Pyroclastic flow
. The expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption.
What are the gases from the erupting volcano called?
Ninety-nine percent of the gas molecules emitted during a volcanic eruption are water vapor (H2O),
carbon dioxide (CO2)
, and sulfur dioxide (SO2). The remaining one percent is comprised of small amounts of hydrogen sulfide, carbon monoxide, hydrogen chloride, hydrogen fluoride, and other minor gas species.
What is the expulsion of ash cinders bombs and gases during an explosive volcanic eruption?
The area covered by lava as it pours out of a volcano’s vent. … A slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe.
PYROCLASTIC FLOW
. The expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption.
What are volcanic cinders that erupt from a volcano?
A
cinder cone
is a steep conical hill of loose pyroclastic fragments, such as volcanic clinkers, volcanic ash, or cinder that has been built around a volcanic vent. The pyroclastic fragments are formed by explosive eruptions or lava fountains from a single, typically cylindrical, vent.
What is a volcanic mountain called when it’s made up of volcanic ash cinders and bombs?
Composite Volcano (Stratovolcano)
Some of the Earth’s grandest mountains are composite volcanoes—sometimes called stratovolcanoes. They are usually tall with steep even sides and are made out of repeating layers of lava flows, volcanic ash, cinders, blocks, and volcanic bombs.
How many craters does Taal volcano have?
The island consists of different overlapping cones and craters, of which
forty-seven
have been identified. Twenty six of these are tuff cones, five are cinder cones, and four are maars.
What is the most explosive type of volcano?
Because they form in a system of underground conduits,
stratovolcanoes
may blow out the sides of the cone as well as the summit crater. Stratovolcanoes are considered the most violent.
Where lava is found?
Most are located
around the Pacific Ocean
in what is commonly called the Ring of Fire. A volcano is defined as an opening in the Earth’s crust through which lava, ash, and gases erupt.
Can a volcano cause an avalanche?
A debris avalanche is the sudden catastrophic collapse (landslide) from an unstable side of a volcano.
Rising magma, earthquakes, weakening due to hydrothermal alteration and heavy rain
can trigger a debris avalanche of this unstable material. …
What is the name of mouth of volcano?
Crater
– Mouth of a volcano – surrounds a volcanic vent. Conduit – An underground passage magma travels through. Throat – Entrance of a volcano. The part of the conduit that ejects lava and volcanic ash.
What are the 3 types of volcano?
Individual volcanoes vary in the volcanic materials they produce, and this affects the size, shape, and structure of the volcano. There are three types of volcanoes:
cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes
.
What kind of lava is found in a shield volcano?
Most shield volcanoes are formed from fluid,
basaltic lava flows
.
Is Mount Vesuvius a shield volcano?
Italy’s Mt. Vesuvius is a
famous cinder cone volcano
. In contrast, shield volcanoes are characterized by a large, broad cone with sides sloping gently away from the center. The lava that erupts from these volcanoes is a thin liquid that slowly emerges from the center of the volcano as well as from cracks in its sides.
What is the most destructive volcano?
| Eruption Year Casualties | Mount St. Helens , Washington 1980 57 3 | Kilauea, Hawaii 1924 1 1 | Lassen Peak, California 1915 0 4 | Mount Vesuvius, Italy 79 A.D. 3,360 2 |
|---|
Which volcano is the least explosive?
Shield volcanoes
tend to be the least explosive volcanoes. Most of the material they produce is lava, rather than the more explosive pyroclastic material.
What shape is a shield volcano?
Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building
a broad, gently sloping cone of flat, domical shape
, with a profile much like that of a warrior’s shield.
