- 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)...
- the
wildlife of the area.
Within the
national park are the
Museum of
Volcanicity and a
ranger station. The park lies
within the
Arenal Huetar Norte Conservation...
- 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...
- Tuff is a type of rock made of
volcanic ash
ejected from a vent
during a
volcanic eruption.
Following ejection and deposition, the ash is
lithified into...
