Igneous Rocks
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13 Terms
1
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rhyolite
extrusive
light with quartz
light colored
2
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andesite
matrix
extrusive
mainly plagioclase
3
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volcanic glass
neither intrusive or extrusive
light weight
no crystals
4
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pumice
fine grained
porous
usually light colored
5
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basalt
smooth
black
fine grained with tiny crystals
6
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phonolite
extrusive
no quartz
makes a high pitch sound with metal
7
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diorite
intrusive
coarse grained
no quartz
medium to dark
8
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aplite
intrusive
fine grained
light colored
9
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pegmatite
intrusive
coarse grained
blocky
10
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gabbro
intrusive
coarse grain
medium to dark
no biotite
11
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granite
intrusive
coarse grained
light range of colors
12
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syenite
intrusive
coarse grained
light colored
no quartz
13
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latite
porphyritic
coarse grained
usually light colored
Note 
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