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If a volcano is not active for thousand of years, it is considered to be extinct.
Sometimes it happens that an extinct volcano also errupts for sometimes due to some internal behaviour of magma inside the earth's crust in the core.
But generally it does not happen. If a volcano has neither been errupted for thousands of years not it has evoked any gases , it is considered to be extinct.
The concept of volcano is very interesting, adventerous and sometimes very dangerous. The molten rocks at very high temperature(known as magma) travel inside the earth's crust with very high velocity. The find places to come out from the crust to the surface of the earth. Wherever they find weak surfaces the just break up the surface and come out with erruption causing smoke and gases of hundreds of miles above the earth's surface.
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What is a extinct volcano?
The volcanoes which used to be active in the past and have not shown any signs of blowing up in many years are extinct volcanoes.
How long is it before a volcano is extinct?
An extinct volcano must have not erupted in historical times (when history was first recorded). It takes many many years to distinguish an extinct volcano from a dormant one, and it is very difficult too. An example would be the Fourpeaked Mountain in Alaska, which prior to September 2006, is not believed to have erupted since earlier than 7994 BC! Mostly, it takes about 5,000 to 6,000 years for a dormant volcano to be considered extinct, except in rare cases. Another would be the hotspot theory. Whenever a volcano island moves away from the hotspot, the magma source is cut off, and the volcano is considered extinct. An example would the Hawaii Chain Islands.
Is there a extinct volcano under bunbury senior high school?
yes bunbury senior high school is built on a volcano but it is not active and erupted last many many many years ago
Is Mount Warning the worlds largest extinct volcano?
No there are many other extinct volcanoes that are larger.
Is the Sugarloaf in Ireland a volcano?
No. But there is a volcano in Ireland and it erupted last year! That volcano was in Iceland. Regarding the sugarloaf, there are a number of sugarloaf mountains in Ireland. Only 1 is a volcano which is extinct. Ireland has many volcanos all of which are extinct.
When did the mammoths become extinct?
Because of the ice age melting it caused the wolly mammiths to become extinct and many other animals.
What is an extinct volcano called?
An extinct volcano is one that scientists believe will not erupt again. That is because the volcano no longer has a magma supply. There are many volcanoes that are considered extinct on the Hawaiian islands. Exactly when a volcano has become extinct can be difficult, if not impossible, for scientists to determine.
How many years ago did the Eurasian crane become extinct?
The Eurasian Crane is not extinct. There are around 300,000 of them in the wild. Their population is declining, but not worrying yet.
What is the name of an extinct Hawiian volcano?
There are many to choose from but Diamond Head is a favorite.
What is the only volcano in Europe?
There are many extinct, dormant and active volcanoes in Europe.
What year did the toxodon become extinct?
Like many ice age species, it became extinct at the end of the Pleistocene Epoch 16,500 years ago.
When a volcano has not erupted for thousands of years what is it called?
You call a volcano that is no longer active (erupting, or any other seismic activity) dormant.
