Littleton Formation - metarhyolite (VTDlr;0)

Littleton Formation - metarhyolite

White-weathering, medium- to dark-gray, foliated and laminated, aphanitic to very fine grained granofels to schist or metatuff, welded tuff, and lithic tuff commonly with a few percent millimeter-size quartz and microcline phenocrysts. U-Pb zircon age of 407.5±3.9 Ma, no. 44 (Rankin and Tucker, 2000). Stratified rocks of the Bronson Hill arch and Sawyer Mountain belt.

State	Vermont
Name	Littleton Formation - metarhyolite
Geologic age	Lower Devonian
Lithologic constituents	Major Metamorphic > Granoblastic > GranofelsWhite-weathering, medium- to dark-gray, foliated and laminated, aphanitic to very fine grained granofels to schist. Metamorphic > Metaigneous > MetavolcanicMetatuff, welded tuff, and lithic tuff commonly with a few percent millimeter-size quartz and microcline phenocrysts. Metamorphic > SchistWhite-weathering, medium- to dark-gray, foliated and laminated, aphanitic to very fine grained granofels to schist.
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	Orange

Littleton Formation - metarhyolite

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.