<br/>Quaternary geogenesis in eastern Surinam was studied by field methods and sedimentary-petrographic research. The development of the river valleys was explained in terms of changes in sea level, tectonic movements and changes in climate. A preliminary stratigraphy was established.<p/>Eight soil profiles were selected for a detailed study of pedogenesis. For this purpose the field data were combined with the results of thin-section analysis and chemical research, including X-ray microprobe analysis. To interpret the mechanical data, a rectangular diagram after Doeglas was used. The chemical data were recalculated into the normative mineralogical composition according to van der Plas & van Schuylenborgh and Burri. Thus bioturbation, clay migration, ferrallization, plinthization, podzolization and the genesis of arable soils were studied.<p/>27 soil profiles were classified by the American, the French, and the Brazilian system.
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