Hoosac Formation

Light-gray to tan, albite-muscovite-calcite spangled schist.
State Massachusetts
Name Hoosac Formation
Geologic age Lower Cambrian and Proterozoic Z
Lithologic constituents
Major
Metamorphic > Schist > Mica-schistalbite-muscovite-calcite spangled schist
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); east of Berkshire Highlands
References
NGMDB product
Counties Berkshire