Black and white, well-layered hornblende-biotite-plagioclase gneiss and amphibolite

Contains irregular pods of diopside or cummingtonite-talc rock or amphibole calc-silicate, epidote-layered quartz-plagioclase gneiss near Hinsdale.
State Massachusetts
Name Black and white, well-layered hornblende-biotite-plagioclase gneiss and amphibolite
Geologic age Proterozoic Y
Lithologic constituents
Major
Metamorphic > Amphibolitehornblende-biotite-plagioclase gneiss and amphibolite
Metamorphic > Gneisshornblende-biotite-plagioclase gneiss and amphibolite; epidote-layered quartz-plagioclase gneiss near Hinsdale.
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); in Berkshire Highlands and Green Mountain Core
References
NGMDB product
Counties Berkshire