-
within the rock. The
volcanic equivalents are
termed foidite and
phonolitic or
tephritic foidites. Some
foidolites are a
potential source of aluminium...
-
mineral found in silica-poor
igneous rocks.
These include nepheline syenite,
foidite, and phonolite. It is
often found along with leucite, sodalite, pot****ium...
- haüyne (diameter
about 1 mm)
surrounded by a fine-grained groundm**** in a
foidite (volcanic rock) from
Melfi (Italy), as seen in thin
section under a petrographic...
-
melanite and nepheline. It is a
leucocratic variety of
analcimite (a
foidite).
Blairmorite has also been
described as an analcime-rich
variety of phonolite...
-
normative mineralogy to decide. U2 (Phonotephrite) U3 (Tephriphonolite) F (
Foidite)—When possible, classify/name
according to the
dominant feldspathoid. Melilitites...
-
comparable to
basalts of
Mount Etna and the
Hawaiian Islands, as well as the
foidite lavas of
Mount Nyiragongo and the
tephrite lavas of Nyamuragira. It is...
-
Alkali basalts have been
identified in the scoria, and the
occurrence of
foidite has been reported.
Minerals contained within these rocks include apatite...
- the
Leucite Hills of Swee****er County, Wyoming.
Wyomingites are
between foidite and tephri-phonolite in
composition (in the QAPF classification) and contain...
-
phonolite and its
minerals include aegyrite,
alkali feldspar, analcite,
foidite, leucite,
noselite and titanaugite. This
differences may be
caused by the...
- are
noticeable in the
Lurbun group.
These form the only
occurrence of
foidite in the field.
After a
period of dormancy,
volcanism resumed in the southern...
