ROCKS

basalt

• igneous

• fine grained

• aphanitic

• mafic

gabbro

• igneous

• very coarse grained

• phaneritic

• mafic

andesite

• igneous

• intermediate to coarse grained

• aphanitic

• intermediate

rhyolite

• igneous

• fine to very fine grained

• aphanitic

• felsic

pumice

• igneous

• vesicular

• felsic

tuff

• igneous

• fragmental

• pyroclastic

• felsic-mafic

granite

• igneous

• coarse grained

• phaneritic

• felsic

scoria

• igneous

• vesicular

• mafic

diorite

• igneous

• intermediate to coarse grained

• phaneritic

• intermediate

conglomerate

• sedimentary

• coarse grained

limestone

• sedimentary

siltstone

• sedimentary

limestone

• sedimentary

chert

• sedimentary

coal

• sedimentary

claystone

• sedimentary

sandstone

• sedimentary

slate

• metamorphic

• foliated

• fine grained

quartzite

• metamorphic

• non foliated

• very hard, interlocking quartz grains

gneiss

• metamorphic

• foliated

• banded with alternating light and dark

marble

• metamorphic

• non-foliated

• crystalline

phyllite

• metamorphic

• folliated

schist

• metamorphic

• foliated

serpentinite

• metamorphic