Rhyolitoid
A rock classification type
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About Rhyolitoid
Felsites (acid volcanic rocks) tentatively identified as rhyolite, with felsic minerals comprising >20% quartz and alkali feldspar/plagioclase 40-100%
Unique Identifiers
Mindat ID:
50639
Long-form identifier:
mindat:1:1:50639:7
GUID
(UUID V4):
(UUID V4):
6879496d-89ac-485b-8afe-32764b307883
Classification of Rhyolitoid
Rhyolitic rocks appear in fields 2 and 3 in the QAPF diagram.
Rhyolitic rocks are found in field 'R' in the TAS diagram.
Sub-divisions of Rhyolitoid
Mineralogy of Rhyolitoid
Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
Silica > Quartz | SiO2 |
Synonyms of Rhyolitoid
Internet Links for Rhyolitoid
mindat.org URL:
https://www.mindat.org/min-50639.html
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Search Engines:
Sehoo Mountain, Fallon, Churchill County, Nevada, USA