Coarse grained (igneous texture)

Can't see the crystals (igneous texture)

Froom organisms (sedimentary origin)

Sometimes limestone (sedimentary origin)

Low, light (igneous silica content)

High, dark (igneous silica content)

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Rock quiz terms

Earth Science

Question	Answer
Phanaretic	Coarse grained (igneous texture)
Aphanitic	Fine grained (igneous texture)
Glassy	Can't see the crystals (igneous texture)
Clastic	From sand (sedimentary origin)
Organic	Froom organisms (sedimentary origin)
Chemical	Sometimes limestone (sedimentary origin)
Felsic	Low, light (igneous silica content)
Mafic	High, dark (igneous silica content)