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As the magma approches the surface, has gate trapped below, and pressure builds up. Once the pressure is to great to be contained, there is a violent eruption
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Is mount Krakatoa a shield volcano?
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
Does a composite volcano erupt quietly or explosively?
A composite volcano is the most explosive type of volcano there is. Mt. St. Helens and Mt.Vesuvious in Pompeii are both examples of composite volcanoes, and look at the damage they did. a composite volcano usually has pyroclastic flows to accompany the traditional lava and ash.
Why are the eruptions of stratovolcanoes usually more destructive than the eruptions of shield volcanoes?
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What kind of volcanoes form along subduction zones?
Usually composite volcanoes. subduction zone volcanos usually form steep sided composite cones composed primarily of andesite
What is the lava flow for a composite volcano?
Composite volcanoes are highly variable in how and what they erupt. In some cases composite volcanoes produce extremely viscous blocky lava flows of andesite or rhyolite. In other cases they may produce pahoehoe or a'a flows of basaltic lava. In many cases eruptions are explosive, producing clouds of ash and pyroclastic flows instead of lava flows.
What types of eruption does a shield volcano have?
Shield volcanoes usually produce effusive eruptions.
Is mount Krakatoa a shield volcano?
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
Does a composite volcano erupt quietly or explosively?
A composite volcano is the most explosive type of volcano there is. Mt. St. Helens and Mt.Vesuvious in Pompeii are both examples of composite volcanoes, and look at the damage they did. a composite volcano usually has pyroclastic flows to accompany the traditional lava and ash.
Why are the eruptions of stratovolcanoes usually more destructive than the eruptions of shield volcanoes?
JJahiauhkajsdasjdjkhiad
What kind of volcanoes form along subduction zones?
Usually composite volcanoes. subduction zone volcanos usually form steep sided composite cones composed primarily of andesite
What is the lava flow for a composite volcano?
Composite volcanoes are highly variable in how and what they erupt. In some cases composite volcanoes produce extremely viscous blocky lava flows of andesite or rhyolite. In other cases they may produce pahoehoe or a'a flows of basaltic lava. In many cases eruptions are explosive, producing clouds of ash and pyroclastic flows instead of lava flows.
Where are composite volcanoes usually found-?
in the north pole during the winter months.
The most violent volcanic activity is associated with?
The most violent volcanic explosions are usually generated from composite volcanoes and andesitic lava flows. These types of eruptions can throw lava and other debris several miles into the atmosphere.
What kind of you eruptions do composite volcanoes make?
Composite volcanoes can contain a wide variaty of magmas ranging from basaltic to rhyolitic.
What type of valcano is Mount Saint Helens?
Mt. Saint Helens is a composite volcano. Composite volcanoes are formed by some alternating layers of tephra (rock debris thrown into the air by volcanic eruptions) and lava. Composite volcanoes usually erupt violently and are large and steep-sided.
What kind of mafic lava do composite volcanoes have?
Composite volcanoes usually do not erupt mafic material. Intermediate material is the most common. The mafic material they do erupt is usually basalt.
What are the types of volcano?
There are four main types of volcanoes, namely Shield Volcanoes, Composite Volcanoes, Cinder Cones and Acid-lava Volcano. Shield Volcanoes: * Large base area * Gentle slope * Contains basic lava * Frequent eruptions * Quiet and gentle eruptions * Very tall in height due to large base area Composite Volcanoes: * Relatively small base area * Concave slope * Contains acidic lava * Violent eruptions * Repeated eruptions * Erupts from the side cones * Usually not very tall in height due to gentle slopes Acid-lava Volcanoes * Small base area * Steep slope * Contains acidic lava * Violent eruptions * Creates crater lakes (caldera) after eruptions * Tall in height due to steep slopes Cinder Cones * Small base area * Steep slopes * Symmetrical slopes * Moderate eruptions * Not tall in height as slopes are easily eroded
