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Trachybasalt is a
volcanic rock with a
composition between trachyte and basalt. It
resembles basalt but has a high
content of
alkali metal oxides. Minerals...
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defined chemically.
Under the TAS classification,
hawaiite is
sodic trachybasalt, with a
silica content close to 49 wt%, a
total alkali metal oxide content...
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Trachybasalt –
Volcanic rock – A
volcanic rock with a
composition between basalt and
trachyte Hawaiite –
Volcanic rock – a
sodic type of
trachybasalt...
- the main
island of
Grande Terre. The
volcano is
composed primarily of
trachybasalt and was
active during the late Pleistocene.
Eruptives have been dated...
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formed between 150,000 and 200,000
years ago and
erupted picrobasalts,
trachybasalts, ankaramites, and basanites. They
reach as far as Lake
Chala and Taveta...
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trachyte or phonolite. The pot****ic
series evolves through trachybasalt or
leucite trachybasalt through tristanite or
leucite tristanite to pot****ic trachyte...
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eruptions of
highly mobile lava flows.
Volcanic rocks such as basalt,
trachybasalt, benmoreite, tristanite, mugearite,
trachyte and
rhyolite were deposited...
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upper ****emblage
consists of
randomly oriented alkali basalt, hawaiite,
trachybasalt, tristanite, mugearite,
benmoreite and
trachyte that are in the form...
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mineralogy to decide. Ph (Phonolite) S1 (
Trachybasalt)—*Sodic and pot****ic
variants are
Hawaiite and Pot****ic
Trachybasalt. S2 (Basaltic trachyandesite)—*Sodic...
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including the 2.4-2.2 Ma
Lemagarut and 2.25-2.0 Ma
Ngorongoro basalt-
trachybasalt-trachyandesite
volcanoes (Ngorongoro also
contains trachydacite) and...
