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
NGMDB product
Counties Addison - Chittenden - Rutland