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Hotspot volcanoes and mantle plumes
A hotspot is an area where a hot thermal plume melts the base of the Lithosphere due to high heat and low pressure
Magma rises through cracks and forms volcanoes
Hotspots do not move as the plates move the magma continues to erupt and cool to farm island chains such as Hawaiian islands
Hotspots added further Proof to tectonic theory
The least dangerous type of volcano
Fissure volcano - Icelandic
The most dangerous type of volcano
A dome volcano
E.g. Yellowstone, USA
Types of eruption
Icelandic is effusive and gentle
Vulcanian Has a high plume
Strombolian is explosive
Plinian The worst type of eruption Very tall plume, massive area of extent