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Rhyolitic magma. This type of magma is found where the gases can't escape like in volcanic eruptions. Because the gas can not escape, the magma becomes viscous, resulting in the explosions being violent and unpredictable. The other type of magma is Basaltic magma. This can be found where continent plates are pulling away from each other and the magma is nearer the surface. This allows the gas to escape and therefore the magma is less viscous and doesn't result in explosive volcanoes, here eruptions are gentle and 'rifts' are more likely, where lava is persistent. I hope this helps! :)
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What kind of magma produce violent eruptions?
The magma that can produce a violent eruptions is those rich in silica,fluid,iron, and forming shield volcano.
Do the most violent volcanoes spew mafic?
No. The most violent eruptions involve felsic magma.
What is common of most volcanoes that have the most violent eruptions?
They feature magma with very high silica content.
Why do composite volcanoes usually produce violent eruptions?
Composite volcanoes have steep sides due to their thick, viscous magma that traps gases inside, leading to pressure build-up and explosive eruptions. The magma's high silica content contributes to explosive eruptions by producing more viscous lava that easily clogs the vent, causing pressure to build until it violently erupts.
Cinder cone volcanoes produce quiet eruptions.?
No, they produce very explosive eruptions. They do not erupt much magma, instead exuding chunks of ash and semi-hardened igneous rock.
What causes the most violent eruptions in volcanoes?
The most violent eruptions in volcanoes are generally caused by extremely high gas pressures within the magma chamber. When the gas pressure becomes too high, it can lead to explosive eruptions that release large amounts of ash, gases, and volcanic material with high velocity and destructive power. The composition of the magma, particularly if it is rich in silica, also plays a role in determining the explosiveness of a volcanic eruption.
Do hotspot volcanoes tend to erupt more explosively than other volcanoes?
Hotspot volcanoes can exhibit a range of eruptive styles, but they often produce less explosive eruptions compared to other types of volcanoes, such as stratovolcanoes associated with subduction zones. This is primarily due to the basaltic magma typically found at hotspots, which is less viscous and allows gases to escape more easily, leading to effusive eruptions. However, some hotspot volcanoes can still produce explosive eruptions, especially if there are variations in magma composition or if the magma interacts with water. Overall, while many hotspot eruptions are relatively mild, exceptions do exist.
Why do compsite volcanos have violent explosions?
Composite volcanoes, also known as stratovolcanoes, have violent eruptions primarily due to their thick, viscous magma, which is rich in silica. This high viscosity traps gas bubbles within the magma, increasing pressure as magma rises towards the surface. When the pressure exceeds the strength of the surrounding rock, it results in explosive eruptions, propelling ash, gas, and volcanic rock into the atmosphere. Additionally, the steep, conical shape of composite volcanoes can further exacerbate the explosiveness of eruptions.
Are the Eyjafjallajokull eruptions violent or mild?
The eruptions would normally be passive in nature, however when the magma mixes with the glaciers present on the volcano it gets more explosive. The volcano is of the same style as Hawaiian volcanoes, however, with the presence of ice the eruptions tend to produce large amounts of steam and ash that can cause explosive outbursts.
Why are Hawaiians volcanic eruptions less violent?
Compared with some other volcanoes around the world, the Hawaiian volcanoes are fed by low-viscosity magma with a low gas content. The explosive power of a volcanic eruption is driven by gas trapped in the magma, and magma that is more viscous allows more pressure to build up. The magma in the Hawaiian volcanoes flows out fairly readily.
Why do composite volcanoes usaully produce violent eruptions?
They feature magma with very high viscosity
What type of magma is generally characterized as having low viscosity and is associated with non-violent or relatively quiet volcanic eruptions?
Basaltic magma is generally characterized as having low viscosity and is associated with non-violent or relatively quiet volcanic eruptions. Its low silica content allows it to flow easily, enabling lava to travel great distances. This type of magma is commonly found in shield volcanoes, where gentle eruptions lead to the formation of broad, gently sloping landforms. Examples include the eruptions of Hawaii's Mauna Loa and Kilauea volcanoes.
