Rangeley Formation (VTSr;0)

Rangeley Formation

Interlayered, commonly rusty-weathering quartz-feldspar micaceous granofels and dark-gray mica schist containing porphyroblasts of garnet, staurolite, and kyanite. Calc-silicate lenses common in the granofels; granule and pebble metaconglomerate locally are present. Part of Piermont and other allochthons.

State	Vermont
Name	Rangeley Formation
Geologic age	Lower Silurian
Lithologic constituents	Major Metamorphic > Granoblastic > GranofelsInterlayered, commonly rusty-weathering quartz-feldspar micaceous granofels. Metamorphic > Schist > Mica-schistDark-gray mica schist containing porphyroblasts of garnet, staurolite, and kyanite. Minor Metamorphic > Metasedimentary > Calc-silicate-rockCalc-silicate lenses common in the granofels. Incidental Metamorphic > Metasedimentary > Metaclastic > MetaconglomerateGranule and pebble metaconglomerate locally are present.
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

Rangeley Formation

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.