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Hyaloclastite is a
volcanoclastic ac****ulation or
breccia consisting of gl**** (from the Gr**** hyalus)
fragments (clasts)
formed by
quench fragmentation...
- (5 mi) wide. Most of the
volcano is
formed by
trachytic lava flows, but
hyaloclastite is also found. Snow, ice, and
glaciers cover most of
Mount Takahe. With...
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result of the much
higher fragmentation of
phreatomagmatic eruptions.
Hyaloclastite is gl****
found with
pillow basalts that were
produced by non-explosive...
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Hyaloclastite Dam was a 1,201 ft (366 m) high lava dam that
occupied the
Grand Canyon of the U.S.
state of Arizona. It
formed during the
Pleistocene epoch...
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subglacial volcanism. It can
contain pillow lava,
pillow breccia, hyalotuff,
hyaloclastite.
Examples are Skefilfjall, Kálfstindar,
Helgafell in
Iceland and Pillow...
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includes picrite pillows at the base,
followed by
tholeiitic lavas, then
hyaloclastites, then the
poikilitic sills. The CLF was
gradually uplifted until Eocene-Miocene...
-
curvilinear shards that
represent the
spalled rims of
pillow basalt (see:
Hyaloclastite). This
material is
commonly partly altered to chlorite, epidote, quartz...
- Hornblendite –
Plutonic rock
consisting mainly of the
amphibole hornblende Hyaloclastite –
Volcaniclastic ac****ulation or
breccia Icelandite –
Igneous rock type...
- the
glacial maximum of 12–15,000
years ago
hyaloclastite, then
pillow lavas under steep-sided
hyaloclastite occurred.: 4
These built up
until Herðubreið...
- and roll down the
volcano slopes,
pillow breccia, tuff breccia, and
hyaloclastite form. The mel****er may be
released from
below the ice as
happened in...
