Geomorphological studies on the Quaternary landscape development in lesser known areas of eastern Zaire (Kivu) proved by geochemical and sedimentological evidence showed that the recent rain forest areas within so called core-areas were presumably
Since the 1950's the silification of plants, known as opal phytoliths, has been applied successfully for paleoecological research. The methodology is to compare with the palynology in Quaternary studies. In soil samples from Zaire fossil phytoliths