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Additional
foidite
English Wikipedia - The Free Encyclopedia
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Foidolite
Foidolite
is a rare coarse-grained
intrusive
igneous rock
with a
feldspathoid
mineral content greater than 60%. Crystals of
alkali feldspar
,
plagioclase
,
biotite
,
amphibole
,
pyroxene
, and/or
olivine
may be present within the rock. The
volcanic
equivalents are termed
foidite
and
phonolitic or tephritic foidites
.
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