Unterhoehlung,Unterspuelung /SCIENCE/
[DE] Unterhoehlung; Unterspuelung
[EN] undercutting (of a cliff); undermining (of a cliff)
[FR] excavation; sapement
Unterspuelung,Unterwaschung
[DE] Unterspuelung; Unterwaschung
[EN] undermining scouring; underwashing; washing away
[FR] affouillement; délavage