The sedimentary and structural evolution of a recent push moraine complex: Holmströmbreen, Spitsbergen

Boulton, Geoffrey; Meer, J.J.M. van der; Beets, D.J.; Hart, Jane K.; Ruegg, G.H.J.

doi:10.1016/s1571-0866(04)80103-9

Cited by 38 publications

(89 citation statements)

References 20 publications

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“…Terminal moraines are an important landform within the glacial landsystem and are widely recognised within both contemporary (Boulton et al, 1996(Boulton et al, , 1999Bennett, 2001; Evans and Twigg, 2002; Evans, 2005;Benediktsson et al, 2010) and relict glacial environments (van der Meer, 1987; Lee, J.R., Phillips, E., Booth, S.J., Rose, J., Jordan, H.M., Pawley, S.M., Warren, M., Lawley, R.S. 2013.…”

Section: Introductionmentioning

confidence: 99%

“…At a smaller scale, they can provide specific information regarding the mechanics of ice-marginal events, submarginal conditions and the ice-bed interaction. Several recent studies have suggested that terminal moraines may record evidence of surging glacier flow (Matthews et al, 1995;Krüger, 1996;Boulton et al, 1999;Bennett, 2001;Evans and Hiemstra, 2005;Benediktsson et al, 2009Benediktsson et al, , 2010, or alternatively, substrate conditions leading to the termination of fast flow conditions (Christoffersen and Tulaczyk, 2003). Consequently, terminal moraines can provide valuable insights into the dynamics and nature of the ice-marginal landsystem, and potentially the internal and external controls that influenced glacier/ice sheet behaviour (Bennett, 2001;Benn and Evans, 2010).…”

Section: Introductionmentioning

confidence: 99%

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A polyphase glacitectonic model for ice-marginal retreat and terminal moraine development: the Middle Pleistocene British Ice Sheet, northern Norfolk, UK

Lee

Phillips

Booth

et al. 2013

Proceedings of the Geologists' Association

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Recent investigations from modern environments demonstrate that many terminal moraines do not simply record a single glacial maximum, but instead reveal a complex pattern of ice-marginal behaviour including polyphase retreat. Within this study, we examine the geomorphology, geology and internal structure of a terminal moraine complex -the 'Cromer Ridge' in north Norfolk to reconstruct patterns of ice-marginal behaviour. Previously, this landform was interpreted as the limit of a southern extension of the British Ice Sheet during a Middle Pleistocene glaciation. Evidence presented here reveals a more complicated pattern of ice-marginal behaviour with the 'Cromer Ridge' reinterpreted as a 'complex' comprising several ridge elements. We propose that the maximum ice extent lay further to the south, with the size and morphology of the largest ridge element (the 'Cromer Ridge' as previously defined) a facet of thrust-stacking at an ice-marginal stillstand. We recognise multiple oscillations of the ice-front recorded against a twelve-stage model for the decay of the southern margins of a fast-flowing lobe of North Sea ice. Changes in ice-marginal dynamics are identified by the superimposition and lateral and vertical evolution of glacitectonic styles. Differences between these various states, and switches between 'shallow' and 'deep' thinskinned glacitectonics, are strongly influenced by sub-marginal and proglacial water availability. Examination of the evidence for the morphostratigraphic proposals for the glacitectonic assemblage, within the context of the above interpretation, suggests that many of the 'glacigenic landforms' are erosional and a MIS 12 age of formation is favored although several anomalies remain to be explained. IntroductionTerminal moraines are an important landform within the glacial landsystem and are widely recognised within both contemporary (Boulton et al., 1996(Boulton et al., , 1999Bennett, 2001; Evans and Twigg, 2002; Evans, 2005;Benediktsson et al., 2010) and relict glacial environments (van der Meer, 1987; Lee, J.R., Phillips, E., Booth, S.J., Rose, J., Jordan, H.M., Pawley, S.M., Warren, M., Lawley, R.S. 2013. A polyphase glacitectonic model for ice-marginal retreat and terminal moraine development: the Middle Pleistocene British Ice Sheet, northern Norfolk, UK. Proceedings of the Geologists' Association, 124, 753-777. PRE-PROOF ACCEPTEF MANUSCRIPT.2 Hart, 1990;Van der Wateren, 1995;Harris et al., 1997;Phillips et al., 2002;Wilson, 2002;Thomas and Chiverrell, 2007;Johnson et al., 2013). Previously, they have been considered as providing a visible record of a maximum extent of glacier advance, although many now consider them to provide a more dynamic record of glacier retreat (e.g. Thomas, 1984;Thomas et al., 2004;Thomas and Chiverrell, 2007;Lüthgens and Böse, 2011; Clark et al., 2012).The formation of terminal moraines typically involves the complex interplay between ice-marginal to sub-marginal sedimentation and glacitectonics; the latter including proglacial and sub-margina...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A polyphase glacitectonic model for ice-marginal retreat and terminal moraine development: the Middle Pleistocene British Ice Sheet, northern Norfolk, UK

Lee

Phillips

Booth

et al. 2013

Proceedings of the Geologists' Association

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“…The combination of composite ridges and ice-cored moraines, observed at Stage 2 deposits fronting the North Glacier, often indicate glacial deformation of permafrozen material on Svalbard (Boulton, Van der Meer, Beets, Hart, & Ruegg, 1999;Etzelmüller & Hagen, 2005). Based on this landsystem signature, we infer erosive polythermal basal conditions for the North Glacier with temperate ice and a frozen snout as described for Spitsbergen glaciers (e.g.…”

Section: Discussionmentioning

confidence: 64%

Mapping sediment–landform assemblages to constrain lacustrine sedimentation in a glacier-fed lake catchment in northwest Spitsbergen

2015

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Changes in the deposition of fine-grained rock-flour in glacier-fed lakes reflect glacier variability. This meltwater-driven signal is, however, often overprinted by other processes. To constrain the signature of lacustrine sedimentation, we mapped the catchment of glacier-fed Lake Hajeren in northwest Spitsbergen, identifying sediment sources and linking them to surface processes. To this end, we employed a combined approach of aerial image interpretation and field mapping. Our map comprises sediment-landform assemblages commonly found in pro-, peri-and paraglacial landsystems on Spitsbergen, including weathered moraines outboard Little Ice Age limits. Based on the presented map, we argue that mass-wasting does not directly impact lake sedimentation. Also, due to the scarcity of fines in historical glacial deposits, we suggest that modified glacigenic sediments only briefly affect a recorded glacier signal, following retreat. These findings highlight the value of geomorphological maps as tools to constrain catchment processes, improving the interpretation of lake sediment records. ARTICLE HISTORY

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“…On the basis of their morphology, distribution, and setting, the curvilinear features are interpreted as end moraines associated with ice flow from the Welsh Ice Cap. Their arcuate, steep-crested, asymmetrical, and sometimes sinuous form is typical of contemporary glaciotectonic push moraines that develop during a period of positive mass balance or glacier surge (Boulton, 1986;Boulton et al, 1999;Bennett, 2001;Ottesen and Dowdeswell, 2006;Bennett and Glasser, 2009), and have been previously described in a number of other submarine environments (e.g. Ottesen and Dowdeswell, 2006;Ottesen et al, 2007;Nygård et al, 2008).…”

Section: Moraines: (A)mentioning

confidence: 89%

Rapid marine deglaciation: asynchronous retreat dynamics between the Irish Sea Ice Stream and terrestrial outlet glaciers

et al. 2013

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Abstract. Understanding the retreat behaviour of past marine-based ice sheets provides vital context for accurate assessments of the present stability and long-term response of contemporary polar ice sheets to climate and oceanic warming. Here new multibeam swath bathymetry data and sedimentological analysis are combined with high resolution ice-sheet modelling to reveal complex landform assemblages and process dynamics associated with deglaciation of the Celtic ice sheet within the Irish Sea Basin. Our reconstruction indicates a nonlinear relationship between the rapidly receding Irish Sea Ice Stream and the retreat of outlet glaciers draining the adjacent, terrestrially based ice cap centred over Wales. Retreat of Welsh ice was episodic; superimposed over low-order oscillations of its margin are asynchronous outlet readvances driven by catchment-wide mass balance variations that are amplified through migration of the ice cap's main ice divide. Formation of large, linear ridges which extend at least 12.5 km offshore (locally known as sarns) and which dominate the regional bathymetry are attributed to repeated frontal and medial morainic deposition associated with the readvancing phases of these outlet glaciers. Our study provides new insight into ice-sheet extent, dynamics and non-linear retreat across a major palaeo-ice stream confluence zone, and has ramifications for the interpretation of recent fluctuations observed by satellites over short timescales across marine sectors of the Greenland and Antarctic ice sheets.

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The sedimentary and structural evolution of a recent push moraine complex: Holmströmbreen, Spitsbergen

Cited by 38 publications

References 20 publications

A polyphase glacitectonic model for ice-marginal retreat and terminal moraine development: the Middle Pleistocene British Ice Sheet, northern Norfolk, UK

A polyphase glacitectonic model for ice-marginal retreat and terminal moraine development: the Middle Pleistocene British Ice Sheet, northern Norfolk, UK

Mapping sediment–landform assemblages to constrain lacustrine sedimentation in a glacier-fed lake catchment in northwest Spitsbergen

Rapid marine deglaciation: asynchronous retreat dynamics between the Irish Sea Ice Stream and terrestrial outlet glaciers

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