what is a complex volcano

What do you mean by complex volcano?

A complex volcano, also called a compound volcano, is defined as one that consists of a complex of two or more vents, or a volcano that has an associated volcanic dome, either in its crater or on its flanks.

What is a complex volcano for kids?

Composite volcanoes (stratovolcanoes) are steep-sided volcanoes that can be found around the world, including the Ring of Fire, which is a half circle of volcanoes that have formed a border around the upper part of the Pacific Ocean. The steep sides of these tall volcanoes are formed by layers of lava, ash, and rock.

Where are complex volcanoes found?

These volcanoes are commonly experience in USA especially Mt. St . Helens and Mt.Shasta, Italy, Philippines, Japan Ecuador, and Canada.

What is a complex stratovolcano?

Complex volcanoes

A stratovolcano may form a large explosion crater that later becomes filled by a lava dome, or several new cones and craters may develop on a caldera’s rim. One stratovolcano may have multiple summits when individual cones overlap one another.

What is a complex volcano discuss the salient features?

A complex volcano, also called a compound volcano, is defined as one that consists of a complex of two or more vents, or a volcano that has an associated volcanic dome, either in its crater or on its flanks. Examples include Vesuvius, besides Taal.

Why are lava domes viscous?

This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite.

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What are 2 facts about composite volcanoes?

Composite volcanoes, also called stratovolcanoes, are cone-shaped volcanoes built from many layers of lava, pumice, ash, and tephra. Because they are built of layers of viscous material, rather than fluid lava, composite volcanoes tend to form tall peaks rather than rounded cones.

Why is Mount St Helens a composite volcano?

Mount St. Helens is an example of a composite or stratovolcano. These are explosive volcanoes that are generally steep-sided, symmetrical cones built up by the accumulation of debris from previous eruptions and consist of alternating layers of lava flows, volcanic ash and cinder.

What is a composite volcano ks3?

Composite volcanoes are steep-sided and cone-shaped, made up of layers of ash and lava and containing sticky lava which doesn’t flow very far. Mount Etna in Italy is a composite volcano. Shield volcanoes have gently sloping sides and runny lava that covers a wide area. Gases escape very easily from shield volcanoes.

Is Yellowstone a composite volcano?

Examples of composite volcanoes include Mount St. … One of the most powerful volcanoes in the world—Yellowstone—is a massive caldera that has collapsed several times. Sometimes these calderas can fill up with water to produce beautiful lakes such as Mount Mazama (Crater Lake), in Oregon.

What type of volcano is the most explosive?

Stratovolcanoes are considered the most violent. Mount St. Helens, in Washington state, is a stratovolcano that erupted on May 18, 1980.

What type of magma erupts out of dome complexes?

Felsic magma is the answer.

Why is Taal volcano a complex volcano?

It’s a ‘complex’ volcano

Taal is defined as a “complex volcano” – it doesn’t have just one main vent or cone but several eruption points that have changed over time.

What type of lava erupts from stratovolcanoes?

Usually constructed over a period of tens to hundreds of thousands of years, stratovolcanoes may erupt a variety of magma types, including basalt, andesite, dacite, and rhyolite. All but basalt commonly generate highly explosive eruptions.

What type volcano is Mt Fuji?

stratovolcano

Mount Fuji is a composite cone, or stratovolcano. Composite cones, formed by violent eruptions, have layers of rock, ash, and lava. Mount Fuji is a symbol of Japan. The mountain contributes to Japan’s physical, cultural, and spiritual geography.Dec 6, 2011

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How are the compound volcano formed?

A composite volcano is formed over hundreds of thousands of years through multiple eruptions. The eruptions build up the composite volcano, layer upon layer until it towers thousands of meters tall. Some layers might be formed from lava, while others might be ash, rock and pyroclastic flows.

What are a group of volcanoes called?

A volcanic group is a stratigraphic group consisting of volcanic strata. They can be in the form of volcanic fields, volcanic complexes and cone clusters.

Is Lassen Peak a complex volcano?

Lassen Peak remains an active volcano, as volcanic activity including fumaroles (steam vents), hot springs, and mudpots can be found throughout Lassen Volcanic National Park.

Can shield volcanoes erupt?

Eruptions at shield volcanoes are only explosive if water somehow gets into the vent, otherwise they are characterized by low-explosivity fountaining that forms cinder cones and spatter cones at the vent, however, 90% of the volcano is lava rather than pyroclastic material.

How do Supervolcanoes erupt?

Supervolcanoes occur when magma in the mantle rises into the crust but is unable to break through it and pressure builds in a large and growing magma pool until the crust is unable to contain the pressure. This can occur at hotspots (for example, Yellowstone Caldera) or at subduction zones (for example, Toba).

What type of lava does Santa Maria have?

Santa Maria is a stratovolcano made of basaltic andesite. The 1902 eruption of Santa Maria lasted 19 days and produced 1.3 cubic miles (5.5 cubic km) of dacite pyroclastic debris.

How many vents does a composite volcano have?

The eruptions that form these volcanoes lay down alternating layers of lava, ash, cinders and pyroclastic material. While this type of volcano might have only one vent, it also might be a composite of several vents.

What happens when a composite volcano erupts?

Composite volcanoes have very sticky and thick lava, which can make them very explosive when they erupt: gas bubbles that are trapped in the magma chamber find it hard to escape through the viscous rock. They can also spurt lots of hot ash and rocks into the air, making them extremely dangerous.

What kind of volcanoes will never erupt again?

Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future.

What kind of volcano is Yellowstone?

supervolcano

Yellowstone National Park is situated over a supervolcano that is capable of an eruption of magnitude 8. It has had three massive eruptions, all of which created calderas.

Is Mt Vesuvius a composite volcano?

Mount Vesuvius is considered to be one of the most dangerous volcanoes in the world because of its proximity to the city of Naples and the surrounding towns on the nearby slopes. The volcano is classed as a complex stratovolcano because its eruptions typically involve explosive eruptions as well as pyroclastic flows.

What would happen if Yellowstone exploded?

If the supervolcano underneath Yellowstone National Park ever had another massive eruption, it could spew ash for thousands of miles across the United States, damaging buildings, smothering crops, and shutting down power plants. … In fact, it’s even possible that Yellowstone might never have an eruption that large again.

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What are the 3 types of volcano?

There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes.

What is the difference between composite and shield volcanoes?

Composite volcanoes are tall, steep cones that produce explosive eruptions. Shield volcanoes form very large, gently sloped mounds from effusive eruptions.

What’s the difference between shield volcanoes and composite?

Composite volcanoes have a low magma supply rate, resulting in infrequent eruptions. Shield volcanoes feature basaltic lava. This type of lava is hot, fluid and low in gas content. Shield volcanoes are characterized by a high magma supply rate, lending itself to frequent eruptions.

Was Mt Everest a volcano?

Mount Everest is not an active volcano. It is not a volcano but a folded mountain formed at the point of contact between the Indian and Eurasian…

What happens if Mt Hood erupted?

A significant eruption of Mount Hood, such as an eruption of lava domes that collapse to form pyroclastic flows and lahars, would displace several thousand residents and cause billion-dollar-scale damage to infrastructure and buildings.

Will Mount Shasta erupt again?

USGS scientists are currently working on this question. Mount Shasta doesn’t erupt on a regular timescale. Research indicates that the volcano erupts episodically with ten or more eruptions occurring in short (500-2,000 year) time periods separated by long intervals (3,000-5,000 years) with few or no eruptions.

What happens if you jump in lava?

The extreme heat would probably burn your lungs and cause your organs to fail. “The water in the body would probably boil to steam, all while the lava is melting the body from the outside in,” Damby says. (No worries, though, the volcanic gases would probably knock you unconscious.)

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Volcano types: Cinder cone, composite, shield and lava domes explained – TomoNews

Volcanoes 101 | National Geographic

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