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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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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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Trachybasalt –
Volcanic rock – A
volcanic rock with a
composition between basalt and
trachyte Hawaiite –
Volcanic rock – a
sodic type of
trachybasalt...
- phenocrysts. The
mafic series also
contain titanium magnetite and the
trachybasalts are
dominated by anorthosite-rich plagioclase. Rubidium,
strontium and...
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basaltic andesite.
Basalt has a
lower total content of
alkali oxides than
trachybasalt and most
basanites and tephrites.
Basalt generally has a composition...
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initially basic and
fluid lavas, but they
differentiated over time (
trachybasalts and phonolites),
which gave
place to more
explosive eruptions. The rifts...
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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...
- 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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highly mobile lava flows.
Volcanic rocks such as
alkali basalt, hawaiite,
trachybasalt, benmoreite, tristanite, mugearite, trachyte,
comendite and pantellerite...
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basalt as
eruption products.
Crater Basalt basalts include basanite and
trachybasalts.
Incompatible elements and rare-earth
elements are
enriched in these...
