GEOLOGY

Detailed explanation-1: -A dormant volcano is one that is “sleeping” but could awaken in the future, such as Mount Rainier and Mount Fuji. An extinct volcano is “dead”-it hasn’t erupted in the past 10, 000 years and is not expected to ever erupt again. Kohala on the Big Island of Hawaii could be considered an extinct volcano.

Detailed explanation-2: -Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. 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-3: -However, shield volcanoes rarely erupt violently; lava simply flows forth. Thus, shield volcanoes can be said to be the least violent type of volcanoes.

Detailed explanation-4: -ago. Mount Thielsen (2, 799 m or 9, 182 ft) is an extinct volcano north of Crater Lake, Oregon that last erupted about 300, 000 years ago.