If the earth's core is so hot and the magma is so hot in the volcanoes close to the surface then why isn't the Marianus Trench warm or hot at the bottom?
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Thank you very much for that information. The question arose in my mind after I watched the New Evidence of Mermaids and such. They said that the water was colder and darker but being so close to the center I thought it would be warmer instead.
The water is darker and under greater pressure. And, in the general depths, being further from the sun, also colder. But right near the earth warmed by magma, and at undersea vents, it is hotter.