. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CAMPANIAN AND MAASTRICHT!AN OSTRACODA 151 rapid minor regr. ! i rapid transgr. rapid transgr. slow transgr. water depth ostr (00m) assembl outer Agulhas Bank III II Monzi-Nibela Igoda I ? Needs Camp BH-9 Umzamba MAASTRICHTIAN v "1 Tv ' mi 1 Ti r CAMPANIAN 6&7 5b 5a 4b- '"3 . "2 = Til r ii SANTONIAN 65 70 75. 80 JC-1 borehole metres .deep , intermediate shallow Fig. 73. Sea-level fluctuations in south-east Africa during Santonian II to Maastrichtian II times
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CAMPANIAN AND MAASTRICHT!AN OSTRACODA 151 rapid minor regr. ! i rapid transgr. rapid transgr. slow transgr. water depth ostr (00m) assembl outer Agulhas Bank III II Monzi-Nibela Igoda I ? Needs Camp BH-9 Umzamba MAASTRICHTIAN v "1 Tv ' mi 1 Ti r CAMPANIAN 6&7 5b 5a 4b- '"3 . "2 = Til r ii SANTONIAN 65 70 75. 80 JC-1 borehole metres .deep , intermediate shallow Fig. 73. Sea-level fluctuations in south-east Africa during Santonian II to Maastrichtian II times. Suggested water depths relate to predicted sedimentary environments for ostracod assemblages 1-7 (see Tables 6, 9, and Dingle 1980). Time scale is that of Van Hinte (1976), and ages of Kennedy & Klingers (1975) ammonite stage subdivisions are nominal. Upper part of diagram relates to Zululand (BH-9 and outcrops between Monzi and Nibela). Single ostracod populations from Igoda, Needs Camp, and Agulhas Bank have been used to predict water depths at these localities for specific times. Lower part of diagram shows suggested temporal distribution of sections 1-6 (shaded) in JC-1 borehole. Table 10 gives details of predicted sedimentary environments for these sections of the borehole. the spacing and rapidity of the various sea-level fluctuations that affected the area in late Cretaceous times. As noted by several authors ( Kennedy & Klinger 1975; Dingle 1978), the Upper Cretaceous transgression in Zululand is a southward younging phenomenon and the BH-9 succession documents its appearance in the Richards Bay area in Santonian II times. Water depth increase was relatively slow (perhaps 200 m in 3,5 , 57 ) through Santonian II to Campanian I times, with a more rapid rise (—133 ) in late Campanian I/early Campanian II. Data from the area farther north (Monzi and Nibela) indicate a stand (in this area at a mid shelf, say 200 m depth) for about 3 duri
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