What is a volcanic hotspot?

What is a volcanic hotspot?
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In geological terms, volcanic hotspots are volcanic regions below which volcanism occurs because of a rising mantle that is hotter than the surrounding mantle. The rising mantle is as a result of lava activity from underneath and may even erupt from time to time. The position of tectonic plate boundaries in volcanic hotspots does not in any way affect the hot mantles. In many cases, hotspots remain constant while tectonic plates move further away thus leaving a trail of volcanoes, the oldest being the furthest away from its original location. There are different suggestions as to the origin and composition of volcanic hotspots. The majority of volcanic hotspots consist of extrusive igneous rock (basalt) that have formed over the years due to rapid cooling lava that is exposed at the Earthâ
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