Le Sahara: géomorphologie et paléogéomorphologie éoliennes in The Sahara and the Nile. Quaternary environments and prehistoric occupation in northern Africa.

Auteurs :
MAINGUET, M.
CANON, L.
CHEMIN, M. C.
WILLIAMS, M. A. J.
FAURE, H.

Description :
At the present time wind is the most active geomorphic agent in the Sahara. In addition, fixed dunes along the margins of the desert testify to the former extent of wind action during times of even drier climate. Satellite images and air photos support the view that from the Red Sea to the Atlantic the Sahara operates as a dynamic unit with respect to wind action. The movement of sand is in harmony with the trade wind circulation, except where the sand flows around major topographic obstacles, with the result that individual sand currents may be moving counter to the regional wind direction.


Type de document :
Monographie

Source :
, p. 17-35, Références bibliographiques : 35réf.

Date :
1980

Identifiants :
isbn : 90-6191-012-9

Editeur :
Pays édition : Inconnu