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What are ash deposits from a volcano?
When a volcano erupts explosively, some of the molten rock is ejected in the form of small particles. These cool to form tiny pieces of volcanic glass. Clouds of volcanic ash either race down the sides of a volcano in avalanches called pyroclastic flows, or fall to earth like snow from tall eruption plumes. In either form volcanic ash can be dangerous. Pyroclastic flows are extremely hot, burning almost everithing in their paths. Falling ash has had time to cool, but still prsents hazards. It is very dense and can cause roofs to collapse. It clogs engines and interferes with electical equipment. It can damage the lungs if inhaled. Volcanic ash can also mix with water from rain or melting glaciers to form deadly mudflows called lahars.
What is a cloud of ash from a volcano?
When a volcano erupts explosively some of the molten rock may come out in a sort of spray. This cools to form tiny particles of glass called volcanic ash. This ash can be carried into the air by hot volcanic gas, forming billowing or swirling clouds.
Why do volcanoes in the Philippines releases lahar while in the other countries it releases magma?
Magma comes out of all volcanoes, though it is called lava once it reaches the surface. In an explosive volcanic eruption, however, the magma does not become lava, but instead forms tiny particles of glass called volcanic ash. This ash can then mix with water to form muflows called lahars. Lahars are not limited to the Philippines, but can occur anywhere that there are sufficient amounts of ash and water.
What causes the ash and water to mix and form a type of mud that sets like concreate when it stops floing when a lahar occurs?
There are two ways can happen. It can happen during an eruption as the heat melts overlying snow and ice, which then mixex with the ash. It can also occur in the absense of an ongoing eruption if heavy rain falls on an ash deposit.
What is the difference between pyroclasts and tephra?
Tephra flow is fragments of volcanic rock and lava. Pyroclastic flow is fast moving current of hot gas and rock.
What happens when a storm meets a volcano?
Rainwater will wash down the sides of the volcano. Heavy rain can sometimes mix with volcanic ash to form a dangerous mudflow called a lahar. If the volcano is erupting, rain that comes in contact with lava or hot pyroclastic material will turn to steam.
What are ash deposits from a volcano?
When a volcano erupts explosively, some of the molten rock is ejected in the form of small particles. These cool to form tiny pieces of volcanic glass. Clouds of volcanic ash either race down the sides of a volcano in avalanches called pyroclastic flows, or fall to earth like snow from tall eruption plumes. In either form volcanic ash can be dangerous. Pyroclastic flows are extremely hot, burning almost everithing in their paths. Falling ash has had time to cool, but still prsents hazards. It is very dense and can cause roofs to collapse. It clogs engines and interferes with electical equipment. It can damage the lungs if inhaled. Volcanic ash can also mix with water from rain or melting glaciers to form deadly mudflows called lahars.
Volcanic ash from an eruption is hazardoes because?
could mix with snow and water to cause mudslides
What happens when volcanic ash and water mix?
If relatively small amounts of water mix with ash it makes the ash heavier, which can cause roofs to collapse. Larger amounts of water can turn the ash int mud and cause dangerous mudflows called lahars.
What is a cloud of ash from a volcano?
When a volcano erupts explosively some of the molten rock may come out in a sort of spray. This cools to form tiny particles of glass called volcanic ash. This ash can be carried into the air by hot volcanic gas, forming billowing or swirling clouds.
Why do volcanoes in the Philippines releases lahar while in the other countries it releases magma?
Magma comes out of all volcanoes, though it is called lava once it reaches the surface. In an explosive volcanic eruption, however, the magma does not become lava, but instead forms tiny particles of glass called volcanic ash. This ash can then mix with water to form muflows called lahars. Lahars are not limited to the Philippines, but can occur anywhere that there are sufficient amounts of ash and water.
What causes the ash and water to mix and form a type of mud that sets like concreate when it stops floing when a lahar occurs?
There are two ways can happen. It can happen during an eruption as the heat melts overlying snow and ice, which then mixex with the ash. It can also occur in the absense of an ongoing eruption if heavy rain falls on an ash deposit.
What is the difference between pyroclasts and tephra?
Tephra flow is fragments of volcanic rock and lava. Pyroclastic flow is fast moving current of hot gas and rock.
What is another name for a volcanic mudflow?
The name of a volcanic mudslide would be a lahar.
Some volcanoes have glaciers on top which may melt causing what type of hazard?
The glaciers may melt and mix with volcanic ash, forming mudflows called lahars.
When sulfur and nitrogen oxide mix with water in the air they form?
Acid Rain
Is volcanic ash dangerous?
Volcanic ash is extremely abrasive, so that if an aeroplane flies into an ash cloud, the ash will abrade the windows of the cockpit and make them impossible to see through. It can also be melted by high heat and the solidifies to form glass, which is a major problem for aeroplane engines. If mixed with water it forms a type of mud (a mudflow of this sort is known as a lahar), which solidifies as hard as concrete. It it also heavy, so that if it builds up on the roofs of buildings, it can make them collapse. If it is inhaled, it can mix with the fluid in the lungs and cause asphyxiation.
