Calc-silicate granofels and gneiss

Including calcitic or dolomitic chondrodite-diopside marble, coarse hornblende-plagioclase-diopside and diopside rock, locally containing beds of lustrous muscovite-kyanite sillimanite-garnet schist.
State Massachusetts
Name Calc-silicate granofels and gneiss
Geologic age Proterozoic Y
Lithologic constituents
Major
Metamorphic > Gneiss > Calc-silicate-gneisscalc-silicate granofels and gneiss
Metamorphic > Granoblastic > Granofelscalc-silicate granofels and gneiss
Minor
Metamorphic > Metasedimentary > Calc-silicate-rockcoarse hornblende-plagioclase-diopside and diopside rock
Metamorphic > Schist > Mica-schist > Muscovite-schistlocally containing beds of lustrous muscovite-kyanite sillimanite-garnet schist
Metamorphic > Metasedimentary > Metacarbonate > Marblecalcitic or dolomitic chondrodite-diopside marble
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); in Berkshire Highlands and Green Mountain Core
References
NGMDB product
Counties Berkshire - Hampden