Rock Classification Review

Forms when water, usually seawater, evaporates and dissolved minerals crystallize.

• Chemical Sedimentary Rock

• Clastic Sedimentary Rock

• Extrusive Igneous Rock

• Foliated Metamorphic Rock

Rock that forms when lava erupts onto Earth's surface and cools/hardens.

• Intrusive Igneous Rock

• Organic Sedimentary Rock

• Extrusive Igneous Rock

• Nonfoliated Metamorphic Rock

Tags

NGSS.MS-ESS2-1

Forms when sediments are buried, compacted, and cemented together.

• Chemical sedimentary rocks

• Clastic sedimentary rocks

• intrusive igneous rocks

• nonfoliated metamorphic rocks

Metamorphic rocks in which mineral grains are arranged in planes or bands.

• foliated metamorphic rocks

• nonfoliated metamorphic rocks

• organic sedimentary rocks

• intrusive igneous rocks

Metamorphic rocks that do NOT have minerals grains that are aligned in planes or bands.

• foliated metamorphic rocks

• nonfoliated metamorphic rocks

• chemical sedimentary rocks

• extrusive igneous rocks

Rock that is formed when magma cools in chambers below Earth's surface.

• extrusive igneous rock

• intrusive igneous rock

• chemical sedimentary rock

• clastic sedimentary rock

Rock that forms from the remains or fossils of once living plants and animals.

• organic sedimentary rock

• clastic sedimentary rock

• foliated metamorphic rock

• nonfoliated metamorphic rock

Tags

NGSS.MS-LS4-1

This type of igneous rock has large, interlocking crystals.

• Intrusive

• Extrusive

This type of igneous rock has small, sometimes invisible crystals, and sometimes has holes.

• Intrusive

• Extrusive

This type of sedimentary rock often has names like rock salt or rock gypsum.

• Chemical

• Clastic

• Organic