Mount Abraham Formation - with minor porphyroblasts

Lustrous, silvery-green to bluish-gray, fine- to medium-grained, white mica-chloritoid-quartz-chlorite schist and phyllite, locally with minor garnet and magnetite porphyroblasts (CZap). Distinctive chlorite streaks and 1-cm rusty needles of altered kyanite are common. Rocks of the Rowe-Hawley Zone. Allochthonous cover sequence east of the Green Mountains: rift and drift stage metasedimentary and metavolcanic rocks and tectonic inclusions of ultramafic rocks.
State Vermont
Name Mount Abraham Formation - with minor porphyroblasts
Geologic age Cambrian and Neoproterozoic
Lithologic constituents
Major
Metamorphic > Schist > Mica-schistLustrous, silvery-green to bluish-gray, fine- to medium-grained, white mica-chloritoid-quartz-chlorite schist and phyllite, locally with minor garnet and magnetite porphyroblasts.
Metamorphic > Metasedimentary > Metaclastic > PhylliteLustrous, silvery-green to bluish-gray, fine- to medium-grained, white mica-chloritoid-quartz-chlorite schist and phyllite, locally with minor garnet and magnetite porphyroblasts.
References
NGMDB product
Counties Addison