Sprawling like a high-humped lizard on the bed of the Atlantic Ocean is a mighty ridge, its lazy length (about 50 degrees N. lat. to 40 degrees S. lat.) following the S-shaped outlines of the continents on either side. A sheer 9,000 feet of height, it towers in the way of deep sea fishes scurrying from Pernambuco to Benguel. Its knobby head rises curiously above the waters in the north (Azores plateau); St. Paul, Ascension Island, and Tristan da Cunha mark its southern peaks.
Long before the days of scientific dredging, Plato and his friends...
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