Dunham Dolostone (VTCAdu;0)

Dunham Dolostone

Buff- and pink-mottled and massive, or light-gray, pinkish-gray-weathering, and massive to poorly bedded dolostone. Contains distinctive small pebbles and grains of well-rounded quartz; minor beds of dolostone-breccia and conglomerate occur near Rutland. Vermont Valley sequence and Middlebury synclinorium (above the Orwell and Champlain thrusts).

State	Vermont
Name	Dunham Dolostone
Geologic age	Lower Cambrian
Lithologic constituents	Major Sedimentary > Carbonate > DolostoneBuff- and pink-mottled and massive, or light-gray, pinkish-gray-weathering, and massive to poorly bedded dolostone; minor beds of dolostone-breccia and conglomerate. Minor Sedimentary > Clastic > Sedimentary-breccia (Bed)Dolostone-breccia. Sedimentary > Clastic > Conglomerate (Bed)Dolostone conglomerate.
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 - Bennington - Chittenden - Franklin - Rutland

Dunham Dolostone

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.