Most parabolic dunes do not reach heights higher than a few tens of metres except at their nose, where vegetation stops or slows the advance of accumulating sand.
most parAbolic dunEs dO nOt REACh HeIGhts hiGher ThAn a FeW tEns oF mETREs eXcept at their nosE, wheRe VEgeTATion sTops OR slOwS the advaNCe of aCcumuLating sAnD.