Figure F5. Schematic diagram of the overall transitions in fluvial terrigenous input, productivity (overall productivity and diatom abundance), and aridity established for Holes 1076A and 1077A, located in the Congo Basin, over the past 1.2 m.y. Periods of marine and terrigenous influences on productivity are shown, in addition to periods where incursions of waters from the south and north are identified. ABF = Angola-Benguela Front, MPR = mid-Pleistocene revolution.