Orange-pink, rusty-weathering, medium- to coarse-grained biotite granite to granodiorite

Locally porphyritic. Intrudes Ssqd.
State Massachusetts
Name Orange-pink, rusty-weathering, medium- to coarse-grained biotite granite to granodiorite
Geologic age Silurian
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granitemedium- to coarse-grained biotite granite to granodiorite; locally porphyritic
Igneous > Plutonic > Granitic > Granodioritemedium- to coarse-grained biotite granite to granodiorite; locally porphyritic
Comments Part of Nashoba Zone (Silurian and Older Rocks)
References
NGMDB product
Counties Essex - Middlesex