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Rhyolitoid

A rock classification type
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About RhyolitoidHide

Felsites (acid volcanic rocks) tentatively identified as rhyolite, with felsic minerals comprising >20% quartz and alkali feldspar/plagioclase 40-100%


Unique IdentifiersHide

Mindat ID:
50639
Long-form identifier:
mindat:1:1:50639:7
GUID
(UUID V4):
6879496d-89ac-485b-8afe-32764b307883

Classification of RhyolitoidHide

QAPF_V_2,3.png

Rhyolitic rocks appear in fields 2 and 3 in the QAPF diagram.

TAS_R.png

Rhyolitic rocks are found in field 'R' in the TAS diagram.

Sub-divisions of RhyolitoidHide

Mineralogy of RhyolitoidHide

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

Synonyms of RhyolitoidHide

Internet Links for RhyolitoidHide

mindat.org URL:
https://www.mindat.org/min-50639.html
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