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Basalt

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A mafite containng mostly calcic plagioclase, pyroxene +/- olivine, foids, quartz


Classification of Basalt

Basalt appears in field 9 and 10 in the QAPF diagram.

Basalt is found in field B in the TAS diagram [glossary item missing].

Sub-divisions of Basalt

Mineralogy of Basalt

Essential minerals - these are minerals that are required within the classification of this rock:
Calcic plagioclaseA petrological term for plagioclase series feldspars dominant in calcium.
PyroxeneA petrological term for Pyroxene Group.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
FeldspathoidA family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too ...
Olivine(Mg,Fe2+)2SiO4
Silica > QuartzSiO2

Internet Links for Basalt

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