IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

Enhanced rock-slope failure following ice-sheet deglaciation : timing and causes

Authors(s) and Affiliation(s)

BALLANTYNE C.K. (1) ; WILSON P. (2) ; GHEORGHIU D. (3) ; RODÉS À (3) ;
(1) School of Geography and Geosciences, Univ., St Andrews, ROYAUME-UNI
(2) School of Environmental Sciences, Univ. of Ulster, Coleraine, ROYAUME-UNI
(3) NERC Cosmogenic Isotope Analysis Facility, SUERC, East Kilbride, ROYAUME-UNI

Abstract

The AA. test competing models through beryllium-10 (10Be) exposure dating of 5 closely-spaced quartzite RSFs on the Isle of Jura, Scotland, to establish the relationship between timing of failure and those of deglaciation, episodes of rapid warming and periods of rapid glacio-isostatic uplift. It is highlighted that debuttressing as an immediate cause of failure is excluded. Thaw of permafrost ice in joints is unlikely to have been a prime trigger of failure as some RSFs occurred several centuries after the onset of interstadial warming. Conversely, the timespan of the RSFs coincides with the period of maximum glacio-isostatic crustal uplift, suggesting that failure was triggered by uplift-driven seismic events acting on fractured rock masses. The AA. conclude about the implications of this and related research

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no7 [pp. 900-913]

Bibliographic references : 3 p.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3495

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681960 : Permanent link - XML version
Powered by Pxxo