polycyclic landscape (polyphase landscape) A land-form or landscape that has been acted on by the erosional processes associated with two or more partially completed cycles of erosion (see DAVISIAN CYCLE). A diagnostic feature is an abrupt break of slope (see KNICK POINT) in the profiles of both rivers and hillslopes.

polycyclic landscape(polyphase landscape) A landscape that has been acted on by the erosional processes associated with two or more partially completed cycles of erosion (see Davisian cycle). A diagnostic feature is an abrupt break of slope (see knick point) in the profiles of both rivers and hill-slopes.