. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. I go ANNALS OF THE SOUTH AFRICAN MUSEUM. times, the series of fossil beaches, testifying to repeated marine transgression during which sea-levels reached altimetric maxima of 75-90 (oldest), 45-50, 29-34, 17-21, 7-8, 5 and 2 (youngest) metres, accords very nearly with the well documented succession of Pleistocene strands along the Atlantic coast of Morocco (Biberson, 1963; Butzer, 1966). Although the coarse, porous, marine sands of the 75-90 m transgression have, so far, proved to be barren of animal
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. I go ANNALS OF THE SOUTH AFRICAN MUSEUM. times, the series of fossil beaches, testifying to repeated marine transgression during which sea-levels reached altimetric maxima of 75-90 (oldest), 45-50, 29-34, 17-21, 7-8, 5 and 2 (youngest) metres, accords very nearly with the well documented succession of Pleistocene strands along the Atlantic coast of Morocco (Biberson, 1963; Butzer, 1966). Although the coarse, porous, marine sands of the 75-90 m transgression have, so far, proved to be barren of animal remains, the succeeding beaches are abundantly fossiliferous. The oldest of these shell-bearing beds, laid down during the 45-50 m inundation, has yielded more than 120 species of molluscs of which only seventeen of the twenty forms here described, plus the previously recorded Chamelea krigei Haughton and Fissurella robusta Sowerby, are not found living in the seas surrounding the coasts of South Africa. The stratigraphic correlation alluded to earlier, the high proportion (84%) of species extant in the present seas, the low degree of lithification and the extraordinary 'fresh' appearance of the invertebrate remains together militate against the acceptance of an age other than Pleistocene for these sands and gravels laid down during the 45-50 m transgression. Comparison with the Mediterranean and Moroccan marine Pleistocene successions, based solely on altimetric evidence, suggests a date equivalent to the Maarifian (Morocco) or Milazzian (Mediterranean) for this high sea stand. Succession Loose surface sand — unconformity— 2 m Transgression complex Highly fossiliferous sands and gravels; berm sands. — unconformity— 5 m Transgression complex Slightly calcareous sands and shelly granule gravels — unconformity— 7-8 m Transgression complex Stabilised berms; calcareous, often highly garneti- ferous marine sands over well-developed boulder gravels . — unconformity—
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
