Observations sur le colloque de l'A.G.F. du 5 mai 1979 : Variations climatiques et géomorphologie sur la bordure nord du Sahara (Palaeoclimatology of North Africa)

Abstract

In Northwestern Africa and many other countries gullying is the fact of warm an wet climates during interglacial or interstadial periods but « cryergie » and crusts were performed during dry and cold climates. This is in accordance with geomorphology, radio chronology and position of polar front of waters in Atlantic Ocean, well different of atmospheric polar front