-
phonolite and
tephritePages displaying wikidata descriptions as a
fallback – A
volcanic rock with a
composition between phonolite and
tephrite Picrite – Variety...
-
places basanite in the basanite/
tephrite field of the QAPF diagram.
Basanite is
further distinguished from
tephrite by
having a
normative olivine content...
-
Canary Islands. Ecuador:
Phenocrysts found in
alkaline extrusive rocks (
tephrite),
product of
effusive volcanism of the
Sumaco volcano, of
northeast Ecuador...
- researches. They
succeeded in
producing such
rocks as porphyrite, leucite-
tephrite,
basalt and dolerite, and
obtained also
various structural modifications...
- its
chemical composition. For example,
basanite is
distinguished from
tephrite by
having a high
normative olivine content.
Other refinements to the basic...
-
rebuilt and open for
travelers now. Pico do Fogo
consists of basanite,
tephrite, phonotephrite, clinopyroxene, amphibole, magnetite, olivine, melilite...
-
firstly erupted,
followed by a
tephritic phonolite and
finally a
phonolitic tephrite).
According to the
Smithsonian Institution's
Global Volcanism Program,...
-
silica content can
range from
ultramafic (nephelinites,
basanites and
tephrites) to
felsic (trachytes). They are more
likely to be
generated at greater...
- and
tephrites but less than
basaltic andesite.
Basalt has a
lower total content of
alkali oxides than
trachybasalt and most
basanites and
tephrites. Basalt...
- Machine’’. In:
Geowissenschaftiche Mitteilungen, Nr. 50,
december 2012,
page 102-103 "Welcome to GPS Geochemistry". GPS
Research Program.
California Institute...
