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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Water induced sliding of rocks on playas Alkali Flat in big Smoky Valley, Nevada

Auteur :
WEHMEIER, E.

Description :
Field evidence, climatological data, and calculations based on physics prove that tracks on the Alkali Flat, caused by sliding stones (playa scrapers), result from subaquatic or at least inaquatic sliding. Driving force usually is the hydraulic energy of surface runoff. Occasionally wind may contribute additional energy but even then it is mainly propagated through the water. This contribution to microgeomorphology and to geomorphodynamics sheds new light on the genesis of sliding tracks and helps to revise the common view of wind as the geomorphic agent on playa surfaces.


Type de document :
Article de périodique

Source :
Catena, 1986, vol. 13, n°. 2, p. 197-209, Références bibliographiques : 7 réf.

Date :
1986

Langue :
Anglais
Droits :
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