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(Article of periodic en Anglais - 2009)

Document title

Aeolian activity at a giant sandstone weathering pit in arid south-central Utah

Authors(s) and Affiliation(s)

NETOFF D.I. (1) ; CHAN M.A. (2) ;
(1) Dep. of Geography and Geology, Sam Houston State Univ., Huntsville, ETATS-UNIS
(2) Geology and Geophysics, Univ. of Utah, Salt Lake City, ETATS-UNIS

Abstract

Aeolian abrasional, depositional and deflational features indicate exceptionally strong southwesterly winds in a giant sandstone weathering pit in Grand Staircase Escalante Monument. This pit has developed near the summit of a broad, barren high dome on the Lower Jurassic Navajo Sandstone. The field work involved describing the morphology and morphometry of the pit and groove, including a large variety of streamlined abrasional features. The combination of lags, groove marks, flutes, dedos and linear, sharp-crested ridges, and shifting dune sand within the pit are evidence of the aeolian activity. These dedos and other streamlined aeolian sculpted host-rock features occur in clusters and typically form in the lee of iron concretions. The dedos are similar to the controversial "stalked blueberries" on Mars. A bedrock valley descends to the southwest from the pit and groove, amplifying southwesterly winds

Source

Article of periodic

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

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

Millesime : 2009, vol. 34, no1 [pp. 99-108]

Bibliographic references : 1 p.

Collation : 10 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1697

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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