Timing and east–west correlation of south Swedish ice marginal lines during the Late Weichselian

Lundqvist, Jan; Wohlfarth, Barbara

doi:10.1016/s0277-3791(00)00142-6

Cited by 147 publications

(157 citation statements)

References 56 publications

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“…Malmberg ). According to the most current accepted deglaciation model for southern Sweden, which uses a combination of calibrated radiocarbon ages, partly radiocarbon-dated clay-varve chronology, and geomorphology (Lundqvist and Wohlfarth 2001), this still-stand and/or readvance happened between 14.0 and 13.3 cal. ka BP, roughly corresponding to Greenland Interstadial 1 (Björck et al 1998).…”

Section: Study Area and Previous Researchmentioning

confidence: 99%

“…1); it is a distinctive feature since ice-marginal features reflecting active ice are very scarce in this part of the upland. New mapping of the moraine shows that it strikes across the tentative ice-marginal lines (isochrones) of the standard deglaciation model, and this indicates that the deglaciation pattern emerging from this new mapping is different from the deglaciation pattern previously assumed (Lundqvist and Wohlfarth 2001;Lundqvist 2002). Thus, dating of this feature would efficiently fill a gap in our knowledge of the deglacial history in the south Swedish Upland and would be useful to compare to other deglaciation chronologies from the region.…”

Section: Introductionmentioning

confidence: 99%

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New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

Johnsen

Alexanderson

Fabel

et al. 2009

Geografiska Annaler: Series A, Physical Geography

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. The overall pattern of deglaciation of the southern part of the Scandinavian Ice Sheet has been considered established, although details of the chronology and ice sheet dynamics are less well known. Even less is known for the south Swedish Upland because the area was deglaciated mostly by stagnation. Within this area lies the conspicuous Vimmerby moraine, for which we have used the terrestrial cosmogenic nuclide (10Be) exposure dating technique to derive the exposure age of six glacially transported boulders. The six 10Be cosmogenic ages are internally consistent, ranging from 14.9 ± 1.5 to 12.4 ± 1.3 ka with a mean of 13.6 ±0.9 ka. Adjusting for the effects of surface erosion, snow burial and glacio‐isostatic rebound causes the mean age to increase only by c. 6% to c. 14.4± 0.9 ka. The 10Be derived age for the Vimmerby moraine is in agreement with previous estimates forthe timing of deglaciation based on radiocarbon dating and varve chronology. This result shows promise for further terrestrial cosmogenic nuclide exposure studies in southern Sweden.

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Section: Study Area and Previous Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

Johnsen

Alexanderson

Fabel

et al. 2009

Geografiska Annaler: Series A, Physical Geography

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“…The successive retreat of the ice margin during the deglaciation in south western Sweden is spatially well constrained by moraines and ice-marginal glacifluvial deposits (Lundqvist and Wohlfarth, 2001). However, north of the Middle Swedish End Moraine Zone, at and above the highest shoreline, the deglacial geomorphological record is much more discontinuous and the deglaciation chronology is less well known (Lundqvist, 2002).…”

Section: Introductionmentioning

confidence: 99%

Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, Sw Sweden

Alexanderson

Fabel

2015

Geochronometria

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Abstract:Brattforsheden is a large glacifluvial deposit in southwestern Sweden and associated with it is one of Sweden's largest inland dune fields. Although the relative ages of the Brattforsheden deposits are well known, absolute ages from the area are few. In this study we have used optically stimulated luminescence (OSL), surface exposure ( 10 Be) and radiocarbon ( 14 C) dating to provide an absolute chronology for the deglaciation and for the Holocene development of the aeolian dunes. Our data show that the deglaciation took place just before 11 ka (11.5 ± 0.6 ka OSL, 11.3 ± 0.8 ka 10 Be), in line with the 14 C-based regional deglaciation age. Aeolian dunes started forming immediately after deglaciation and were active for at least 2000 years, well after vegetation had established. Renewed aeolian activity occurred 270-180 years ago, resulting in the deposition of sand sheets. Comparison between dating methods and studies of OSL dose distributions show that glacial, glacifluvial and littoral sediments suffer from incomplete bleaching and thus that mean OSL ages from such deposits overestimate the true depositional age. By using small aliquots and statistical age models, this effect can partly be countered. Also, some of the 10 Be ages appear too old, which may be due to previous exposure.

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“…In southwestern Sweden the last deglaciation started approximately 14 500 years BP and lasted for at least 5000 years producing a series of ice-marginal positions (Lundqvist and Wohlfarth, 2001). During this period deposition of glaciomarine sediments occurred in areas below sea level.…”

Section: Study Area and Data Descriptionmentioning

confidence: 99%

Application of a fast and efficient algorithm to assess landslide-prone areas in sensitive clays in Sweden

Melchiorre

Tryggvason

2015

Nat. Hazards Earth Syst. Sci.

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Abstract.We refine and test an algorithm for landslide susceptibility assessment in areas with sensitive clays. The algorithm uses soil data and digital elevation models to identify areas which may be prone to landslides and has been applied in Sweden for several years. The algorithm is very computationally efficient and includes an intelligent filtering procedure for identifying and removing small-scale artifacts in the hazard maps produced. Where information on bedrock depth is available, this can be included in the analysis, as can information on several soil-type-based cross-sectional angle thresholds for slip. We evaluate how processing choices such as of filtering parameters, local cross-sectional angle thresholds, and inclusion of bedrock depth information affect model performance. The specific cross-sectional angle thresholds used were derived by analyzing the relationship between landslide scarps and the quick-clay susceptibility index (QCSI). We tested the algorithm in the Göta River valley. Several different verification measures were used to compare results with observed landslides and thereby identify the optimal algorithm parameters. Our results show that even though a relationship between the cross-sectional angle threshold and the QCSI could be established, no significant improvement of the overall modeling performance could be achieved by using these geographically specific, soil-based thresholds. Our results indicate that lowering the cross-sectional angle threshold from 1 : 10 (the general value used in Sweden) to 1 : 13 improves results slightly. We also show that an application of the automatic filtering procedure that removes areas initially classified as prone to landslides not only removes artifacts and makes the maps visually more appealing, but it also improves the model performance.

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Timing and east–west correlation of south Swedish ice marginal lines during the Late Weichselian

Cited by 147 publications

References 56 publications

New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

Holocene Chronology of the Brattforsheden Delta and Inland Dune Field, Sw Sweden

Application of a fast and efficient algorithm to assess landslide-prone areas in sensitive clays in Sweden

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