Rowe Schist

Gray to black, fine-grained , slightly rusty, moderately carbonaceous schist; minor fine- to medium-grained dark-gray to white quartzite. Minor lenses of rock identical to OCAr.
State Massachusetts
Name Rowe Schist
Geologic age Lower Ordovician and Cambrian
Lithologic constituents
Major
Metamorphic > SchistGray to black, fine-grained , slightly rusty, moderately carbonaceous schist; minor lenses of rock identical to OCAr.
Minor
Metamorphic > Metasedimentary > Metaclastic > Quartziteminor fine- to medium-grained dark-gray to white quartzite
Comments Part of Rowe-Hawley Zone (Ordovician and Older Rocks). Despite uncertainties, age of Rowe is probably only slightly, if at all, older than earliest Cambrian and almost certainly no younger than Early or possibly Middle Ordovician (Stanley and Hatch, 1988) per MA014.
References
NGMDB product
Counties Berkshire - Franklin - Hampden - Hampshire