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Syenitoid

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Pegmatitic peralkaline syenite, etc.

Sagåsen Quarry, Sagåsen, Mørje, Porsgrunn, Telemark, Norway
Nepheline syenite pegmatite

Papeno'o Valley, Papeno'o, Tahiti Nui, Tahiti, Windward Islands, Society Islands, French Polynesia
Syenite, etc.

Wind Mountain, Cornudas Mts, Otero Co., New Mexico, USA
Pegmatitic peralkaline syenite, etc.

Sagåsen Quarry, Sagåsen, Mørje, Porsgrunn, Telemark, Norway
Nepheline syenite pegmatite

Papeno'o Valley, Papeno'o, Tahiti Nui, Tahiti, Windward Islands, Society Islands, French Polynesia
Syenite, etc.

Wind Mountain, Cornudas Mts, Otero Co., New Mexico, USA
Pegmatitic peralkaline syenite, etc.

Sagåsen Quarry, Sagåsen, Mørje, Porsgrunn, Telemark, Norway
Nepheline syenite pegmatite

Papeno'o Valley, Papeno'o, Tahiti Nui, Tahiti, Windward Islands, Society Islands, French Polynesia
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About SyenitoidHide

A coarse grained felsic igneous rock having an alkali-feldspar/plagioclase ratio from 0.9-0.35, 0-10% foids and 0-20% quartz.


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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