VOLCANIC MOUNTAINS

Volcanoes :A volcano is a vent or narrow opening in the earths crust connected by a conduit to an underlying magma chamber through which magma, rocks fragments , lava, ash,smoke and more .................... the temperature increases at an average rate of 1 degree C .

On the Basis of Freqency and Intensity of Eruptions
Volcanoes are classified into 3 major types

Active Volcanoes : Active Volcanoes are those which erupted lava,gases,ashes,cinder,pumice,etc. in the recent hestoric times . there are about 500 active volcanoes !!!!!!!!!

There are some examples like mt Stromboli .......

St. Helen Mt Etna

Dormant Volcanoes :

Dormant Volcanoes are those which have Erupted in the past and are likely to erupt again after remain inactive for a fairly long periods . They are also known as "Sleeping Volcanoes" .
Mt.Vesuvius

Volcano Hawaii

Extinct Volcanoes :

Extinct Volcanoes are thoses which were active in the remote geological periods . These are not likely to be active once again. Crater Ngorongoro

The famous crater Gorongoro in Tanzania is an extinct volcano .