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Phonolite is an
uncommon shallow intrusive or
extrusive rock, of
intermediate chemical composition between felsic and mafic, with
texture ranging from...
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Tephriphonolite or tephri-
phonolite is a
mafic to
intermediate extrusive igneous rock in
composition between phonotephrite and
phonolite. It
contains 9–14% alkali...
- romanized: Ye’Åksum ḥāwelt) is a 4th-century CE, 24-metre (79 ft) tall
phonolite stele,
weighing 160
tonnes (160 long tons; 180
short tons), in the city...
- they are not
unlike granites, but dark
green varieties are also known.
Phonolite is the fine-grained
extrusive equivalent.
Nepheline syenites are silica-undersaturated...
- in the M****if
Central in France. It is made of a type of rock
called phonolite. It
rises to an
altitude of 1,551 m (5,089 ft), and its base contains...
- The
phonolite or
clinkstone of
northern Ethiopia is a shallow-seated
igneous rock. The
phonolites intruded and
punctured the
Mesozoic sedimentary rocks...
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Porphyritic tephriphonolite to
phonolite lavas of the
Caldera Rim group,
dated to 274,000–170,000
years ago
Phonolite lava
flows with
aegirine phenocrysts...
- phono-tephrite is a
strongly alkaline volcanic rock with a
composition between phonolite and tephrite. This
unusual igneous rock
contains 7–12%
alkali content...
-
mountain range. The
volcanoes consist mainly of basalt,
trachyte and
phonolite in the form of lava flows,
scoria and
hydrovolcanic formations. Volcanic...
-
stratigraphic and
petrographic description:
phonolite was
firstly erupted,
followed by a
tephritic phonolite and
finally a
phonolitic tephrite). According...
