-
alongside phonolites. Low-degree
partial melting of
underplates of
granitic material in
collisional orogenic belts may also
produce phonolites.
Phonolite is...
-
Tephriphonolite or tephri-
phonolite is a
mafic to
intermediate extrusive igneous rock in
composition between phonotephrite and
phonolite. It
contains 9–14% alkali...
- The
phonolite or
clinkstone of
northern Ethiopia is a shallow-seated
igneous rock. The
phonolites intruded and
punctured the
Mesozoic sedimentary rocks...
- melt
segregation in the
mineralogical evolution of
Cenozoic nephelinites/
phonolites from
Saghro (SE Morocco)".
Mineralogical Magazine. 73 (1). Mineralogical...
- 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...
-
alkaline igneous rocks such as
volcanic obsidians, rhyolites,
trachytes and
phonolites and
plutonic quartz syenites where it is ****ociated with amphiboles. Its...
-
other unusual igneous rocks such as carbonatite.
Nepheline syenites and
phonolites occur, for example, in Brazil, Canada, Cameroon, China, Greenland, Italy...
- deep
water along the
Cameroon Line. The
volcanic soils of
basalts and
phonolites,
dating to 3
million years, have been used for
plantation crops since...
-
composition between phonolite and
tephritePages displaying wikidata descriptions as a
fallback – A
volcanic rock with a
composition between phonolite and tephrite...
-
bears the same
relation to them as the
nepheline syenites have to the
phonolites. A leucite-augite rock,
resembling ijolite except in
containing leucite...
