Hoosac Formation

Aluminous rusty-weathering kyanite schist with distinctive quartz lenses and minor thin beds of calc-silicate rocks.
State Massachusetts
Name Hoosac Formation
Geologic age Lower Cambrian and Proterozoic Z
Lithologic constituents
Major
Metamorphic > SchistAluminous rusty-weathering kyanite schist with distinctive quartz lenses.
Incidental
Metamorphic > Metasedimentary > Calc-silicate-rockminor thin beds of calc-silicate rocks
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); east of Berkshire Highlands
References
NGMDB product
Counties Hampden