What are the names of 2 mantle hot spots that are on plate boundaries.

Mantle plumes are areas of hot, upwelling mantle. A hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. As oceanic volcanoes move away from the hot spot, they cool and subside, producing older islands, atolls, and seamounts. As continental volcanoes move away from the hot spot, they cool, subside, and become extinct.

most hotspots are located along the mid ocean ridges but are spread all over the world there is a main hotspot just of of north america and also off of madagascar.