Figure F4. Comparison of concentrations of organic carbon and calcium carbonate in Miocene, Pliocene, and Pleistocene sediments from Sites 1087, 1085, 1084, and 1082 in Cape and Walvis Basins and Sites 532 and 1081 on Walvis Ridge. Variable dilution of organic matter by carbonates contributes to the well-developed color cycles in sediments from Sites 532, 1081, 1082, and 1084.