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Tonalite | Send-To | Print | More
Category: Geology | 1313 views
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 © US Geological Survey

 Intrusive igneous rock made of plagioclase feldspar, quartz, and amphibole or biotite. May be similar to diorite but contains considerable quartz and is not as dark, and chemically has less calcium, iron and magnesium.
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Amphibolite
Biotite
Igneous Rock
Intrusive Rock
Plagioclase
Quartz
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