hillwash

Colluviation, the burial of a site by sediments moved by gravity (called hillwash) can also happen at sites on slopes.

Farming would have greatly increased and caused significant changes in the fluvial sediment regime through woodland clearance and colluvial hillwash.

The second trench was 8m long and 2m wide and crossed the west wall of the milecastle, it showed the structure to be buried beneath a deep layer of hillwash.

Unlike many soils in which there are easily distinguished layers or soil horizons, a chalk rendzina soil consists of only a shallow dark humus rich surface layer which grades through a lighter brown hillwash containing small pellets of chalk, to the white of the chalk itself.