. The Earth beneath the sea : History . Fig. 22. 35° 12'N, 15° 18'W. Depth 1293 m. Seamount northeast of Madeira. Area of picture 1| by U m. (Photo by ) Symmetrical ripple marks in Globigerina sand (wave-length 25 cm).

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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom