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Quartz-trachyte

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Trachytic rocks, with felsics comprising 5-20% quartz and alkali feldspar/total feldspar 0.65-0.9


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Classification of Quartz-trachyteHide

QAPF_V_7-.png

Foid-bearing-trachyte appears in field 7' in the QAPF diagram.

Mineralogy of Quartz-trachyteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Silica > QuartzSiO2

Internet Links for Quartz-trachyteHide

 
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