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Craignurite

A rock subtype
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A local Hebridian name for a series of volcanic rocks occurring as cone sheets and ranging in composition from intermediate to acid, characterized by acicular and skeletal crystals of plagioclase, augite and hornblende in a felsic groundmass.


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Unique IdentifiersHide

Mindat ID:
51132
Long-form identifier:
mindat:1:1:51132:6

Classification of CraignuriteHide

Mineralogy of CraignuriteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > HornblendeAnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Pyroxene > Clinopyroxene > Augite(CaxMgyFez)(Mgy1Fez1)Si2O6

Internet Links for CraignuriteHide

References for CraignuriteHide

Reference List:
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