Abstract
In general, pollen and spores are present in the sediments of the deep ocean basins, particularly in deposits of terrigenous origin. Pollen spectra of abyssal sediments reflect the vegetation of adjacent land masses. Deposits of abyssal plains and oceanic rises with relatively little local relief, situated in the temporate zones, present the most favorable opportunities for obtaining a continuous history of vegetational and climatic changes during the Quaternary. The very slow rate of deposition in the ocean basins and the need to have relatively large core samples in order to obtain a sufficient number of pollen grains impose a limit on the detail with which reconstruction of vegetation and climate can be accomplished. Occurrence of reworked plant microfossils presents difficulties particularly where pre-Quaternary sediments are exposed on the continental shelf or slope.
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