Information obtained from a preliminary palynological investigation of six ocean-bottom cores from the southwestern Atlantic Ocean permits tentative correlation of the cores with one another based on variations in the percentages of reworked pollen and spores. High percentages of reworked grains are thought to be a reflection of base-level lowering resulting from Plesirocene continental glaciation. Many of the cores studied were collected from depths too great for foraminiferal preservation and plant microfossils may provide the only means by which some of these cores can be correlated with one another. Cores collected closer to the shore line tend to have a greater variety of plant microfossils than do those cores taken far from the coast. Some of the thicker-walled grains such as Ephedra and Chenopodium-type pollen are persistently present in all productive samples suggesting that these plant microfossils are selectively transported and concentrated in ocean-bottom sediments or perhaps they survive where the thinner-walled pollen are destroyed.