Igneous Rock
Intrusive- Formed through magma.
Intrusive forms underground. Extrusive- Formed by lava.
Is usually formed above ground.
Such as Diotite and Tuff
Metamorphic Rock
Foliated- Have layered bands
Non-foliated- Doesn't have layered bands.
Such as Gniess and Marble
Sedimentary Rock
Clastic-Formed from mechanical weathering debris
Chemical-Form when dissolved materials precipitate.
Such as Coal and Iron Ore
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