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Syenitoid

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A coarse grained felsic igneous rock having an alkali-feldspar/plagioclase ratio from 0.9-0.35 and 0-20% quartz.


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Classification of SyenitoidHide

Rocks in sections 6,6*,6',7,7*,7',8,8* and 8' of the QAPF diagram.

Sub-divisions of SyenitoidHide

Mineralogy of SyenitoidHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparFeldspar Group minerals rich in Potassium or Sodium.
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteA series or subgroup of the Mica Group.

Pronounciation of SyenitoidHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Synonyms of SyenitoidHide

Internet Links for SyenitoidHide

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