مورفولوجية كريسستات هضبة نجد : دراسة تطبيقية على جال الوطاة

الملخص EN

AJ Wutah area forms a real geomorphological mosaic, in which there are surface different scenes, and that is a point of concern for the researcher .

In the east stretches a Permo - Triassic cuesta , which has very defined features .

There , its nose is about 657 ms.

above sea level upon a small depression in which the features of the erosional depression with the outer featural descriptions for Gararah on one hand, with the features of Khabrats and desert Sabkhats on the other.

Opposite to cuesta , there is an ideal calcareous duricrust which forms a horizontal extended layer ranging in thickness between 70 - 120 cms.

This duricrust may date back to the Early Quaternary pluvial epoch ; it was formed and increasingly developed through the arid and humid consecutive periods .

Over the cuesta's back , some shoots of karstic activity which gives some indistinct beginning for lapiez with CM dimensions completely obliterated under remains surface covered with finer calcification as a result of physical weathering.