A glacial geomorphological map of the Monadhliath Mountains, Central Scottish Highlands

Boston, Clare M.

doi:10.1080/17445647.2012.743865

Cited by 22 publications

(43 citation statements)

References 29 publications

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“…Using three different approaches to mapping allowed the advantages of each to be combined to produce a detailed and accurate geomorphological map, with robust genetic interpretations. Further details on this approach can be found in Boston (2012a). Sedimentological analysis, following procedures outlined by Evans and Benn (2004), was also used alongside the geomorphological mapping to provide additional information on the processes leading to landform genesis.…”

Section: Methodsmentioning

confidence: 99%

A Younger Dryas plateau icefield in the Monadhliath, Scotland, and implications for regional palaeoclimate

Boston

Lukas

Carr

2015

Quaternary Science Reviews

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136

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a b s t r a c tA record of Younger Dryas glaciation in Scotland is well established. However, the role of the Monadhliath, a significant plateau area extending over 840 km 2 in central Scotland, has never been investigated systematically. We present the first systematic glacial geomorphological mapping across the whole region, which has led to the identification of hitherto-unrecorded glacial and associated landforms. The spatial distribution of these landforms indicates that the last phase of glaciation in the area was that of a local plateau icefield. In addition, a clear morphostratigraphical signature provides a strong indication that the icefield dates to the Younger Dryas (12.9e11.7 ka), which is supported by numerical ages in the southeast of the study area. Based on the geomorphological evidence and 2D glacier surface profile modelling, a 280 km 2 icefield is reconstructed. A novel approach is introduced to quantify plateau icefield thickness for equilibrium line altitude (ELA) and palaeoprecipitation calculations, resulting in greater overall data confidence compared to traditional reconstruction methods. The ELA for the whole icefield is calculated to be 714 ± 25 m, whilst the ELAs of individual outlet glaciers range from 560 m in the west to 816 m in the east, demonstrating a significant WeE precipitation gradient across the region during the Younger Dryas. These ELAs compare well with those calculated for Younger Dryas ice masses reconstructed in neighbouring regions and are in good agreement with overall precipitation patterns suggested for Scotland during this time. Whilst the total amount of precipitation calculated from these ELAs is highly dependent on the method used, irrespective of this, the study suggests a more arid Younger Dryas climate in the region compared to the present day.

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Section: Methodsmentioning

confidence: 99%

A Younger Dryas plateau icefield in the Monadhliath, Scotland, and implications for regional palaeoclimate

Boston

Lukas

Carr

2015

Quaternary Science Reviews

Self Cite

136

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“…Such a combined approach, linking remote sensing data with direct field observations, has been successfully applied for the mapping of glacial landforms in various environmental settings (e.g. Bennett, Evans, Carbonneau, & Twigg, 2010;Boston, 2012;Brown, Evans, & Evans, 2011;Darvill, Stokes, Bentley, & Lovell, 2014;Evans, Ewertowski, & Orton, 2015a, 2015bEvans, Twigg, Rea, & Shand, 2007;Pearce, Rea, Bradwell, & McDougall, 2014). Geomorphic features were digitised using Esri ArcGIS and stored in a file geodatabase.…”

Section: Map Productionmentioning

confidence: 99%

Glacial geomorphology of the terrestrial margins of the tidewater glacier, Nordenskiöldbreen, Svalbard

2016

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A 1:4000 scale map of the terrestrial margins of the foreland of Nordenskiöldbreen depicts a polythermal glacial landsystem containing a record of the landform signatures of individual ice flow units that operate within the glacier snout. A 1:700 map provides a detailed overview of fluted terrain, based on unmanned aerial vehicle images captured in 2014. The pattern of landforms lying inside the Little Ice Age (LIA) latero-frontal moraine on the northern side of the fjord comprises a fluted till surface, which in turn grades into icemoulded bedrock. This signature records the recession of a single, wide ice flow unit, which was characterised by limited incorporation of subglacial material and restricted delivery of supraglacial debris. Inside the latero-frontal moraine on the south side of the fjord, a fluted surface is subordinate to a pronounced and large ice-cored moraine complex related to the confluence of five narrower ice flow units, each of which transported significant quantities of englacial and supraglacial debris at their suture zones as a series of longitudinal debris stripes. The suite of foreland landforms is diagnostic of both temperate subglacial and frozen-snout conditions, indicating the operation of a warm polythermal glacier fed by multiple flow units during the LIA. ARTICLE HISTORY

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“…In the Central Scottish Highlands, a rather different landform assemblage is apparent. The extensive plateau areas of the Gaick and Monadhliath show impressive sequences of meltwater channels, suggesting the significant role of meltwater drainage in the behaviour of these ice masses (Boston, 2012;Sissons, 1974).…”

Section: Discussionmentioning

confidence: 99%

The glacial geomorphology of the Loch Lomond Stadial in Britain: a map and geographic information system resource of published evidence

et al. 2016

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The Loch Lomond Stadial (LLS) was an abrupt period of renewed cooling between 12.9 and 11.7 ka and has long been associated with the regrowth of glaciers in much of upland Britain. Mapping the glacial landforms associated with this period has been undertaken for over a century, but in a non-systematic nature and at specific locations. In this paper, glacial geomorphology associated with the LLS in Britain has been compiled from the published literature into a glacial map and accompanying geographical information system database that is available electronically as supplementary information. A variety of scales have been used to best represent the evidence in the database. Map A is at 1:310 000; B, C, D, E, F, J, L, M and O are at 1:175 000; K, N, P are at 1:100 000 and G, H and I are at 1:50,000. The database contains over 95,000 individual features, which are organised into thematic layers and each attributed to its original citation. The evidence includes moraines, drift and boulder limits, drift benches, periglacial trimlines, meltwater channels, eskers, striations and roches moutonneés, protalus ramparts and ice-dammed lakes. Creation of this database overcomes the drawbacks posed by the non-systematic nature of previous mapping output from studies of LLS glaciation. It is intended to be a catalyst for future research in this area, with especial significance for regional palaeoglaciological and palaeoclimatic reconstructions of the Younger Dryas and numerical modelling. ARTICLE HISTORY

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A glacial geomorphological map of the Monadhliath Mountains, Central Scottish Highlands

Cited by 22 publications

References 29 publications

A Younger Dryas plateau icefield in the Monadhliath, Scotland, and implications for regional palaeoclimate

A Younger Dryas plateau icefield in the Monadhliath, Scotland, and implications for regional palaeoclimate

Glacial geomorphology of the terrestrial margins of the tidewater glacier, Nordenskiöldbreen, Svalbard

The glacial geomorphology of the Loch Lomond Stadial in Britain: a map and geographic information system resource of published evidence

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