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Description
The east coast of the United States showing the continental shelf, shelf break, continental slope, and sediment types. This was one of the first publishedmaps of this nature. The Coast Survey had rediscovered the continental shelfbreak in 1848. Count Luigi Marsili had first noted it in the Gulf of Lyon about 1720 but that information had been forgotten in the mid Nineteenth Century. (Image credit: NOAA Central Library Historical Collection)