ändmoräner I Sverige - Canal Midi

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They are subglacial bedforms with no geochronological meaning, except that they formed during one single surge cycle. As the marginal zone of the ice sheet calved and thinned, it was lifted by proglacial water and the whole group of moraines became free of ice almost simultaneously. This is a wonderful LIDAR image of De Geer moraines in SW Finland. These stringy little moraines are generally assumed to form parallel to the retreating ice front -- but some way up-glacier from the ice edge -- in conditions where the bed material is saturated and where the ice is almost being lifted off the bed in a lake or marine environment. The mapped pattern of moraines implies that, shortly after the last maximum glaciation, the tidewater ice sheet began to retreat north from German Bank, forming De Geer moraines at the grounding line with at least one glacial re‐advance during the general retreat. Numerous regularly spaced, parallel, linear to curvilinear ridges of sediment are recognized to form at or close to the grounding lines of water-terminating glaciers (Lindén & Möller 2005).

A type of moraine landscape that consists of a series of separate, narrow ridges trending parallel to a former ice front, and which can form annually. The ridges may be up to 300 m apart and up to 15 m high. Glaciofluvial De Geer moraines have rarely been described in detail in the literature. This study presents a model for the genesis of moraines of this type in the Chapais area, Québec. The model is based mainly on facies and deformatin structures analysis, and geomorphological data.

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Present use of 'De Geer moraine' refers to closely spaced Sections across three De Geer moraines show that the ridges are composed of diamictons and fine-grained sediment, partly in stacked sequences. The diamicton These data and resultant thematic maps revealed, for the first time, such features as streamlined till ridges, end-moraine ridges, and De Geer moraines that are Kvarken Archipelago World Heritage Site, Korsholm Picture: View over the Saltkaret Watch Tower and the unique de Geer Moraines in Svedjehamn, Björköby in Lobate regional moraines (>10km long) are concave to the northwest, up-ice De Geer moraines at the grounding line with at least one glacial re-advance Based on the close 1 : 1 association with regularly spaced, sharp-crested ridges interpreted as De Geer moraines, we interpret the esker beads to be quasi- annual as well as of ridges of De Geer moraines. The of the De Geer moraines is related to the last till sheet of nummi; 3, De Geer moraine at Tiikerinkallio; 4, De .

Using airborne 2000: Common origin for De Geer moraines of variable composition in Raudvassdalen, northern Norway. Journal of Quaternary Science 15, 633–644.
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The focus of this study was to examine the environment the ridges form in, regarding the water depth during creation, the importance of topography and the melting rate of the ice. De Geer -moreenit ovat aaltomaisia kapeita moreeniharjanteita, jotka voivat muodostaa laajojakin kymmenien tai jopa satojen harjanteiden kenttiä.Ilmakuvassa ne muistuttavat vanhan ajan pyykkilautaa. 2 V. Bouvier et al.: De Geer moraines in Sweden GFF 00 (2015) Fig. 1.Plate 23 from De Geer (1940) showing an oblique aerial photograph of an area near Bromma, Stockholm. The dotted white lines are (De Geer 1889), have modest heights and widths and variable lengths.

by Mandy Munro.
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Finally De Geer moraines (DGMs) are small ridges that were formed at the grounding line during ice retreat by glaciers whose margins terminated in water. They are These are: Rogen moraine, De Geer moraines, a few other types of transverse ridges, Veiki moraine with its different subtypes, and drumlinized hummocky DeGeer moraines are formed under water at the face of a retreating glacier. The small parallel moraines result from the seasonal oscillation in the position of the De Geer moraines on German Bank, southern Scotian Shelf of Atlantic Canada.

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De Geer moraines in a Swedish mountain area?