Geologic units in Greenville county, South Carolina

Sillimanite schist and sillimanite-mica schist (Cambrian or Neoproterozoic) at surface, covers 33 % of this area

Sillimanite-rich aluminous schist composed mainly of sillimanite, biotite, muscovite, and minor quartz

Migmatitic granitoid gneiss (Ordovician) at surface, covers 30 % of this area

Variably foliated, variably migmatitic, and granitic to quartz dioritic in composition

Reedy River complex (Paleozoic) at surface, covers 12 % of this area

Gneissic biotite granite to granodiorite

Megacrystic biotite gneiss (Cambrian or Neoproterozoic) at surface, covers 8 % of this area

Variably layered biotite-quartz-feldspar gneiss having porphyroclasts and/or porphyroblasts of plagioclase and locally of quartz and potassium feldspar

Gneissic granite of Greenville (Paleozoic) at surface, covers 7 % of this area

Granite gneiss

Biotite-plagioclase-quartz gneiss and biotite-muscovite schist (Cambrian or Neoproterozoic) at surface, covers 4 % of this area

Variably interlayered, containing subordinate layers of amphibolite and sillimanite-mica schist

Garnetiferous mica schist (Cambrian or Neoproterozoic) at surface, covers 3 % of this area

Aluminous muscovite-biotite schist, locally having subordinate amphibolite layers

Gneiss of Laurens area (Cambrian or Neoproterozoic) at surface, covers 1 % of this area

Biotite-quartz-plagioclase gneiss and interlayers locally containing hornblende, sillimanite, microcline, and muscovite

Caesars Head Granite (Ordovician to Silurian) at surface, covers 0.7 % of this area

Well foliated, banded to non-banded biotite granitoid gneiss or gneissic granitoid; cuts Seneca thrust fault

Granite gneiss (Silurian to Ordovician) at surface, covers 0.5 % of this area

Equigranular to inequigranular granite gneiss and augen gneiss, undivided

Biotite gneiss and muscovite-biotite gneiss (Cambrian or Neoproterozoic) at surface, covers 0.5 % of this area

Layered biotite-quartz-feldspar gneiss

Sillimanite-mica schist and muscovite-biotite schist (Cambrian or Neoproterozoic) at surface, covers 0.3 % of this area

Thin to thick layered sillimanite-mica schist and sillimanite-bearing muscovite-biotite schist

Gneissic granite of Starr (Silurian to Ordovician) at surface, covers 0.2 % of this area

Gneissic biotite granite to granodiorite of Starr pluton and nearby satellite plutons

Amphibolite and interlayered biotite gneiss, hornblende gneiss and minor mica schist (Cambrian or Neoproterozoic) at surface, covers 0.2 % of this area

Amphibolite and interlayered gneiss, hornblende gneiss and minor mica schist

Chauga River Formation and Poor Mountain Formation, undivided (Cambrian or Neoproterozoic) at surface, covers 0.1 % of this area

Chauga River Formation and Poor Mountain Formation, undivided

Garnet-Mica Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Interlayered with amphibolite.

Porphyroblastic Gneiss (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Massive to foliated, granodioritic, migmatitic.

Caesars Head Granite Gneiss (Devonian/Silurian) at surface, covers < 0.1 % of this area

Equigranular to porphyritic, massive to well foliated; contains biotite and muscovite.

Granite Gneiss (Silurian/Ordovician) at surface, covers < 0.1 % of this area

Poorly foliated; interlayered with biotite augen gneiss.

Henderson Gneiss (Cambrian) at surface, covers < 0.1 % of this area

Biotite granitoid augen gneiss having distinctive microcline augen; monzonite to granodiorite composition

Migmatitic Granitic Gneiss (Ordovician/Cambrian) at surface, covers < 0.1 % of this area

Foliated to massive, granitic to quartz dioritic; biotite gneiss and amphibolite common.

Mica Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Garnet, staurolite, kyanite, or sillimanite occur locally; lenses and layers of quartz schist, micaceous quartzite, calc-silicate rock, biotite gneiss, amphibolite, and phyllite.

Henderson Gneiss (Cambrian) at surface, covers < 0.1 % of this area

Monzonitic to granodioritic; inequigranular.