Drifts, Meltwater Channels and Ice-Margins in the Lincolnshire Wolds

Straw, Allan

doi:10.2307/621247

Cited by 8 publications

(6 citation statements)

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“…(), Smith (), Smith (), Smith & Francis (), Smith & Kimbell (), Stoker (), Stoker et al . (, , b, ), Straw (, , , ), Sugden (), Sugden et al . (), Sugden & Clapperton (), Sutherland (, ), Sutherland et al .…”

Section: References For Britice Glacial Map V2unclassified

BRITICE Glacial Map, version 2: a map and GIS database of glacial landforms of the last British–Irish Ice Sheet

Clark

Ely

Greenwood

et al. 2017

Boreas

123

118

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During the last glaciation, most of the British Isles and the surrounding continental shelf were covered by the BritishIrish Ice Sheet (BIIS). An earlier compilation from the existing literature (BRITICE version 1) assembled the relevant glacial geomorphological evidence into a freely available GIS geodatabase and map (Clark et al. 2004: Boreas 33, 359). New high-resolution digital elevation models, of the land and seabed, have become available casting the glacial landform record of the British Isles in a new light and highlighting the shortcomings of the V.1 BRITICE compilation. Here we present awholesale revision of the evidence, onshore and offshore, to produce BRITICE version 2, which now also includes Ireland. All published geomorphological evidence pertinent to the behaviour of the ice sheet is included, up to the census date of December 2015. The revised GIS database contains over 170 000 geospatially referenced and attributed elements -an eightfold increase in information from the previous version. The compiled data include: drumlins, ribbed moraine, crag-and-tails, mega-scale glacial lineations, glacially streamlined bedrock (grooves, roches moutonn ees, whalebacks), glacial erratics, eskers, meltwater channels (subglacial, lateral, proglacial and tunnel valleys), moraines, trimlines, cirques, trough-mouth fans and evidence defining ice-dammed lakes. The increased volume of features necessitates different map/database products with varying levels of data generalization, namely: (i) an unfiltered GIS database containing all mapping; (ii) a filtered GIS database, resolving data conflicts and with edits to improve geo-locational accuracy (available as GIS data and PDF maps); and (iii) a cartographically generalized map to provide an overviewof the distribution and types of features at the ice-sheet scale that can be printed at A0 paper size at a 1:1 250 000 scale. All GIS data, the maps (as PDFs) and a bibliography of all published sources are available for download from: https://www.sheffield.ac.uk/geography/staff/clark_chris/britice. Palaeo-ice sheets provide the opportunity to study icesheet behaviour over a longer time period (10 000s of years) than can be achieved by studying current ice sheets (10s of years) thereby permitting exploration of the long-term role of ice sheets in the climate system. The extent, geometry and dynamics of palaeo-ice sheets can be reconstructed from the geomorphological and geological evidence they leave behind, with the mapping, logging and description of such evidence being the vital ingredients. For many palaeo-ice sheets, such as the British-Irish Ice Sheet (BIIS), the accumulation of evidence at individual field-sites has been ongoing for well over 100 years (e.g. Geikie 1894) yielding thousands of publications. Using such work to build local to regional reconstructions of ice dynamics is feasible, but at the ice-sheet scale the volume of information becomes unmanageable. Often the information is spread across so many publications and across many decades of work, where...

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Section: References For Britice Glacial Map V2unclassified

BRITICE Glacial Map, version 2: a map and GIS database of glacial landforms of the last British–Irish Ice Sheet

Clark

Ely

Greenwood

et al. 2017

Boreas

123

118

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“…Laminated sediments in the Humberhead area ("25 foot drift") record a lower Lake Humber level of 15 m (Lake Humber II; Straw, 1979), at which time no Lake Fenland existed, indicating that The Wash was not closed off by ice. In north Lincolnshire Lake Humber II was associated with the extensive Killingholme-Hogsthorpe Moraine and the Upper Marsh Till (extending up to 80 m in the central Lincolnshire Wolds) by Straw (1961Straw ( , 1969Straw ( , 1979, who suggested that this assemblage of sediments and landforms represented a late Devensian "readvance" (essentially the Late Devensian maximum). Gravels west of the Killingholme Moraine are therefore the same age as Lake Humber II (Straw, 1979).…”

Section: North East and Eastern Englandmentioning

confidence: 99%

“…On the central Lincolnshire Wolds, a drift limit, marked by the edge of the "Lower Marsh Till", occurs at 114 m and has been equated with an Early Devensian glaciation by Straw (1957Straw ( , 1958Straw ( , 1961Straw ( , 1979. However, this Early Devensian age is refuted by Madgett and Catt (1978) based upon intensive studies on all the tills of Holderness and Lincolnshire.…”

Section: Eastern Englandmentioning

confidence: 99%

The last British Ice Sheet: A review of the evidence utilised in the compilation of the Glacial Map of Britain

Evans

Clark

Mitchell

2005

Earth-Science Reviews

126

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This paper reviews the evidence presently available (as at December 2003) in an effort to stimulate further research on the last British Ice Sheet and promote a reconstruction of ice sheet behaviour based on glacial geology and geomorphology. The wide range of evidence that has been scrutinized for inclusion on the glacial map is assessed with respect to the variability of its quality and quantity and the existing controversies in ice sheet reconstructions. Landforms interpreted as being of unequivocal ice-marginal origin (moraines, ice-contact glacifluvial landforms and lateral meltwater channels) and till sheet margins are used in conjunction with available chronological control to locate former glacier and ice-sheet margins throughout the last glacial cycle. Subglacial landforms (drumlins, flutings and eskers) have been used to demarcate former flow patterns within the ice sheet. The compilation of evidence in a regional map is crucial to any future reconstructions of palaeo-ice sheet dynamics and will provide a clearer understanding of ice sheet configuration, ice divide migration and ice thickness and coverage for the British Ice Sheet as it evolved through the last glacial cycle.2

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“…The sedimentary and stratigraphic record of the recession of the North Sea Lobe of the British-Irish Ice Sheet (BIIS) is best documented along the coast of eastern England, specifically in the tills and associated glacilacustrine deposits of Holderness (Catt, 1991(Catt, , 2007Evans et al, 1995;Boston et al, 2010;Evans and Thomson, 2010) and the Humber Estuary and North Lincolnshire (Straw, 1961(Straw, , 1979Gaunt, 1981;Bateman et al, 2008Bateman et al, , 2015. The style of North Sea Lobe recession, based largely upon these onshore landformsediment assemblages, has been hypothesized by Clark et al (2012) based upon a restricted number of chronostratigraphic control points.…”

Section: Introduction To Glacial Lake Pickeringmentioning

confidence: 99%

Glacial Lake Pickering: stratigraphy and chronology of a proglacial lake dammed by the North Sea Lobe of the British–Irish Ice Sheet

Evans

Bateman

Roberts

et al. 2016

J Quaternary Science

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We report the first chronology, using four new optically stimulated luminescence dates, on the sedimentary record of Glacial Lake Pickering, dammed by the North Sea Lobe of the British-Irish Ice Sheet during the Dimlington Stadial (24-11 ka cal BP). Dates range from 17.6 AE 1.0 to 15.8AE 0.9 ka for the sedimentation of the Sherburn Sands at East Heslerton, which were formed by multiple coalescing alluvial fans prograding into the falling water levels of the lake and fed by progressively larger volumes of debris from the Wolds. Fan formation ceased $15.8 ka, at a time when permafrost was degrading and nival-fed streams were no longer capable of supplying sediment to the fans. A further age of 10.1 AE 0.7 ka dates the reworking of coversand into the early part of the Holocene, immediately post-dating Younger Dryas periglacial structures. A 45-m lake level dates to $17.6 ka, when the North Sea Lobe was already in retreat, having moved eastward of the Wykeham Moraine; it stood further east at the Flamborough Moraine by $17.3 ka. The highest (70 m) lake level and the occupation of the Wykeham Moraine date to an earlier phase of the North Sea Lobe occupation of the Vale of Pickering. #

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Drifts, Meltwater Channels and Ice-Margins in the Lincolnshire Wolds

Cited by 8 publications

References 0 publications

BRITICE Glacial Map, version 2: a map and GIS database of glacial landforms of the last British–Irish Ice Sheet

BRITICE Glacial Map, version 2: a map and GIS database of glacial landforms of the last British–Irish Ice Sheet

The last British Ice Sheet: A review of the evidence utilised in the compilation of the Glacial Map of Britain

Glacial Lake Pickering: stratigraphy and chronology of a proglacial lake dammed by the North Sea Lobe of the British–Irish Ice Sheet

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