Eskers were investigated in an area with overall terrestrial deglaciation ‐ the eastern part of the province of Skåne and adjacent areas in southern Sweden. On the basis of the proposed model of esker formation, the dynamics of the receding Weichselian Ice Sheet are discussed. The deglaciation was characterized by the gradual retreat of an active ice sheet, bordered by a zone of thin, stagnant ice. For the most part, the ice sheet was probably at the pressure melting point in a marginal zone, where it was penetrated by surface meltwater which constituted most of the subglacially flowing meltwater. The esker sediments, consisting of glaciofluvially reworked basal debris and basal till, accumulated progressively in an up‐glacier direction. Deposition took place close to the live ice boundary in the zone with stagnant ice that fringed the receding ice sheet. The time‐transgressive formation of the eskers is reflected by repeated sediment sequences (morphosequences), i.e. sedimentary units composed of ridges that merge into extended hummocky deposits in a down‐glacier direction. They represent the momentary deposition of stratified drift in the proximal portion of the zone with stagnant ice.
Åmark, Max 1986 06 01: Glacial tectonics and deposition of stratified drift during formation of tills beneath an active glacier – examples from Skåne, southern Sweden. Boreas, Vol. 15, pp. 155–171. Oslo. ISSN 0300–9483.
Three exposures in till have been investigated in Skåne, southern Sweden. The tills were deposited at the base of an active glacier, and are largely made up of subglacially deposited stratified drift. Deformation of the till took place syndepositionally, resulting in high‐angle fractures, clastic dikes, shear planes and folds, and in irregular deformational structures. The stratified drift was transformed into a more or less diamicton‐like material by the deformation. The orientation of clasts was influenced by the action of the subglacial meltwater and the shearing from the overriding glacier. The tills accumulated at most 100 km inside the margin of the receding glacier.
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