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Showing 1 to 20 of 24 for “"periglacial"”.
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Studies of Glacial and Periglacial Environments on Mars
This thesis presents the development and application of a grid-based mapping approach that provides an efficient solution to the problems of mapping small landforms over large areas. The approach allows the cataloguing of landform classes, of multiple sizes, efficiently in a single pass. The speed …
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Periglacial landforms and processes in the southern Kenai Mountains, Alaska
<p>The distribution and characteristics of periglacial landforms in the southern Kenai Mountains, Alaska, were investigated during the summer of 1979. The principal area of study was a 1300-metre high mountain mass which stood as a nunatak during the last general glaciation. Periglacial features in …
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Periglacial Geomorphological Mapping of the Comanche Peak Area . Mummy Range, Larimer County, Colorado
The periglacial study area covers 9 square miles on the Comanche Peak 7.5 minute Quadrangle Larimer County, Colorado. Most of the mapped area lies above tree line in the alpine environment, about 10,400 ft. (3120 m). Krommholz, salix , grasses, sedge, and a variety of wild flowers are the dominant …
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Failure of fractured rock masses in periglacial environments.Experimental investigations on freeze-thaw induced damage.
L'abstract è presente nell'allegato / the abstract is in the attachment
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An investigation of two periglacial landforms on ignimbrite blockslopes in Kluane National Park and Reserve, Yukon Territory
… summer of 2019 to investigate two undocumented periglacial forms identified in satellite imagery. The overall goal of this MSc research is to present and measure these two features spatially, morphologically, and sedimentologically, placing them within the periglacial literature and …
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Characterisation and evolution of periglacial landscapes in Northern Siberia during the Late Quaternary : remote sensing and GIS studies
… modelling techniques for the observation of periglacial landscapes in Northeast Siberia in their present state was evaluated and applied to key sites in the Laptev Sea coastal lowlands. The key sites were situated in the eastern Laptev Sea (Bykovsky Peninsula and Khorogor Valley) and the …
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A Comparison of Relict and Active Terrestrial Patterned Ground as an Analog for Mars
<p>Patterned ground is a ubiquitous landform in periglacial regions of Earth and is also present across the mid to high latitudes of Mars. The association of terrestrial patterned ground to the presence of subsurface water ice in the form of permafrost that develops a seasonal ‘wet’ active layer …
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The glacial and periglacial history of a Middle Pleistocene ice-margin of the British Ice Sheet (BIS) in north Buckinghamshire, England and its influence on geotechnical variability
… of the British Ice Sheet (BIS). Subglacial and periglacial shearing are interpreted to result in an increase in initial void ratio, increase in compressibility with a corresponding reduction in the secant angle of shearing resistance. Chalk-rich tills are stiff, have low compressibility and have …
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PLANT AND ARTHROPOD COMMUNITIES OF ALPINE ICE-RELATED LANDFORMS: ECOLOGICAL AND BIOGEOGRAPHIC IMPORTANCE
… call for studying and monitoring glacial and periglacial habitats – refugia for a cold-adapted and threatened biodiversity - because of the lack of knowledge that still affects these habitats (Gobbi et al. 2021). The study points out the urgency in planning this research due to the risk of …
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Quaternary glaciation in the Pindus Mountains, Northwest Greece
… by small cirque glacier moraines and relict periglacial rock glaciers. evidence for a fourth glacial phase is recorded only in the highest cirques of Mount Smolikas (2637 m a.s.l.), the highest peak in the Pindus Mountains. This phase of glaciation is likely to have occurred during the …
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The Engineering Properties of Glacial Tills in the Taff Valley, South Wales
… during an investigation of the glacial and periglacial soils of the Taff Valley.<br/><br/>The study procedures adopted and the techniques used were chosen from a review of the relatively limited literature relevant to the subject.<br/><br/>Detailed engineering geological and geomorphological …
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The glacial geomorphology of part of the Western Grampians of Scotland, with especial reference to the limits of the Loch Lomond Advance
… the glacial limits the main types of mapped periglacial evidence included frost-riven bedrock, thick fossil screes, smooth debris-strewn slopes, tors, and solifluction lobes, terraces and sheets. 199 mapped trimlines, based on various forms of contrasting glacial and periglacial evidence, …
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Surface boulder concentrations of the Late Wisconsinan Rainy lobe, Minnesota, USA
… them as an erosional lag or resulting from periglacial processes. Characterizations of boulder lithologies, the composition and texture of the underlying till, and mean transport length suggest that this is not the case, and that surface boulder concentrations are primary features of till …
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Vernal Pool Mapping and Geomorphology in the Appalachian Mountains of Pennsylvania
… of parallel ridgelines, and the presence of periglacial related solifluction. Vernal pool distribution is greater than previously known and they occur in predictable settings. Further research should focus on how and where vernal pools form, their impact on water quality, role in forest …
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Impact of permafrost dynamics on Arctic groundwater ow systems with application to the evolution of spring and lake taliks
… used to study di�erent environments; lakes in a periglacial environment, and lakes and springs in a proglacial terrain. Results show that the transient e�ects of heat storage can in uence the present day distribution of permafrost. This is especially pronounced underneath surface water bodies, …
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Quaternary to recent drainage evolution of the Rambla de Lucainena, SE Spain
… of frost weathering. This implies a period of periglacial conditions during the Quaternary. The second event of significance is recorded by a 20 m thick deposit of aggradational fines which indicates a period of increased precipitation and a much wetter climate regime. These observations …
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Virgin hardwood forest soils of western North Carolina
… present day landforms appear to be the result of periglacial activity. North-facing soils were higher in whole soil clay, organic matter, and A horizon exchangeable cations than south-facing soils. Cation exchange capacity in these soils is almost totally dependent on organic matter content, and …
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The late glacial and post glacial history of the Vale of Pickering and northern Yorkshire Wolds
… to their formation. In addition evidence of periglacial evidence from the whole region was collected, described and assessed. Finally it was found that the structural lines of disturbance which traverse the chalk of the northern Wolds could easily be mapped from aerial photographs. These were …
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Geology of the Peaks of Otter area, Bedford and Botetourt counties, Virginia
… by rejuvenated streams. Small ice caps or periglacial conditions may have existed in the Blue Ridge during the Pleistocene causing increased erosion and stream flow which resulted in the deposition or large, fan-shaped sedimentary bodies along the southeastern base of the Blue Ridge …
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