hot spot

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An area of high volcanic activity. Some hot spots, e.g. Iceland, are located on constructive margins. Others occur within lithospheric plates, often lying at the end of a chain of progressively older volcanoes, e.g. the Hawaiian-Emperor Chain. The hot spot is thought to be stationary, or nearly so, and to produce volcanoes intermittently as the plate moves over it. It has been suggested that mantle plumes lie beneath hot spots.

Subjects: Earth Sciences and Geography.

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