Question

information about volcano eraption with their cause nd effects plz ans fast.....​

Answer 1

Answer:

Volcanoes are formed by eruptions of lava and ash when magma rises through cracks or weak-spots in theEarth's crust. A build up of pressure inthe earth is released, by things such as a plate movement which forces molten rock to exploded into the aircausing a volcanic eruption.

Answer 2

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AnSwEr:

Volcanoes are formed by eruptions of lava and ash when magma rises through cracks or weak-spots in the Earth's crust. A build up of pressure in the earth is released, by things such as a plate movement which forces molten rock to exploded into the air causing a volcanic eruption.

There are several different causes for a volcano to erupt which all fundamentally come down to a pressure change within the volcano which forces the magma to overflow the chamber it is held in.

Decreasing temperatures can cause old magma to crystallise and sink to the bottom of the chamber and this movement can force fresh liquid magma up and out - similar to dropping a brick in a bucket of water.

Finally a decrease in external pressure can trigger an eruption as it may minimise the volcano's ability to hold back by increasing the pressures inside the magma chamber.

This kind of eruption can be caused by natural events such as typhoons, which decrease rock density, and glacial melting on the top of the volcano which alters the molten rock composition.

A build up of pressure in the earth is released, by things such as a plate movement which forces molten rock to exploded into the air causing a volcanic eruption.

The lava from the eruption then cools to form a new crust.

Over time, generally several eruptions, the rock builds up and forms a volcano.

Shield volcano These volcanoes have a flat dome-like appearance and release lava in a gentle manner that is generally slow and easy for humans and animals to out run. They produce Basaltic lava, which is the most common type found on earth. Shield volcanoes tend to erupt frequently but are relatively gentle eruptions. Kilauea volcano in Hawaii is a shield volcano. They tend to erupt more frequently and on a smaller scale than other volcanoes.

Stratovolcano This type has the classic cone shape associated with volcanoes. These volcanoes produce large violent eruptions which often lead to mud-slides and produce fast moving clouds of hot gas and volcanic matter called pyroclastic flow.

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