali syenite core, a fine-grained quartz syenite border. Igneous > Plutonic > Syenitic > Alkali-feldspar-syenite (Stock or pipe)A small, 0.5-km-long, northwest-trending stock consisting of a coarse-grained alkali syenite core, a fine-grained quartz syenite border.
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	Chittenden

Barber Hill stock - syenite

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.