Subglacial sediment, proglacial lake-level and topographic controls on ice extent and lobe geometries during the Last Glacial Maximum in NW Russia

Larsen, Eiliv; Fredin, Ola; Jensen, Maria; Кузнецов, Д. Д.; Lyså, Astrid; Subetto, Dmitry

doi:10.1016/j.quascirev.2013.02.018

Cited by 31 publications

(45 citation statements)

References 38 publications

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“…Farther east, down-ice from areas of ribbed moraine in Finland and western Russia, extensive drumlin fields are present ( Fig. 5F, 6; Larsen et al, 2014). This demonstrates basal sliding and faster ice flow compared with areas of relict landscapes and ribbed moraines farther up-ice.…”

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 89%

“…Note that soft (deformable) sediments are also found in 'hard' rock terrains, most notably east of the Scandinavian mountains (Kleman et al, 2008 (Ottesen et al, 2005b) (Fredin et al, 2012;Larsen et al, 2014). (Fredin et al, 2012;Larsen et al, 2014). (Ottesen et al, 2005a;Winsborrow et al, 2010;Bjarnadottir et al, 2014), drumlin fields (Hättestrand & Clark, 2006;Winsborrow et al, 2010;Fredin et al, 2012;Kalm & Gorlach, 2014;Larsen et al, 2014, cf.…”

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

“…The western profile is modified from Sejrup et al (2009) and Mangerud et al (2013). The eastern profile is based on data in Demidov et al (2006), Johansson et al (2011) and Larsen et al (2014 (Berger & Loutre, 1991), global ice-volume variations in sea-level equivalents (Lambeck et al, 2006) and the contribution of the Eurasian Ice Sheet to global sea level ice-sheet bed (Fig. 7).…”

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

“…Terrain sloping towards the advancing ice is also shown. Note that soft (deformable) sediments are also found in 'hard' rock terrains, most notably east of the Scandinavian mountains (Kleman et al, 2008 (Ottesen et al, 2005b) (Fredin et al, 2012;Larsen et al, 2014). (Fredin et al, 2012;Larsen et al, 2014).…”

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

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Causes of time-transgressive glacial maxima positions of the last Scandinavian Ice Sheet

Larsen¹,

Fredin²,

Lyså³

et al. 2016

NJG

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Reconstructions of ice cover during the time spanning the Late Weichselian maximum show a confluent Eurasian ice sheet with the Scandinavian Ice Sheet positioned between the Svalbard-Barents-Kara and the British-Irish ice sheets. It has long been suspected among glacial geologists that the maximum ice-marginal position was asynchronous, but only recently has it been possible to explore this in some detail. Dates pertaining to the ice margin of the Scandinavian Ice Sheet reveal an old (29-25 ka) maximum position along its western flank, whereas a younger (18-16 ka) maximum position has been delineated along its eastern flank. A time -distance diagram across the Scandinavian Ice sheet shows an oscillatory western ice front, as opposed to a steadily growing and decaying eastern ice margin. The largest age difference between maximum positions is as much as 10 ka between different sectors of the Scandinavian Ice Sheet. Older maximum positions of the western margin can be explained by its proximity to icegrowth centres, initial windward ice growth, efficient ice drainage in ice streams on the Norwegian continental shelf, and the continental shelf break being a barrier to further westward expansion. Younger maximum positions of the eastern margin can be explained by a very long distance between ice-growth centres and marginal positions, slow flow in a wide zone of cold-based to partly cold-based ice, and punctuated advances of low-gradient ice lobes into proglacial lakes along the extreme eastern perimeter of the ice sheet. The influence of these lakes on the glacier dynamics of adjoining ice lobes prolonged the ice sheet advance by some 1 to 3 ka compared with adjacent interlobate areas.

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Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 89%

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

Section: N O R T H S E a N O R R B O T T E N G U Lf O F B O T H N Ia mentioning

confidence: 99%

See 2 more Smart Citations

Causes of time-transgressive glacial maxima positions of the last Scandinavian Ice Sheet

Larsen¹,

Fredin²,

Lyså³

et al. 2016

NJG

Self Cite

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“…Still, a broad picture of the events that took place in western and southern Finland and adjacent areas to the east during the Late Pleistocene is relatively well established (Nenonen, 1995;Lunkka et al, 2004;Svendsen et al, 2004;Lunkka et al, 2008;Salonen et al, 2008;Pitkäranta et al, 2013;Johansson et al, 2011;Larsen et al, 2014). However, there are still unresolved and disputed questions relating to the glaciation history of Finland.…”

Section: Introductionmentioning

confidence: 99%

Stratigraphy of the Koivusaarenneva exposure and its correlation across central Ostrobothnia, Finland

Lunkka¹,

Lintinen²,

Nenonen³

et al. 2016

Bull Geol Soc Finland

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A multiple till succession at Koivusaarenneva in Central Ostrobothnia, adjacent to the Gulf of Bothnia, was studied using conventional sedimentological techniques. In addition, a sand-rich unit between two till beds was dated by the Optical Stimulated Luminescence (OSL) method and organic-bearing silt was subjected to pollen analysis. The methods were applied to determine the Pleistocene sedimentation history of the area. The results obtained indicate that the lowest till above the crystalline bedrock at Koivusaarenneva was deposited from the NNW during the Saalian glaciation, whereas the organic-bearing sediments and deformed sand and silt above, were laid down during the Eemian and the Early Weichselian stages. Two till beds above the Early Weichselian sediments indicate that at least two separate Scandinavian Ice Sheet advances took place in the area, most likely in the early Middle Weichselian and the Late Weichselian substages.

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Limited extension of the MIS 2 proglacial lake in the Severnaya Dvina valley, south‐eastern margin of the last Scandinavian Ice Sheet

Zaretskaya,

Utkina,

Baranov

et al. 2023

J Quaternary Science

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The Severnaya Dvina River valley crosses the former south‐eastern margin of the last Scandinavian Ice Sheet. Despite a long research history, there remains considerable controversy about the maximum ice‐sheet extent and the expansion of proglacial lakes within the Severnaya Dvina fluvial system. The goal of this study was to address these issues using new material from the valleys of the Severnaya Dvina and the lower Vychegda, thereby contributing to an understanding of the history of the south‐eastern sector of the last Scandinavian Ice Sheet and its periglacial areas. We studied a number of geological sections using radiocarbon and optically stimulated luminescence (OSL) dating, pollen and carpological analyses, and found that the Last Glacial Maximum (LGM) proglacial lake occupied the Severnaya Dvina valley between 20–19 ka and about 15.5 ka. The lake was localized within the proglacial isostatic depression and occupied only the Severnaya Dvina valley extending no further than the confluence of the Vychegda River, no more than 110 km from the edge of the ice sheet. The lake formation did not cause any drainage reorganization within and outside the Vychegda fluvial system. Given the small size of the lake and presence of the oldest OSL ages along the entire length of the former lake, we suggest that the onset of the proglacial lake marks the maximum extent of the ice sheet in the area. Consequently, the onset of the local LGM may be dated to 20–19 ka, somewhat earlier than assumed by most previous researchers. The LGM ice sheet boundary was located in the Severnaya Dvina valley downstream from the Vychegda confluence and did not extend into the Vychegda valley, despite previous suggestions. During deglaciation, the lake disappearance together with crustal rebound caused an incision episode in the Vychegda – Severnaya Dvina system and the formation of the Lateglacial alluvial terrace with relative height rising downstream due to the uneven rates of the postglacial uplift.

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Subglacial sediment, proglacial lake-level and topographic controls on ice extent and lobe geometries during the Last Glacial Maximum in NW Russia

Cited by 31 publications

References 38 publications

Causes of time-transgressive glacial maxima positions of the last Scandinavian Ice Sheet

Causes of time-transgressive glacial maxima positions of the last Scandinavian Ice Sheet

Stratigraphy of the Koivusaarenneva exposure and its correlation across central Ostrobothnia, Finland

Limited extension of the MIS 2 proglacial lake in the Severnaya Dvina valley, south‐eastern margin of the last Scandinavian Ice Sheet

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