(Article of periodic en Anglais - 2008)

Document title

Multi-phase evolution of gnammas (weathering pits) in a Holocene deglacial granite landscape, Minnesota (USA)

Authors(s) and Affiliation(s)



In this paper the AA. carry out a gnamma morphometric analysis (GMA) by quantifying the morphometry of 85 gnammas from exposed granite in western Minnesota. The study site was last covered by the Laurentide Ice Sheet during the Early Holocene to late Pleistocene transition. The deglaciation of the region was followed by exhumation by paleofloods, which provides further chronological control for the gnamma population. A special emphasis is placed on the comparison of the depth ratio/age relationship determined for this site with other well established gnamma localities around the world. Finally the AA. discuss the possible processes that may account for variations in the depth ratio


Article of periodic

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

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

Millesime : 2008, vol. 33, no2 [pp. 165-177]

Bibliographic references : 58 ref.

Collation : Illustration ;




Laboratoire INTERGEO - Paris

INIST-CNRS, Cote INIST : 17355

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2008.
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