Nassau Formation

Lustrous, soft green, yellowish-green and purple laminated chloritoid-chlorite phyllite (Mettawee Member).
State Massachusetts
Name Nassau Formation
Geologic age Lower Cambrian and Proterozoic Z
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhylliteLustrous, soft green, yellowish-green and purple laminated chloritoid-chlorite phyllite (Mettawee Member).
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); in the Taconic Allochthon
References
NGMDB product
Counties Berkshire