"The Sea Bottom off Florida and Cuba" as published by Petermann's Geographische
Mittheilungen in 1870. This map was drawn by Louis Francois de Pourtales of the
the United States Coast Survey. Pourtales Plateau was named by Louis
Agassiz, the first undersea feature off the continental shelf in U.S. waters
that was discovered as the result of oceanographic exploration.
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