De Hassebergril (Sellingen, Gr.) opnieuw bezocht
The Hassebergril (Sellingen, province of Groningen) revisited. The so-called Hassebergril, a fossil streamlet in the former Bourtangermoor peat bog, running parallel to the more extensive Ruiten Aa system, is investigated in a fairly flat part of the peat reclamation region. The silting up of its broad and shallow valley shows two or three channels, initially with some water transport, but soon dominated by local sediments reflecting a stagnant, waterlogged environment. Compared with the Ruiten Aa system, the Hassebergril is of a younger origin, and it was choked by peat growth as late as the end of the 1st millennium AD. This part of the investigation deals with the field observations on geomorphology and sedimentology.