Drift sand and river dune, valuable (history)

Geologically valuable drift sand areas and river dunes (deck edge ridges and cups). Provincial Environment Plan Drenthe POP, map 6. and Provincial Environment plan Drenthe POPII, map 6.具有地质价值的漂砂（drift sand）区域与河成沙丘（台地边缘脊与杯状地貌）。德伦特省省级环境规划POP第6号图件，以及德伦特省省级环境规划POPII第6号图件。