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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...
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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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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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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...
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geological data. The cave
itself is
around 7m deep and made of soft
hyaloclastite,
which is why the
figures could be
carved by ab****n and then polished...
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containing well-preserved mafic-intermediate
pillow lavas,
pillow breccias,
hyaloclastite and peperites,
submarine lava
domes and dome-****ociated
breccia deposits...
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pebbles of
obsidian Helenite –
Artificial gl**** made from
volcanic ash
Hyaloclastite –
Volcaniclastic ac****ulation or
breccia and
tachylite –
volcanic gl****es...
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often occurs as
fragments embedded in a
palagonite matrix,
forming hyaloclastite deposits.
Sideromelane is a
mafic rock. Hay, R. L.; Iijima, A. (1968)...
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subglacial volcanism. It can
contain pillow lava,
pillow breccia, hyalotuff,
hyaloclastite.
Examples are Skefilfjall, Kálfstindar,
Helgafell in
Iceland and Pillow...
