Diorite and gabbro

Complex of diorite and gabbro, subordinate metavolcanic rocks and intrusive granite and granodiorite.
State Massachusetts
Name Diorite and gabbro
Geologic age Proterozoic Z
Lithologic constituents
Major
Igneous > Plutonic > Dioritic > Diorite
Igneous > Plutonic > Gabbroic > Gabbro
Incidental
Igneous > Plutonic > Granitic > Granite
Igneous > Plutonic > Granitic > Granodiorite
Metamorphic > Metaigneous > Metavolcanicsubordinate metavolcanic rocks
Comments Part of Milford-Dedham Zone (Tertiary and Older Rocks)
References
NGMDB product
Counties Essex - Middlesex - Worcester