Igneous Rock(from fire)

Extrusive: Volcanic glass(Obsidian)

Extrusive: Basalt(ocean floor; ridges)

Extrusive: Pumice(volcanic explosions)

Intrusive: Granite(course crystals)

Intrusive: Dykes

MetamorphicChanged Rock

Metamorphic: Gneiss(Compressed Granite)

SedimentaryDeposit of eroded sediments

Sedimentary Rock

Sedimentary: Conglomerate (pebbles & sand)

Sedimentary: Sandstone(layers of sand & silt)