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Dacite (/ˈdeɪsaɪt/) is a
volcanic rock
formed by
rapid solidification of lava that is high in
silica and low in
alkali metal oxides. It has a fine-grained...
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although the
majority are of
intermediate composition (such as Santiaguito,
dacite-andesite,
present day) The
characteristic dome
shape is
attributed to high...
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characteristic mixture of
dacite and andesite,
while modern lava is very
diverse (ranging from
olivine basalt to
andesite and
dacite).: 214 St. Helens started...
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called the
Pagosa Peak
Dacite, made of
dacite that is very
similar to that of the Fish
Canyon Tuff. The
Pagosa Peak
Dacite,
which has characteristics...
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navigation is difficult, and a
false summit may
cause confusion.
Pagosa Peak
Dacite, a type of
pyroclastic rock that
originated in the La
Garita Caldera, is...
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working in the area were not there. By the time of the
climactic eruption,
dacite magma intruding into the
volcano had
forced the
north flank outward nearly...
- been
predominantly andesitic, but it has also
erupted large volumes of
dacite.
Magma produced in the
current cycle of
activity tends to be a
mixture of...
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ranges from 63 to 69 percent. The
dacite volcanic plugs, lava domes,
intrusive sheets, and
felsitic rhyolite-
dacite between Morro Rock and
Islay Hill...
- 'slate' or 'bluestone', a
metamorphic phyllite rock, with both
andesite and
dacite mineral composition.
Dacitic phyllite is a
predominant type of rock found...
- basalt, ferro-basalt,
tholeiitic basaltic andesite,
tholeiitic andesite,
dacite and rhyolite. The
variety of
basalt in the
series was
originally called...
