Periglacial slope planations in the southern Pennines, England
DOI:
https://doi.org/10.26485/BP/1981/28/8Keywords:
mass wasting, congelifractate, cryoplanation terraceAbstract
An examination of the morphology and regolith characteristics of valley-side benches and their bounding slopes in the upper Derwent basin demonstrates that the benches are periglacial slope planations exhibiting strong structural control. They are best developed against the dip but occur also along the strike óf the alternating hard and soft rocks. During periglacial times, the congelifractate from the retreating sandstone or gritstone escarpments together with the products of corrasion of the predominantly shale planations beneath them were transported towards the valley axes and at least in some cases down-valley by solifluction. At some time during the development of the slope planations stream inciaion occurred, truncating the distal portions of the slope planations and converting them to benches.
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