Does a magnetic mountain, with a circumference of 33 French miles, that extends all the way to the clouds, still persist at the North Pole in the present day?

Mercator described the island (Hyperborea) in a letter dated 1577, addressed to John Dee, an English mathematician, astronomer and astrologer:

"...In the midst of the four countries is a Whirl-pool, into which there empty these four indrawing Seas which divide the North. And the water rushes round and descends into the Earth just as if one were pouring it through a filter funnel. It is four degrees wide on every side of the Pole, that is to say eight degrees altogether. Except that right under the Pole there lies a bare Rock in the midst of the Sea. Its circumference is almost 33 French miles, and it is all of magnetic Stone...". Taylor, E.G.R. (1956). "A Letter Dated 1577 from Mercator to John Dee". Imago Mundi. 13: 56–68.
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