Sedimentological record of subglacial conditions and ice sheet dynamics of the Vistula Ice Stream (north-central Poland) during the Last Glaciation

Narloch, Włodzimierz; Wysota, Wojciech; Piotrowski, Jan A.

doi:10.1016/j.sedgeo.2013.05.001

Cited by 34 publications

(26 citation statements)

References 75 publications

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“…How ever, the drop of the pore-wa ter pres sure af ter an ep i sode of drain age was prob a bly much larger than in the case of the till with few de for ma tions and with traces of subglacial wa ter flows at the ice-bed con tact. This in di cates that a de for ma tion till can ar chive the cy cles of changes in strain rate, in clud ing their di min ish ing, ceas ing and re ac ti va tion (see Boulton et al, 2001;Larsen et al, 2004;Piotrowski et al, 2004;Narloch et al, 2012Narloch et al, , 2013. This con clusion is con sis tent with the ob ser va tions of some mod ern glaciers, which in di cate tem po ral vari a tions of the basal move ment type: from subglacial de for ma tion to basal slid ing as a re sult of changes in the basal wa ter pres sure (Blake et al, 1992(Blake et al, , 1994Fischer and Clarke, 1994Iverson et al, 1994Iverson et al, , 1995Hooke et al, 1997;Fischer et al, 1999;Hart et al, 2009).…”

Section: Discussion Subglacial Conditions and Mechanisms Of Ice Sheetmentioning

confidence: 83%

“…In a later model, soft subglacial beds were pre sented as a mo saic of de form ing and sta ble spots; the in ten sity of de for ma tion var ied in both time and space . Con cepts of spa tially var ied glacier bed char ac ter is tics have been de scribed also by other authors (see Knight, 2002;Van der Meer et al, 2003;Larsen et al, , 2007Stokes et al, 2007;Narloch et al, 2012Narloch et al, , 2013Tylmann et al, 2013). The dif fer ences in as sess ment of the role and scale of subglacial de for ma tion are largely due to the dif ferent rhe o log i cal mod els for the be hav ior of basal till, i.e.…”

Section: Introductionmentioning

confidence: 72%

“…Its oc cur rence at the ice sheet mar gin may have sig nif icantly af fected the basal wa ter pres sure through a pos si bly signif i cant re duc tion of ground wa ter out flow from thin subsurface aqui fer ho ri zons onto the area in front of the ice sheet (see Piotrowski, 1997;Clay ton et al, 1999;Cut ler et al, 2000;Waller et al, 2009;Wysota et al, 2009;Narloch et al, 2013;Szuman et al, 2013). A sin gle wedge struc ture, which could in di cate the pres ence of per ma frost be fore the ice sheet ad vanced, was pres ent in the gravel un der the till at the G³ogówek site.…”

Section: The Influence Of the Substratum's Lithology On The Lobe Devementioning

confidence: 99%

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Basal till and subglacial conditions at the base of the Upper Odra ice lobe (southern Poland) during the Odranian (Saalian) Glaciation

Salamon

2014

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Salamon, T., 2014. Basal till and subglacial con di tions at the base of the Up per Odra ice lobe (south ern Po land) dur ing the Odranian (Saalian) Gla ci ation. Geo log i cal Quar terly, 58 (4): 779-794, doi: 10.7306/gq.1176The ob jec tive of this con tri bu tion is de tail char ac ter is tics of the basal till and the con di tions at the base of the Up per Odra ice lobe. The lobe was formed in a foremountain area. Its cen tral part was a Niemodlin Plain and the W part of the Racibórz Basin, sur rounded by ar eas that have a much more var ied re lief. Par tic u lar at ten tion is paid to the con di tions at the ice sheet base, gen er at ing the dy nam ics of gla cier move ment. The study is based on anal y sis of the basal till. Three sites with basal till ly ing on dif fer ent types of sub stra tum (typ i cal for the study area) are pre sented. The basal till of the Up per Odra ice lobe is char ac ter ized by spa tial vari a tions. Dif fer ent in ten si ties of its de for ma tion in di cate that large lat eral dif fer ences in con di tions oc curred in the lobe sub stra tum. The li thol ogy con trolled the rate of basal wa ter pres sure, and thus the strength of both the subglacial sed i ments and the ice-bed cou pling. Var i ous strain rates in the till pro files in di cate that the con di tions at the ice sheet base also changed with time. The ice sheet was highly mo bile, even on the coarse-grained sub stra tum. The low perme abil ity of the Qua ter nary sub stra tum, and the rel a tively small thick ness of the Qua ter nary sands and grav els re sulted in a high wa ter pres sure at the ice sheet base. The move ment of the Up per Odra ice lobe was con cen trated in the basal zone of the ice sheet. The main mech a nisms of mo tion were slid ing and de for ma tion of the subglacial sed i ments. The de for ma tion oc curred in re stricted ar eas only, and did not have a per va sive char ac ter.

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Section: Discussion Subglacial Conditions and Mechanisms Of Ice Sheetmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 72%

Section: The Influence Of the Substratum's Lithology On The Lobe Devementioning

confidence: 99%

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Basal till and subglacial conditions at the base of the Upper Odra ice lobe (southern Poland) during the Odranian (Saalian) Glaciation

Salamon

2014

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“…Mech a nisms of de vel op ment and evolu tion of ice sheet lobes in the Eu ro pean Low land and North Amer ica dur ing the Pleis to cene have been broadly dis cussed by many re search ers over the last de cades (Ev ans and Rea, 2005;Boulton and Hagdorn, 2006;Jennings, 2006;Narloch et al, 2013). The mor pho log i cal axis of the de vel op ing lobes are, e.g., de pres sions/old val leys ex ist ing in the land scape, on which the ice sheet ad vanced (Mickelson and Colagan, 2004;Wysota and Molewski, 2011;Dzieduszyñska et al, 2014;Herma no wski, 2015).…”

Section: Discussionmentioning

confidence: 99%

Postglacial morpholineaments as an indicator of ice sheet dynamics during the Saale Glaciation in the Białystok Plateau and Sokółka Hills (NE Poland)

Rychel

Morawski²

2017

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1 Pol ish Geo log i cal In sti tute -Na tional Re search In sti tute, Rakowiecka 4, 00-975 Warszawa, Po land 2 l'immeuble SarSaara Lot 124B-2 Yoff Toundoup Rya, Dakar, Sen e gal Rychel, J., Morawski, M., 2017. Postglacial morpholineaments as an in di ca tor of ice sheet dy nam ics dur ing the Saale Gla ciation in the Bia³ystok Pla teau and Sokó³ka Hills (NE Po land). Geo log i cal Quar terly, 61 (2): 334-349, doi: 10.7306/gq.1352The palaeo geo graphi cal re con struc tion of the deglaciation pro cess in NE Po land dur ing the Odranian Gla ci ation Wartanian Stadial (Saale MIS 6) is based mainly on the anal y sis of gla cial morpholineaments, per formed us ing the GIS pro grams that pro vide us with better un der stand ing of the gla cial land scape evo lu tion, spa tial re con struc tion of gla cial pro cesses, and postglacial land scape de vel op ment. Anal y sis of postglacial morpholineaments was car ried out based on the Dig i tal El e vation Model (DEM) as well as geo log i cal, geomorphological and top o graphic maps. It re sulted in the de lim i ta tion of vis i ble linear postglacial land forms, their iden ti fi ca tion and clas si fi ca tion, and the de ter mi na tion of their ge netic and chro no log i cal re la tions. Di rec tions of the lin ea ments were de ter mined through quan ti ta tive anal y sis. Qual i ta tive anal y sis was ap plied to deter mine the spa tial and tem po ral se quence of events, di rec tions of ice move ment and its range. Two gla cial lobes, Biebrza and Neman, ex isted in the north-west ern part of the Bia³ystok Pla teau and Sokó³ka Hills dur ing the last gla cial ad vance. The lobed na ture of the ice sheet can be con firmed by field data col lected from, e.g., sites in Knyszewicze, and by top o graphic anal y sis of Qua ter nary sed i ments, com bined with their thick ness and gen e sis. The ob tained re con struc tion of the last gla cial ad vance and re treat in the study area can be used in fur ther re gional dis cus sions on the char ac ter and dy nam ics of the last gla ci ation in this re gion.

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“…This is supported by, amongst other data, evidence of ice-bed decoupling and of subglacial flows and the limited thickness of the deformation layer in sediments underlying the till. The lower subunit can be associated with the impact of the Vistula palaeo-ice stream (compare Boulton et al, 2001;Narloch et al, 2012Narloch et al, , 2013. The upper subunit was deposited probably by ice that was not associated with this palaeo-ice stream; the ice advanced from a different direction and probably more slowly.…”

Section: Discussionmentioning

confidence: 99%

Unravelling the complex nature of the Upper Weichselian till section at Gdynia Babie Doły, northern Poland

Woźniak

Czubla

2016

Geologos

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The complexity of glacial sequences may increase when these formed underneath ice sheets despite subsequent changes in their extent that are accompanied by alterations in the direction of the ice flow. Our aim was to determine whether or not changes in ice sheet dynamics during the Late Weichselian are also recorded in sediments formed north of the area of its fluctuating margin (i.e., where the ice sheet prevailed independent of such fluctuations). It is shown that in these areas such a record could have occurred, as documented by results of till studies at Babie Doły. The examination was carried out using several analyses: lithofacies properties of sediments, petrographic till composition (fine gravel fraction, indicator erratics), till matrix CaCO3content, till fabric, as well as orientation of striae on the top surfaces of large clasts. In parallel, datings of sub- and supra-till sediments using the TL method were carried out. The basal till at Babie Doły represents almost the entire Upper Weichselian, but it can be divided into subunits whose features indicate different ice flow directions and debris supply. The lower subunit developed as a result of the palaeo-ice stream along the main axis of the Baltic Sea (from the north), expanding to areas adjacent to the depression of the Gulf of Gdańsk. The upper subunit developed when the influence of the palaeo-ice stream in the study area decreased, the main role having been taken over by the ice flowing from the northwest. The till analysed also shows considerable lateral variation, indicative of the mosaic nature of subglacial sedimentation. We consider the diversity of permeability of deposits over which the ice sheet extended to be the prime factor that determined such a situation.

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Sedimentological record of subglacial conditions and ice sheet dynamics of the Vistula Ice Stream (north-central Poland) during the Last Glaciation

Cited by 34 publications

References 75 publications

Basal till and subglacial conditions at the base of the Upper Odra ice lobe (southern Poland) during the Odranian (Saalian) Glaciation

Basal till and subglacial conditions at the base of the Upper Odra ice lobe (southern Poland) during the Odranian (Saalian) Glaciation

Postglacial morpholineaments as an indicator of ice sheet dynamics during the Saale Glaciation in the Białystok Plateau and Sokółka Hills (NE Poland)

Unravelling the complex nature of the Upper Weichselian till section at Gdynia Babie Doły, northern Poland

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