Igneous RocksIgneous Rocks

Igneous rocksIgneous rocks

Are rocks formed from Are rocks formed from solidified/cooled magmasolidified/cooled magma

Are made of Are made of interlocking crystalsinterlocking crystals

Interlocking crystals Interlocking crystals make strong rock make strong rock resistant to resistant to weatheringweathering and and erosionerosion

Igneous rock formationIgneous rock formation

Igneous rocksIgneous rocks

Contain Contain silicatesilicate mineralsminerals; atoms of ; atoms of silicon and oxygen and other silicon and oxygen and other mineralsminerals

Igneous rocksIgneous rocks

Are identified by 1) Are identified by 1) colorcolor 2) 2) crystal crystal sizesize

Intrusive igneous rockIntrusive igneous rock

Is rock formed/cooled Is rock formed/cooled insideinside the the earth’s crust earth’s crust

Cools slowlyCools slowly and forms and forms larger larger crystalscrystals

Vietnam veterans memorialVietnam veterans memorialblack graniteblack granite

Extrusive igneous rockExtrusive igneous rock

Rock that forms when Rock that forms when lava coolslava cools Cooling is faster so crystals form Cooling is faster so crystals form

more quickly and are smallermore quickly and are smaller

obsidianobsidian

basaltbasalt

Igneous RockIgneous Rock

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