What material makes up a shield cone?

Shield volcanoes are composed almost entirely of relatively thin lava flows built up over a central vent. Most shields were formed by low viscosity basaltic magma that flows easily down slope away form the summit vent.

1. What type of material comes out of a shield volcano?
2. How is a shield cone formed?
3. What is Shield cone?
4. What is a composite cone?
5. How do composite shield and cinder cone volcanoes differ?
6. What materials make up composite volcanoes?
7. What does a cinder cone volcano look like?
8. What are the contributing factors that affect the formation of shield cone?
9. What makes a cinder cone volcano erupt?
10. What does lahar mean?

What type of material comes out of a shield volcano?

Shield volcanoes are almost exclusively basalt, a type of lava that is very fluid when erupted.

How is a shield cone formed?

Shield cones form from hot, runny lava that is erupted from the the volcano through its summit and the many side vents and fissures throughout the volcano's flanks (Sides). Shield cones are low, very broad, and gently sloping volcanoes.

What is Shield cone?

[shēld ‚kōn] (geology) A cone or dome-shaped volcano built up by successive outpourings of lava.

What is a composite cone?

Composite cones. Composite cones are some of the most easily recognizable and imposing volcanic mountains, with sloping peaks rising several thousand meters above the landscape. Also known as stratocones, composite cones are made up of layers of lava, volcanic ash, and fragmented rocks.

How do composite shield and cinder cone volcanoes differ?

Composite volcanoes are tall, steep cones that produce explosive eruptions. Shield volcanoes form very large, gently sloped mounds from effusive eruptions. Cinder cones are the smallest volcanoes and result from accumulation of many small fragments of ejected material.

What materials make up composite volcanoes?

Composite volcanoes—also called stratovolcanoes—are named for their composition. These volcanoes are built from layers, or strata, of pyroclastic material, including lava, pumice, volcanic ash, and tephra. The layers stack on each other with each eruption.

What does a cinder cone volcano look like?

As the name "cinder cone" suggests, they are cone-shaped hills made up of ejected igneous rocks known as "cinders". These small volcanoes usually have a circular footprint, and their flanks usually slope at an angle of about 30 to 40 degrees. Most cinder cones have a bowl-shaped crater at the top.

What are the contributing factors that affect the formation of shield cone?

It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano. Repeated eruptions result in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form.

What makes a cinder cone volcano erupt?

Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. ... Explosive eruptions caused by gas rapidly expanding and escaping from molten lava formed cinders that fell back around the vent, building up the cone to a height of 1,200 feet.

What does lahar mean?

Definition: A lahar is a hot or cold mixture of water and rock fragments that flow quickly down the slopes of a volcano. ... Lahars can be extremely destructive and are more deadly than lava flows.