Periglacial geomorphology of summit tors on Bodmin Moor, Cornwall, SW England

Abstract

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Periglacial environments and frozen ground in the central Pyrenean high mountain area: Ground thermal regime and distribution of landforms and processes

“…Graphical representation is based on the symbols and colors assigned to each morphogenetic system, although only periglacial processes and landforms are used as indicators on the maps of frozen ground. The landforms used as indicators of frozen ground were rock glaciers, protalus lobes, debris lobes, frost mounds and patterned ground, all characteristic of periglacial landscapes . A periglacial system can be defined as the set of processes, landforms and sediments associated with changes in water status and frozen ground in polar, upland or periglacial mountain environments, the last of which can divided into altitudinal belts. Ground temperatures (GTS) .…”

“…The landforms used as indicators of frozen ground were rock glaciers, protalus lobes, debris lobes, frost mounds and patterned ground, all characteristic of periglacial landscapes . A periglacial system can be defined as the set of processes, landforms and sediments associated with changes in water status and frozen ground in polar, upland or periglacial mountain environments, the last of which can divided into altitudinal belts. Ground temperatures (GTS) . The ground thermal regime was monitored between 2010 and 2016 by means of 37 continuous dataloggers (Ibuttons DS1922L and DS1921G) distributed between 2,250 and 3,070 m a.s.l.…”

Mapping the potential distribution of frozen ground in Tucarroya (Monte Perdido Massif, the Pyrenees)

“…The geomorphological map of this paper shows periglacial landforms mapped in the field by the aid of colour orthorectified images corresponding to sheet 146-4 of the Spanish topographic map (1:25,000) (fot-06-5944, 5945, 5946, 5947) (PNOA, 2015). Besides, this type of mapping can be combined with information of periglacial thermal processes to define landsystems (Evans et al 2017). The altitudinal thermal classification of landforms (González-García, 2013;Serrano et al, 2019) permits us to considerate as permafrost or SFG indicators four of the mapped landforms (Table 1).…”

Automated mapping of relict patterned ground: An approach to evaluate morphologically subdued landforms using unmanned-aerial-vehicle and structure-from-motion technologies

“…Those identified include gelifluction deposits, altiplanation terraces, block-fields and patterned ground (Te Punga, 1956;Palmer and Nielsen 1962;Waters, 1964;Gerrard, 1988;Bennett et al, 1996;Evans et al, 2012a). Dartmoor are alleged to be less developed in comparison to those found in surrounding areas (Evans et al, 2017), although more rigorous regional mapping is required to verify this. It is surprising, therefore, that despite the established and emerging research regarding the nature and distribution of periglaciation in the uplands of SW England, systematic mapping of the features found across extensive areas of Dartmoor has hitherto not been undertaken (Evans et al 2017).…”