(Article of periodic en Anglais - 2010)

Document title

Butte detachment : how pre-rift geological structure and drainage integration drive escarpment evolution at rifted continental margins

Authors(s) and Affiliation(s)

GUNNELL Y. (1) ; HARBOR D.J. (2) ;
(1) Dep. of Geography, Univ. Paris Diderot, CNRS UMR 8591, Paris, FRANCE
(2) Dep. of Geology, Washington & Lee Univ., Lexington, ETATS-UNIS


Space-for-time substitution along 3 passive margin escarpments (Blue Ridge, Western Ghats, Eastern Ghats) reveals the significance of escarpment jumps and the detachment of topographic outliers, here generically termed ‘buttes’, as key processes of escarpment evolution. The examples show that these continental escarpments are strongly patterned after pre-rift structural and lithological heterogeneities. As seaward sloping drainages cut into the rift margin, they extend their drainage heads in a non-uniform and unsteady fashion. As a result escarpments can form, be destroyed, reform, and leave topographic vestiges (buttes) of the retreating escarpment. Given the pre-rift geological heterogeneities, there are no a priori reasons why escarpment landscape change should be uniform, steady or self-similar


Article of periodic

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

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

Millesime : 2010, vol. 35, no12 [pp. 1373-1385]

Bibliographic references : 52 ref.

Collation : 10 fig.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1973

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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