Basalt (7)

TEXTURE: aphanitic ORIGIN: volcanic to shallow instrusive MINERALS: pyroxene, Ca-rich plagioclase feldspar, amphibole, olivine TYPE: igneous

Porphyritic Basalt (11)

TEXTURE: porphyritic ORIGIN: shallow intrusive MINERALS: pyroxene, Ca-rich plagioclase feldspar, amphibole, olivine TYPE: igneous

Andesite (4)

TEXTURE: light gray to dark ORIGIN: unknown? MINERALS: plagioclase feldspar, pyroxene, hornblende, biotite, quartz TYPE: igneous

Pumice (9)

TEXTURE: glassy to aphanitic ORIGIN: volcanic (frothy lava quickly quenched) MINERALS: unknown? TYPE: igneous

Gabbro (3)

TEXTURE: phaneritic ORIGIN: intrusive MINERALS: pyroxene, Ca-rich plagioclase feldspar, amphibole, olivine TYPE: igneous

Vesicular Basalt (12)

TEXTURE: aphanitic ORIGIN: volcanic (extrusive) MINERALS: pyroxene, Ca-rich plagioclase feldspar, amphibole, olivine TYPE: igneous

Granite (1)

TEXTURE: phaneritic ORIGIN: intrusive MINERALS: K-feldspar, quartz, Na-rich plagioclase feldspar, hornblende TYPE: igneous

Peridotite (6)

TEXTURE: phaneritic ORIGIN: mantle MINERALS: olivine, pyroxene TYPE: igneous

Diorite (2)

TEXTURE: phaneritic ORIGIN: intrusive MINERALS: plagioclase feldspar, pyroxene, hornblende, biotite, quartz TYPE: igneous

Obsidian (8)

TEXTURE: glassy ORIGIN: volcanic (extrusive) MINERALS: none TYPE: igneous

Rhyolite (10,5)

TEXTURE: aphanitic to porphyritic ORIGIN: volcanic (extrusive) MINERALS: quartz, K-feldspar, Na-rich plagioclase feldspar, biotite, hornblende TYPE: igneous

Schist (15,16)

TEXTURE: schistose ORIGIN: shale MINERALS: micas, garnet, quartz TYPE: metamorphic

Gneiss (18)

TEXTURE: compositional banding ORIGIN: granite, shale, arkose, others MINERALS: K-feldspar, quartz, amphibole TYPE: metamorphic

Phyllite/Metasiltstone (17)

TEXTURE: sheen, foliation ORIGIN: shale, siltstone MINERALS: micas, quartz, garnet TYPE: metamorphic

Slate (14,13)

TEXTURE: slatey cleavage ORIGIN: shale MINERALS: clays, quartz, micas TYPE: metamorphic

Quartzite (22)

TEXTURE: none ORIGIN: quartz sandstone MINERALS: quartz TYPE: metamorphic

Marble (23)

TEXTURE: none ORIGIN: limestone or dolostone MINERALS: calcite TYPE: metamorphic

Greenschist (19)

TEXTURE: fine-grained, foliated ORIGIN: basalt, gabbro MINERALS: chlorite, actinolite, plagioclase, epidote TYPE: metamorphic

Amphibolite (20)

TEXTURE: banded ORIGIN: basalt, gabbro MINERALS: amphiboles, feldspar TYPE: metamorphic

Metaconglomerate (21)

TEXTURE: random, ORIGIN: distorted bands MINERALS: random lithic clasts TYPE: metamorphic

Anthracite (24)

TEXTURE: none ORIGIN: peat, coal MINERALS: none TYPE: metamorphic

Arkosic sandstone (3)

TEXTURE: sand/well-sorted/sub-rounded ORIGIN: alluvial fan, river MINERALS: K-feldspar, quartz, iron oxides TYPE: sedimentary

Fossiliferous limestone (11)

TEXTURE: fossils ORIGIN: shallow marine MINERALS: calcium carbonate TYPE: sedimentary

Bituminous coal (12)

TEXTURE: shiny black ORIGIN: swamp MINERALS: hydrocarbons TYPE: sedimentary

Conglomerate (1)

TEXTURE: random stuff ORIGIN: alluvial fan, river, glacial till MINERALS: quartz, random stuff TYPE: sedimentary

Shale (9)

TEXTURE: clay/mud/well-sorted ORIGIN: lake, delta, deep marine MINERALS: clay, quartz, iron oxides TYPE: sedimentary

Siltstone (7)

TEXTURE: silt/medium sorting ORIGIN: river, shallow marine MINERALS: quartz, clay TYPE: sedimentary

Chert (10)

TEXTURE: smooth ORIGIN: deep marine, chemical precipitation in other rocks MINERALS: quartz TYPE: sedimentary

Limestone (8)

TEXTURE: smooth ORIGIN: shallow marine MINERALS: calcium carbonate TYPE: sedimentary

Quartz sandstone (2,4)

TEXTURE: sand/well-sorted/rounded ORIGIN: river, sand dune, beach, shallow marine MINERALS: quartz TYPE: sedimentary