- rock than as lava flows.
Rhyolitic ash-flow
tuffs are
among the most
voluminous of
continental igneous rock formations.
Rhyolitic tuff has been used extensively...
- a nodule-like rock,
similar to a
filled geode, that is
formed within rhyolitic volcanic ash layers.
Thundereggs are
rough spheres, most
about the size...
- over 110
different eruptions and has
created mostly rhyolitic plains, with over 6000 km3 of
rhyolitic material formed.
Scientists have
discovered three...
- aluminium, sodium, and pot****ium. It is
commonly found within the
margins of
rhyolitic lava
flows known as
obsidian flows.
These flows have a high
content of...
-
composed of
black or dark-colored
natural volcanic gl****,
usually of
rhyolitic composition and
bearing conchoidal fracture. Also
known by the lithologic...
- of
primary intracaldera material,
equivalent to 530 km3 (130 cu mi) of
rhyolitic magma,
totalling 1,170 km3 (280 cu mi) of
total deposits. As such it is...
- domes,
crater lakes, and
numerous bimodal lavas and
tuffs of
basaltic and
rhyolitic composition,
originally covering about 17,000 km2 (6,600 sq mi). Volcanism...
-
Bishop Tuff is a
welded tuff
which formed 764,800 ± 600
years ago as a
rhyolitic pyroclastic flow
during the
approximately six-day
eruption that formed...
-
range in
diameter from 0.30 to 4.3
meters occur within a
thick layer of
rhyolitic vitrophyre.
Megaspherulites as
large as 0.91
meter occur within rhyolite...
-
relative abundance of
volatiles varies within basaltic, andesitic, and
rhyolitic magma chambers,
leading to some
volcanoes being exceedingly more explosive...
