Pinnacle Formation - metawacke member (VTCAZpw;0)

Pinnacle Formation - metawacke member

Gray- to light-brownish-gray-weathering, massive to bedded muscovite-biotite-chlorite metawacke, conglomerate, and blue-quartz pebbly phyllite, wacke and feldspathic quartzite. Cover rocks of the Lincoln Mountain massif and northwestern flank of the Green Mountain massif.

State	Vermont
Name	Pinnacle Formation - metawacke member
Geologic age	Cambrian and Neoproterozoic
Lithologic constituents	Major Sedimentary > Clastic > Conglomerate Metamorphic > Metasedimentary > Metaclastic > PhylliteBlue-quartz pebbly phyllite. Metamorphic > Metasedimentary > Metaclastic > Metasandstone > MetagraywackeGray- to light-brownish-gray-weathering, massive to bedded muscovite-biotite-chlorite metawacke. Minor Metamorphic > Metasedimentary > Metaclastic > Quartzite Sedimentary > Clastic > Sandstone > Graywacke
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 - Rutland

Pinnacle Formation - metawacke 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.