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Fergusite

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A plutonic rock consisting of roughly 70% pseudoleucite (alkali feldspar, nepheline, kalsilite and minor analcime) and 30% pyroxene. Now defined modally as a variety of foidolite in QAPF field 15.


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Classification of FergusiteHide

Fergusite is in section 15 of the QAPF diagram.

Sub-divisions of FergusiteHide

Mineralogy of FergusiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
PseudoleucitePseudomorph after leucite.
PyroxeneA petrological term for Pyroxene Group.

References for FergusiteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for FergusiteHide

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