- Volcanism, vulcanism,
volcanicity, or
volcanic activity is the
phenomenon where solids, liquids, gases, and
their mixtures erupt to the
surface of a solid-surface...
- rift-related
volcanicity (e.g. the
peralkaline rhyolites of the East
African Rift in
central Kenya) as well as
continental and
oceanic hotspot volcanicity (e.g...
-
crust of a planetary-m**** object, such as Earth, that
allows hot lava,
volcanic ash, and
gases to
escape from a
magma chamber below the surface. On Earth...
- A
volcanic eruption occurs when
material is
expelled from a
volcanic vent or fissure.
Several types of
volcanic eruptions have been
distinguished by volcanologists...
-
Volcanic rocks (often
shortened to
volcanics in
scientific contexts) are
rocks formed from lava
erupted from a volcano. Like all rock types, the concept...
- with no
volcanicity immediately beyond it. The
Volcanic Eifel is
divided into
three natural regions:
Volcanic West
Eifel (West
Eifel Volcanic Field):...
-
Volcanic ash
consists of
fragments of rock,
mineral crystals, and
volcanic gl****,
produced during volcanic eruptions and
measuring less than 2 mm (0.079 inches)...
-
periods of
volcanicity.
Magmatic lulls can be
related to
volcanic gaps,
which are
regions lacking volcanic activity that
separate two
distinct volcanic zones...
- The
volcanic explosivity index (VEI) is a
scale used to
measure the size of
explosive volcanic eruptions. It was
devised by
Christopher G.
Newhall of the...
- lava, from
volcanic craters or vents.
Volcanic gases can also be
emitted through groundwater heated by
volcanic action. The
sources of
volcanic gases on...
