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Periglacial Processes on Heard island, Southern Indian Ocean


Kiernan, K and McConnell, A, Periglacial Processes on Heard island, Southern Indian Ocean, Papers and Proceedings of the Royal Society of Tasmania, 142, (2) pp. 1-12. ISSN 0080-4703 (2008) [Refereed Article]


Periglacial activity on Heard Island is manifested by intense physical weathering of the longest-exposed surfaces, and hillslope forms by a variety of cold-climate mass-wasting processes. Microrelief features include rudimentary sorted steps, terraces and polygons. No evidence of deep cryoturbation was obtained from excavations at 14 sites in moraines and no landforms indicative of discontinuous permafrost were identified. Periglacial landform development has been inhibited by the maritime climate and is more restricted than on other islands in the region due to the low alitude of the ice-free terrain, limited extent of glacier-free ground, and relatively recent deglaciation

Item Details

Item Type:Refereed Article
Keywords:Periglacial processes; Cryoturbation; Frost action; Sorted polygons; Sorted terraces; Climatic warming
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Geomorphology and earth surface processes
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Kiernan, K (Dr Kevin Kiernan)
UTAS Author:McConnell, A (Ms Anne McConnell)
ID Code:55108
Year Published:2008
Deposited By:Geography and Environmental Studies
Deposited On:2009-03-05
Last Modified:2009-03-19

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