DE PALEOHYDROLOGIE VAN HET REESTDAL (DR.)

Samenvatting

lnvestigations have been made into the hydrology of the Reest, a small river flowing on the border of the boulder-clay plateau of the province of Drenthe and the Pleistocene sand of the province of Overijssel, in order to obtain information on the chronology of the hydrological system. Orga­nic deposits may indicate the local water level in the sandy valley of the Reest. Low level parts, cut off from the main stream by driftsand possi­bly during the Late Glacial, contain gyttja and peaty deposits formed in shallow water-lily pools. The age of this deposit is 9420±80 BP. More to the east, the shallow peat formation that covers the flat valley bottom near Schrapveen started to grow around the beginning of the At­lantic period. A radiocarbon date of 7100±60 BP was obtained for this level. The Drentse A, a small river on the north side of the Drenthe pla­teau, correlates palynologically with the Reest.