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SUMMARY:CANCELLED DUE TO STRIKE ACTION Concentrated\, “pulsed” axial g
 lacier flow: structural glaciological evidence from Kvíárjökull in SE I
 celand - Emrys Phillips\, British Geological Survey\, Edinburgh
DTSTART:20180228T163000Z
DTEND:20180228T173000Z
UID:TALK99172@talks.cam.ac.uk
CONTACT:Ian Willis
DESCRIPTION:A detailed structural glaciological study carried out on Kví
 árjökull in SE Iceland reveals that recent flow within this maritime gla
 cier is concentrated within a narrow corridor located along its central ax
 is. This active corridor is responsible for feeding ice from the accumulat
 ion zone on the south-eastern side of Öræfajökull to the lower reaches 
 of the glacier and resulted in a c. 200 m advance during the winter of 201
 3-14 and the formation of a push-moraine. The corridor comprises a series 
 of lobes linked by a laterally continuous zone of highly fractured ice cha
 racterised by prominent flow-parallel crevasses\, separated by shear zones
 . The lobes form highly crevassed topographic highs on the glacier surface
  and occur immediately down-ice of marked constrictions caused by prominen
 t bedrock outcrops located on the northern side of the glacier. Close to t
 he frontal margin of Kvíárjökull\, the southern side of the glacier is 
 relatively smooth and pock-marked by a number of large moulins. The bounda
 ry between this slow moving ice and the active corridor is marked by a num
 ber of ice flow-parallel strike-slip faults and a prominent dextral shear 
 zone which resulted in the clockwise rotation and dissection of an ice-cor
 ed esker exposed on the glacier surface. It is suggested that this concent
 rated style of glacier flow identified within Kvíárjökull has affinitie
 s with the individual flow units which operate within pulsing or surging g
 laciers.
LOCATION:Ramsden Room\, St Catharine's College
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