Different types of fossil frost fissures in south Sweden

Johnsson, Gunnar

doi:10.1080/11035898609452641

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…The transverse moraine areas in Sweden are interpreted as melt-out tills formed subglacially as a combination of initial subglacial compressive flow followed by stagnation and melt-out. The data presented here in combination with periglacial conditions in the deglaciation period as reported by Johnsson (1986) indicate an ice sheet with a cold-based compressive marginal zone few kilometers wide (see also Aber 1982, Moran et al 1980. Detailed investigations of transverse moraine areas in central Sweden (Shaw 1979) and Canada (Bouchard 1989) show that thrusting and folding due to inglacial compressive flow can involve subglacial sediments and underlying bedrock as well.…”

Section: Sequence 2 Proglacial Delta-ice Lake and Fluvial Depositssupporting

confidence: 57%

Late Weichselian deglaciation pattern in the southwestem Baltic: Evidence from glacial deposits off the island of Møn, Denmark

Jensen¹

1993

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Shallow seismic investigations and sediment sampling were carried out in the Hjelm and Fakse Bugt (Bay) off the island of M!iin, Denmark. Ribbed moraine morphology is observed in the Hjelm Bugt area while results from seismic studies in Fakse Bugt reveal two different late-glacial sequences: 1; glacial diamict and 2; pro glacial, delta - ice lake and fluvial deposits. These deposits originate from the final Late Weichselian deglaciation. Within sequence 1 two units can be distinguished. Unit l.a consists of glacial deposits dislocated by thrusting that form asymmetrical ridges on the sea floor, unit l .b is not pre-consolidated, (soft) diamict interpreted as supraglacial flow diamict. Sequence 2 can likewise be subdivided in two units a and b. These can be characterized as delta deposits formed in a glacial lake in which a sudden lowering of the water-level caused a break of the sedimentation. Earlier studies from the Skane area (southern Sweden) report a similar depositional pattern during deglaciation. The deposits consist here of asymmetrical ridges, interpreted as Rogen moraines. They were resting on and covered with flow diamict deposits and water layered deposits, thought to have been formed by an arctic glacier with a cold-based compressive marginal zone. From the comparison of onshore glaciotectonic and morphological data with the offshore data presented, it is concluded that the Mons Klint cliff section was formed under glaciotectonic compression between two ice lobes, one from a north-eastern and another from a south-eastern direction. The formation of M!iins Klint was thus associated with a final Weichselian readvance.

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Section: Sequence 2 Proglacial Delta-ice Lake and Fluvial Depositssupporting

confidence: 57%

Late Weichselian deglaciation pattern in the southwestem Baltic: Evidence from glacial deposits off the island of Møn, Denmark

Jensen¹

1993

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“…Kolstrup, 1985;Jacobsen, 1978). Such features are also found in southern Sweden, dated to the same period (Johnsson, 1959(Johnsson, , 1986Svensson, 1987). There are also clear indications for periglacial activity between ca.…”

Section: Periglacial Activity and Soil Developmentmentioning

confidence: 59%

Late Weichselian environmental change in southern Sweden and Denmark

Berglund

Björck

Lemdahl

et al. 1994

J Quaternary Science

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A synthesis is presented of the environmental and climatic variations that are inferred to have occurred in southern Sweden (up to latitude 59"N) and Denmark during the Weichselian Late-glacial (1 4-9 kaBP). The chronology and characteristics of the main phases of deglaciation, sea-level change, periglacial activity, soil development, vegetation cover and climate change are summarised. A curve representing the main changes in temperature, including quantitative estimates based upon beetle data and using the 'mutual climatic range' method, is presented.Journal of Quaternary Science

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“…As to the visual appearance of wedge casts, there is a great diversity, depending upon the host material and the infill of the structure (Figs 2 and 3). Most structures which have been described are located in sorted sediments, especially of glaciofluvial origin (Johnsson, 1956(Johnsson, , 1962b(Johnsson, , 1986Svensson, 1964aSvensson, , 1973Hillefors, 1969;Christensen, 1974;Kolstrup, 1980). This is valid also for wedge occurrences in old (Saale) landscapes outside the limit of the last glaciation.…”

Section: Wedge Structures In Vertical Sectionmentioning

confidence: 99%

Ice‐wedge casts and relict polygonal patterns in Scandinavia

Svensson

1988

J Quaternary Science

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Ice-wedge casts in Scandinavia frequently occur in three regions: (a) southwestern Jutland (outside the limit of the Weichselian glaciation); (b) southwestern Sweden; and (c) northernmost Norway. The latter two areas are both early deglaciated regions. Characteristics of casts in vertical sections are discussed with reference to the host and infilling material. Aerial photographs provide an effective tool for detecting relict ice-wedge polygons (crop marks, micrornorphology). Experience from present-day permafrost regions with active ice-wedge formation helps to explain the palaeoclimatic significance of the relict polygons. Attempts to establish the ages of formation are discussed from a methodological point of view.

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Different types of fossil frost fissures in south Sweden

Cited by 9 publications

References 10 publications

Late Weichselian deglaciation pattern in the southwestem Baltic: Evidence from glacial deposits off the island of Møn, Denmark

Late Weichselian deglaciation pattern in the southwestem Baltic: Evidence from glacial deposits off the island of Møn, Denmark

Late Weichselian environmental change in southern Sweden and Denmark

Ice‐wedge casts and relict polygonal patterns in Scandinavia

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