. The Earth beneath the sea : History . CHANNEL 47°N FATHOMS Fig. 2. Typical trans-Atlantic profile from Newfoundland to England. The depths indicated in the lower portion of the figure are characteristic of this profile only, as the depths of all provinces gradually fluctuate along the length of the ocean basin. The physio- graphic provinces have been traced throughout the Atlantic and are believed to extend, in a general way at least, throughout all oceans possessing a median-rifted ridge. (Vertical exaggeration 40 :1.) 3500 3S00

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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom