Chronostratigraphy and paleoclimatic meaning of cryogenic deformations in the Central European loess

摘要: Cryoturbations in loess reflect cold and wet environments but not necessarily permafrost. Only flat bottomed cryoturbations are indicative of it. Outside the permafrost zone they occur during period last glaciation: early Weichselian, lower pleniglacial, end middle pleniglacial late glacial. Their morphology ist related to frost susceptibility superimposed layers, expressed form differential heaving, ruled by drainage quality gradient. diagenesis is discussed.