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Rock Types

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Summary

Geology... Want to learn about rock compositions?

The Rocks

PhotoRock NameRock TypeRock Composition
GraniteIgneousFelsic
RyoliteIgneousFelsic
DioriteIgneousIntermediate
BasaltIgneousMafic
GabbroIgneousMafic
ObsidianIgneousFelsic
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PhotoRock NameRock TypeRock Composition
ScoriaIgneousMafic
ConglomerateSedimentaryClastic
BrecciaSedimentaryClastic
SandstoneSedimentaryClastic
Arkosic SandstoneSedimentaryClastic
MudstoneSedimentaryClastic
Shale SedimentaryClastic
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Rocks II

PhotoRock NameRock TypeRock Composition
Oolitic LimestoneSedimentaryChemical
Micritic LimestoneSedimentaryChemical
Fossiliferous LimestoneSedimentaryChemical
ChalkSedimentaryChemical
ChertSedimentaryChemical
Rock SaltSedimentaryChemical
PeatSedimentaryOrganic
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PhotoRock NameRock TypeRock Composition
Bituminus CoalSedimentaryOrganic
CoquinaSedimentaryOrganic
SlateMetamorphicShale
PhylliteMetamorphicSlate
SchistMetamorphicAny Rock
GneissMetamorphicAny Rock
QuartziteMetamorphicSandstone or Chert
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Sources of Photos

http://geology.about.com
http://www.library.csi.cuny.edu
http://www.mineralauctions.com
http://www.drexel.edu
http://www.lakeneosho.org
http://www.dep.state.fl.us
http://www.beg.utexas.edu
http://www.marsonearth.org
http://www.gc.maricopa.edu
http://www.physicalgeography.net
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