debris flows;rock avalanches;deep-seated landslides;flysch;Western Carpathians

Ancient flow-like landslides are relatively frequent fossil forms of the georelief in midmountain conditions of the Czech Carpathians. Sixty rather distinctive displays of debris flows, rock avalanches and debris avalanches have been mapped in the uppermost part of the territory. Unlike contemporary sporadic and little voluminous debris flows, ancient (Pleistocene and Lower Holocene) accumulations are a few orders more extensive and were of considerable geomorphologic significance in forming steep sections of mountain valleys and slopes. This regularity does not hold for flow-like landslides the source of which is material loosened as a consequence of numerous deep-seated landslides. Due to deep disruption of slopes a few high-magnitude flow-like landslides (e.g. rock avalanches), quite rare in flysch midmountain conditions, occurred also in Late Holocene.

Ancient flow-like landslides are relatively frequent fossil forms of the georelief in midmountain conditions of the Czech Carpathians. Sixty rather distinctive displays of debris flows, rock avalanches and debris avalanches have been mapped in the uppermost part of the territory. Unlike contemporary sporadic and little voluminous debris flows, ancient (Pleistocene and Lower Holocene) accumulations are a few orders more extensive and were of considerable geomorphologic significance in forming steep sections of mountain valleys and slopes. This regularity does not hold for flow-like landslides the source of which is material loosened as a consequence of numerous deep-seated landslides. Due to deep disruption of slopes a few high-magnitude flow-like landslides (e.g. rock avalanches), quite rare in flysch midmountain conditions, occurred also in Late Holocene.