Quinebaug Formation

Amphibolite, biotite and hornblende gneiss, felsic gneiss, and calc-silicate gneiss.
State Massachusetts
Name Quinebaug Formation
Geologic age Ordovician, Cambrian, or Proterozoic Z
Lithologic constituents
Major
Metamorphic > Amphibolite
Metamorphic > Gneissbiotite and hornblende gneiss, felsic gneiss, and calc-silicate gneiss
Comments Part of Nashoba Zone (Silurian and Older Rocks)
References
NGMDB product
Counties Worcester