Metamorphosed granitoid rocks, undivided
Biotite quartz-plagioclase gneiss with minor interlayers of amphibolite gneiss and mica schist
Predominately metatuff
Mylonite gneiss
Biotite-quartz-plagioclase gneiss and interlayers locally containing hornblende, sillimanite, microcline, and muscovite
Gabbro - Greenwood pluton
Granite - Coronaca pluton
Gneissic biotite granite to granodiorite
Includes unmetamorphosed, undeformed biotite-hornblende diorite
Gabbro of Concord Plutonic Suite
White-mica schist and phyllite, metatuff, quartz-muscovite schist, and minor quartzite
Laminated metamudstone; contains Middle Cambrian or younger sponge spicules
Newberry granite
Thin to thick layered sillimanite-mica schist and sillimanite-bearing muscovite-biotite schist
Gabbro - McCormick pluton
Granite
Metagabbro and minor metadiorite
Amphibolite and amphibolite gneiss
Ultramafic rock
Phyllonite and phyllonitic schist