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(Article of periodic en Anglais - 2012)

Document title

Progressive failure of sheeted rock slopes : the 2009–2010 Rhombus Wall rock falls in Yosemite Valley, California, USA

Authors(s) and Affiliation(s)

STOCK G.M. (1) ; MARTEL S.J. (2) ; COLLINS B.D. (3) ; HARP E.L. (4) ;
(1) National Park Service, Yosemite National Park, California, El Portal, ETATS-UNIS
(2) Dep. of Geology and Geophysics, Univ. of Hawaii, Honolulu, ETATS-UNIS
(3) U.S. Geological Survey, Landslide Hazard Program, California, Menlo Park, ETATS-UNIS
(4) U.S. Geological Survey, Landslide Hazard Program, Colorado, Golden, ETATS-UNIS

Abstract

The AA. present high-resolution photography, video, and laser scanning data that document spatial and temporal patterns of a 15-month-long sequence of at least 14 rock falls from the Rhombus Wall, a sheeted granitic cliff in Yosemite Valley, California. They suggest that these progressive failures might have been related to stress redistributions accompanying propagation of sheeting joints behind the cliff face. Mechanical analyses indicate that tensile stresses should occur perpendicular to the cliff face and open sheeting joints, and that sheeting joints should propagate parallel to a cliff face from areas of stress concentrations. The analyses also account for how sheeting joints can propagate to lengths many times greater than their depths behind cliff faces. They posit that as a region of failure spreads across a cliff face, stress concentrations along its margin will spread with it, promoting further crack propagation and rock falls

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no5 [pp. 546-561]

Bibliographic references : 58 ref.

Collation : 16 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3192

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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