. Fig. 52. Distribution of phosphate (mg. ats. ). Section off Walvis Bay, 6-8 March 1950, survey I. Positions of stations are shown in Fig. 1. plete absence of phosphate values of up to 0-5 mg. ats. were found. The upwelled coastal waters present a sharp contrast. In them the phosphate content is very high, on occasion reaching more than 2-0 mg. ats. Below the surface-waters the phosphate concentration increases down to the sea-bed inshore and

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