Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.674737
Title: Characteristics and age of rock-slope failures on the western edge of the Antrim plateau
Author: Southall, David Wray
Awarding Body: Ulster University
Current Institution: Ulster University
Date of Award: 2013
Availability of Full Text:
Access through EThOS:
Abstract:
RSFs on the western edge of the Antrim Plateau of the North Atlantic Igneous Province are mapped in detail from a 5m resolution Digital Elevation Model and aerial photos. The maps, digitally produced in ArcMap 9.2, aerial photos and field observations have been combined to describe landform morphology. The digital maps have been used innovatively to obtain the morphometric data of selected landforms representative of the variety of deep-seated and superficial failures that occur and hence to classify them by both their morphology and process of movement. The experimental use of Ground Penetrating Radar, pioneered on rock-slope failure debris in a wet environment, determined the near-surface structure of failure debris and investigated some areas of incipient failures at cliff tops. The age of the failures is assessed from Cosmogenic Nuclide (36CI) Exposure Dating, Radiocarbon Dating and Schmidt Hammer Rebound testing. Long-term deep-seated rotational and translational failures due either paraglacial conditioning or marine erosion or both occurred in oscillating climate phases that spanned the Woodgrange Stadial of the Late Glacial period to the middle of the Littletonian warm period (c. 14.7-5 ka BP). Superficial failures due to periglacial freeze-thaw action on cliff faces occurred in the Nahanagan Stadial, in Littletonian climate reversals (9.3 and 8.2 ka BP), during the Little Ice Age and in cold periods that still exist to the present day.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.674737  DOI: Not available
Share: