Hoosac Formation

Greenish chlorite-albite-magnetite-sericite-quartz schist and granofels.
State Massachusetts
Name Hoosac Formation
Geologic age Lower Cambrian and Proterozoic Z
Lithologic constituents
Major
Metamorphic > SchistGreenish chlorite-albite-magnetite-sericite-quartz schist and granofels.
Metamorphic > Granoblastic > GranofelsGreenish chlorite-albite-magnetite-sericite-quartz schist and granofels.
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); east of Berkshire Highlands
References
NGMDB product
Counties Berkshire - Franklin - Hampshire