GEOLOGY

Detailed explanation-1: -Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future.

Detailed explanation-2: -Extinct → Extinct volcanoes are those which have not erupted in human history. Examples of extinct volcanoes are Mount Thielsen in Oregon in the US and Mount Slemish in Co.

Detailed explanation-3: -Inactive volcanoes that have not erupted for an amount of time but can’t be called extinct are dormant volcanoes. They can be called “sleeping” volcanoes. ( see Thinkquest for more) Inactive volcanoes which have not erupted since the beginning of recorded history are extinct volcanoes.

Detailed explanation-4: -Extinct volcanoes are the ones which have not been active from tens of thousands of years. So they are considered dead and are not expected to erupt in future whereas dormant volcanoes are the ones which have not erupted from a long time but are expected to erupt in the future.

Detailed explanation-5: -Extinct volcanoes haven’t erupted for tens of thousands of years, and aren’t expected to erupt again. What causes volcanoes to go extinct? Simply put, they’re cut off from their supply of lava.