1) What is a hotspot?
A volcanic 'hotspot' is an area in the upper mantle from which heat rises in a plume from deep in the Earth. High heat and lower pressure at the base of the mantle facilitates melting of the rock. This melt, called magma, rises through cracks to the surface and forms volcanoes. As the tectonic plate moves over the stationary hot spot, the volcanoes are rafted away and new ones form in their place. This results in chains of volcanoes, such as the Hawaiian Islands.
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Dear dcn33,(previous reviewer)<br /> I see you have reviewed at lease 50 videos, thus may be a good critic of what is available. <br /> I am interested to know why you assigned two stars to this video made for the general public. It has been reviewed for scientific accuracy. It has also been reviewed very favorably on YouTube where it has had over 152,000 views. <br /> When you assign stars, you owe it to viewers to give a sentence about why you make that call.<br /> Arbitrary low numbers serve as an aversion to new viewers who are unaware of any credentials you may have.<br />
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