Well-layered hornblende-biotite gneiss

Well-layered hornblende-biotite gneiss .
State Massachusetts
Name Well-layered hornblende-biotite gneiss
Geologic age Proterozoic Y
Lithologic constituents
Major
Metamorphic > Gneisshornblende-biotite gneiss
Comments Part of Taconic-Berkshire Zone (Ordovician and Older Rocks); in Berkshire Highlands and Green Mountain Core
References
NGMDB product
Counties Berkshire - Hampden