Inequigranular, locally abundant potassic feldspar and garnet; interlayered and gradational with calc-silicate rock, sillimanite-mica schist, mica schist, and amphibolite. Contains small masses of granitic rock.
Garnet, staurolite, kyanite, or sillimanite occur locally; lenses and layers of quartz schist, micaceous quartzite, calc-silicate rock, biotite gneiss, amphibolite, and phyllite.
Equigranular to megacrystic, foliated to massive. Includes Toluca Granite.
Interlayered; minor layers and lenses of hornblende gneiss, metagabbro, mica schist, and granitic rock.
Poorly layered to massive; megacrysts of microcline and quartz; local mica schist, amphibolite, and biotite gneiss