USGS Metamorphic lithology

Metamorphism

Metamorphism

Quartzite

Quartzite

Slate

Slate

SchistoseOrGneissoidGranite

Schistose or gneissoid granite

Schist

Schist

ContortedSchist

Contorted schist

SchistAndGneiss

Schist and gneiss

Gneiss

Gneiss

ContortedGneiss

Contorted gneiss

Soapstone,Talc,OrSerpentinite

Soapstone, talc, or serpentinite

TuffaceousRock

Tuffaceous rock

CrystalTuff

Crystal tuff

DevitrifiedTuff

Devitrified tuff

VolcanicBrecciaAndTuff

Volcanic breccia and tuff

VolcanicBrecciaOrAgglomerate

Volcanic breccia or agglomerate

ZeoliticRock

Zeolitic rock

BasalticFlows

Basaltic flows

Granite_2

Granite (2nd option)

BandedIgneousRock

Banded igneous rock

IgneousRock_1

Igneous rock (1st option)

IgneousRock_2

Igneous rock (2nd option)

IgneousRock_3

Igneous rock (3rd option)

IgneousRock_4

Igneous rock (4th option)

IgneousRock_5

Igneous rock (5th option)

IgneousRock_6

Igneous rock (6th option)

IgneousRock_7

Igneous rock (7th option)

IgneousRock_8

Igneous rock (8th option)

PorphyriticRock_1

Porphyritic rock (1st option)

PorphyriticRock_2

Porphyritic rock (2nd option)

Vitrophyre

Vitrophyre

Quartz

Quartz

Ore

Ore