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Most hotspot volcanoes are basaltic (e.g., Hawaii, Tahiti). As a result, they are less explosive than subduction zone volcanoes, in which water is trapped under the overriding plate. Where hotspots occur in continental regions, basaltic magma rises through the continental crust, which melts to form rhyolites.n geology, the places known as hotspots or hot spots are volcanic regions thought to be fed by underlying mantle that is anomalously hot compared with the surrounding mantle. They may be on, near to, or far from tectonic plate boundaries. Currently, there are two hypotheses that attempt to explain their origins.
Volcanoes usually occur along the boundaries of tectonic plates but they can also occur far from any boundary, over a 'hot spot'. The Hawaiian Islands are a string of volcanoe â¦ s that formed as the Pacific Plate slowly moved over a hot spot. The hot spot is still active and the plate is still moving.olcanoes typically are found at convergent boundaries and  divergent boundaries, like the Ring of Fire around the Pacific  Plate. Hot spots around the world account for the â¦ third place where  volcanoes can occur. 1 person found this useful.