. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Nncoode ridges region I NE Comaim -lao S\£?$£f Coonmin PmoU **_/[ > \ i i i "Zz^^-^^r. ^gZ .. 3" i ' i ' , ' , ! , 1 -so K-^Vn i i'i i i i i iiii I'l-TrnTT'i'i'i'i'i'i'i'i'i'i'i'i'i/1'1'1'1"^ fbi i iT'i Vi'iVi Vi Vi Vi Vi11 ViViVi Vi'i'i'iYi'iVi'iVi1/ ^s_, BEACH DEPOSITS |vrOr| LOXTON SANDS !?•.•.•• .•.••.•! BRIDGEWATER FM |beacX ndgc| I1 1 MALAN6ANEE FM BRI06EWATER FM IcUy S sill REWORKED BAMBIER LIMESTONE EOCENE i OLDER ROCKS | 1 PIEZOMETRIC SURFACE. Fig. 5. Sections across the Lo
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Nncoode ridges region I NE Comaim -lao S\£?$£f Coonmin PmoU **_/[ > \ i i i "Zz^^-^^r. ^gZ .. 3" i ' i ' , ' , ! , 1 -so K-^Vn i i'i i i i i iiii I'l-TrnTT'i'i'i'i'i'i'i'i'i'i'i'i'i/1'1'1'1"^ fbi i iT'i Vi'iVi Vi Vi Vi Vi11 ViViVi Vi'i'i'iYi'iVi'iVi1/ ^s_, BEACH DEPOSITS |vrOr| LOXTON SANDS !?•.•.•• .•.••.•! BRIDGEWATER FM |beacX ndgc| I1 1 MALAN6ANEE FM BRI06EWATER FM IcUy S sill REWORKED BAMBIER LIMESTONE EOCENE i OLDER ROCKS | 1 PIEZOMETRIC SURFACE. Fig. 5. Sections across the Lower Southeast of South Australia to show the association of aeolianite beach ridges with bedrock, breaks of slope (compiled from borehole data). recorded it is essential to establish whether the site lies landwards or seawards of the deposit. On the Eastern Cape coast between Kwaaihoek and Kleinemonde aeolianite outcrops in cliffs, on the beach and extends seawards in a north-easterly direction as reefs (Fig. 3). The base of the deposit is only rarely exposed. In the Bushman and Kariega estuaries aeolianite rests on and incorporates beach cobbles at — 1 to —2 m below mean sea-level. Since this aeolianite extends seawards, this altitude can be taken to be the landward altitude of the marine bench that has been incised. At Port Alfred another aeolianite rests on Cape System bedrock at an altitude of approximately 4 m (Mountain 1962). Inland from the coastal aeolianite at Kenton-on-Sea a marine cliff is cut into the Coastal Limestone with a summit bevel at 60 m, which is overlain by another, presumably older aeolianite. Further aeolianite deposits mapped with the Coastal Limestones overlie other breaks of slope inland. However, even if the coastal outcrops alone are considered, it is apparent that remnants of a series of ridges exist (Fig. 3). CONCLUSIONS Comparison of Australian and South African deposits has emphasized certain salient facts. Aeolianite depo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
