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because the volcano's vent gets plugged, gases cannot escape and pressure build up.
What else can I help you with?
What is a volcanic dome?
I don't know about viscous, but a lava dome is a steep-sided dome of thick lava extruding from a volcanic vent.a viscous lava dome is when the lava from the volcano contains alot of silica. Viscous=sticky. So the lava cools quickly of the sides of the volcano. And often a viscous lava dome volcano is explosive.
Which of these is a tall and narrow volcanic mountain formed around a vent with steep sides?
The correct term is a volcanic plug, which is a tall and narrow volcanic mountain formed around a vent with steep sides. They are often the solidified remnants of volcanic pipes that once transported magma from deep within the Earth to the surface.
How does magma composition and the resulting eruption affect the form of a volcano?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
What magma that reaches the surface may form what kind of mountain?
Magma that reaches the surface can form volcanic mountains. When magma erupts through the Earth's crust, it can create structures such as shield volcanoes, which have broad, gently sloping sides, or stratovolcanoes, which are steep and conical in shape. The type of volcanic mountain formed depends on the viscosity of the magma and the nature of the volcanic activity. Over time, repeated eruptions can build up these mountains significantly.
What type of material makes up volcanoes with broad sloping sides?
Basalt lava forms shield volcanoes which are known for their broadly sloped flanks. This is because there is a low amount of Silica in the volcanic material allowing the magma to flow very freely giving the broad flanks as lava flows out.
What is a volcanic dome?
I don't know about viscous, but a lava dome is a steep-sided dome of thick lava extruding from a volcanic vent.a viscous lava dome is when the lava from the volcano contains alot of silica. Viscous=sticky. So the lava cools quickly of the sides of the volcano. And often a viscous lava dome volcano is explosive.
Which of these is a tall and narrow volcanic mountain formed around a vent with steep sides?
The correct term is a volcanic plug, which is a tall and narrow volcanic mountain formed around a vent with steep sides. They are often the solidified remnants of volcanic pipes that once transported magma from deep within the Earth to the surface.
How does magma composition and the resulting eruption affect the form of a volcano?
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
What magma that reaches the surface may form what kind of mountain?
Magma that reaches the surface can form volcanic mountains. When magma erupts through the Earth's crust, it can create structures such as shield volcanoes, which have broad, gently sloping sides, or stratovolcanoes, which are steep and conical in shape. The type of volcanic mountain formed depends on the viscosity of the magma and the nature of the volcanic activity. Over time, repeated eruptions can build up these mountains significantly.
What type of material makes up volcanoes with broad sloping sides?
Basalt lava forms shield volcanoes which are known for their broadly sloped flanks. This is because there is a low amount of Silica in the volcanic material allowing the magma to flow very freely giving the broad flanks as lava flows out.
Why is the silica content of lava important?
The more silica crystal within the magma, the more viscous the magma is, because of crystals sticking together. So magma with low silica content is runny, and wiht just flow gently out of a volcano, like in hawai, but viscous (sticky, like honey) magma will not, and gas gets trapped within it, and then explodes out, cause large scale explosive erruptions.
Do all volcanic eruptions pass through the crater at the volcanic summit?
No, not all volcanic eruptions pass through the crater at the volcanic summit. Some eruptions can occur from fissures on the sides of the volcano or even from vents located lower down on the volcano's slopes.
What is the cause of volcanic eruption?
Magma in mantal is under great heat and high temperature. Once there is a crack or we called a line of weakness appears on crust's surface,magma would escae to the surface from mantal.Volcanic ashes,gases and magma would throw out and causes volcanic eruptions.
Classify the volcano my.fuji which has steep sides and is made of layers of silica-rich lava and ash?
Mount Fuji is classified as a stratovolcano, also known as a composite volcano. This type of volcano is characterized by its steep sides and is formed from alternating layers of viscous, silica-rich lava and volcanic ash. The combination of explosive eruptions and lava flows contributes to its conical shape and layered structure.
What is a complex volcano?
A complex volcano is a type of volcano that is composed of multiple vents and has a system of interconnected magma chambers. These volcanoes are characterized by their large size, steep sides, and a variety of volcanic features, such as calderas, craters, and lava domes. A famous example of a complex volcano is Mount St. Helens in the United States.
What are magma flow across layers of volcanic cone?
Magma typically rises from the mantle through fractures or conduits in the Earth's crust to reach the surface of a volcanic cone. As the magma ascends, it can pool in magma chambers within different layers of the cone, creating distinct layers of lava flows. The composition, viscosity, and gas content of the magma can influence how it flows across these layers, leading to varied eruption styles and resulting in different types of lava flows.
How does gas affect a volcano eruption?
Volcanoes vary a lot in how they erupt. The most important factor is the gas content of the magma. All magmas have gases dissolved in them, in the same way that soft drinks have carbon dioxide dissolved in to make them fizzy. As the magma gets close to the surface, the pressure on the magma decreases. That causes some of the gas to bubble out of the magma. Magma with low gas content comes out of the volcano without violent explosions and then flows peacefully down the sides of the volcano.
