The Perth re‐advance in Central Scotland, Part II

Sissons, J. B.

doi:10.1080/00369226408735917

Cited by 15 publications

(13 citation statements)

References 24 publications

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“…17D). It is noteworthy that the ice limits during our Stage D (and stage 3 of Paterson et al, 1998) are consistent with the ice sheet configuration in central Scotland suggested by Sissons (1963Sissons ( , 1964Sissons ( , 1967b during the hypothesised 'Perth Readvance'. All require the presence of a large ice mass over the Firth of Clyde during deglaciation.…”

Section: Towards a Regional Synthesissupporting

confidence: 65%

“…The configuration is roughly that originally proposed for the 'Perth Readvance' in central Scotland (Sissons, 1963(Sissons, , 1964(Sissons, , 1967b. Of note is the limited bedform development from this stage, with only a small patch of Group IV bedforms occurring in the east.…”

Section: Late Devensian Glaciation; Stage Dmentioning

confidence: 99%

“…They descend eastwards from about 305 to 260m a.s.l. and were described by Sissons (1963Sissons ( , 1964Sissons ( , 1967a as part of his more widespread evidence for the supposed 'Perth Readvance' (Simpson, 1933). (Fig.…”

Section: Moraine Ridge Complexesmentioning

confidence: 99%

“…Interpretations conflict owing to the isolated nature of individual studies, and uncertainty remains over whether events identified in the geological record were local phenomena resulting from internal glacier readjustments, or ice sheet-wide events controlled by climatic response (e.g. Sissons, 1964Sissons, , 1976Paterson, 1974;McCabe et al, 2007b;Peacock et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Ice sheet advance, dynamics, and decay configurations: evidence from west central Scotland

Finlayson

Merritt

Browne

et al. 2010

Quaternary Science Reviews

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Section: Towards a Regional Synthesissupporting

confidence: 65%

Section: Late Devensian Glaciation; Stage Dmentioning

confidence: 99%

Section: Moraine Ridge Complexesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ice sheet advance, dynamics, and decay configurations: evidence from west central Scotland

Finlayson

Merritt

Browne

et al. 2010

Quaternary Science Reviews

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“…Dyke, 1993). The Perth Readvance was proposed by Simpson (1933) and supported by Sissons (1963aSissons ( , 1964Sissons ( , 1967b based upon the distribution of ice-marginal depositional complexes, particularly glacifluvial landform assemblages, and their association with raised shorelines. Although the Perth Readvance was later rejected by Paterson (1974) and even by Sissons (1974aSissons ( ,b, 1976aSissons ( , 1981 himself, account needs to be taken of the glacifluvial landform assemblages originally used in its identification.…”

Section: Northern and Central Scotlandmentioning

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

127

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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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Evidence for Heinrich event 1 in the British Isles

McCabe¹,

Knight²,

McCarron³

1998

J. Quaternary Sci.

138

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In the north Irish Sea basin (ISB), sedimentary successions constrained by AMS 14 C dates obtained from marine microfaunas record three major palaeoenvironmental shifts during the last deglacial cycle. (i) Marine muds (Cooley Point Interstadial) dated to between 16.7 and 14.7 14 C kyr BP record a major deglaciation of the ISB following the Late Glacial Maximum (LGM). (ii) Terminal outwash and ice-contact landforms (Killard Point Stadial) were deposited during an extensive ice readvance, which occurred after 14.7 14 C kyr BP and reached a maximum extent at ca.14 14 C kyr BP. At this time the lowlands surrounding the north ISB were drumlinised. Coeval flowlines reconstructed from these bedforms end at prominent moraines (Killard Point, Bride, St Bees) and indicate contemporaneity of drumlinisation from separate ice dispersal centres, substrate erosion by fast ice flow, and subglacial sediment transfer to ice-sheet margins. In north central Ireland bed reorganisation associated with this fast ice-flow phase involved overprinting and drumlinisation of earlier transverse ridges (Rogen-type moraines) by headward erosion along ice streams that exited through tidewater ice margins. This is the first direct terrestrial evidence that the British Ice Sheet (BIS) participated in Heinrich event 1 (H1). (iii) Regional mud drapes, directly overlying drumlins, record high relative sea-level (RSL) with stagnation zone retreat after 13.7 14 C kyr BP (Rough Island Interstadial). Elsewhere in lowland areas of northern Britain ice-marginal sediments and morainic belts record millennial-scale oscillations of the BIS, which postdate the LGM advance on to the continental shelf, and pre-date the Loch Lomond Stadial (Younger Dryas) advance in the highlands of western Scotland (ca. 11-10 14 C kyr BP). In western, northwestern and northern Ireland, Killard Point Stadial (H1) ice limits are reconstructed from ice-flow lines that are coeval with those in the north ISB and end at prominent moraines. On the Scottish continental shelf possible H1-age ice limits are reconstructed from dated marine muds and associated ice marginal moraines. It is argued that the last major offshore ice expansion from the Scottish mountains postdated ca. 15 14 C kyr BP and is therefore part of the H1 event. In eastern England the stratigraphic significance of the Dimlington silts is re-evaluated because evidence shows that there was only one major ice oscillation postdating ca.18 14 C kyr BP in these lowlands. In a wider context the sequence of deglacial events in the ISB (widespread deglaciation of southern part of the BIS → major readvance during H1 → ice sheet collapse) is similar to records of ice sheet variability from the southern margins of the Laurentide Ice Sheet (LIS). Welldated ice-marginal records, however, show that during the Killard Point readvance the BIS was at its maximum position when retreat of the LIS was well underway. This phasing relationship supports the idea that the BIS readvance was a response to North Atlantic cooling induced by collaps...

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The Perth re‐advance in Central Scotland, Part II

Cited by 15 publications

References 24 publications

Ice sheet advance, dynamics, and decay configurations: evidence from west central Scotland

Ice sheet advance, dynamics, and decay configurations: evidence from west central Scotland

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

Evidence for Heinrich event 1 in the British Isles

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