Biotite-hornblende diorite and quartz-bearing diorite

Mostly foliated; intrudes Dl.
State Massachusetts
Name Biotite-hornblende diorite and quartz-bearing diorite
Geologic age Devonian
Lithologic constituents
Major
Igneous > Plutonic > Dioritic > DioriteBiotite-hornblende diorite and quartz-bearing diorite
Comments Part of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks)
References
NGMDB product
Counties Franklin - Hampden - Worcester