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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.
Classification of FergusiteHide
Sub-divisions of FergusiteHide
Mineralogy of FergusiteHide
Essential minerals - these are minerals that are required within the classification of this rock: