Akhavan Ghalibaf, M.; Alhoseini Almodarresi, B.B.S; Universidad de Murcia
ABSTRACT
This paper discuses the genesis of land cracks and land depression as one of the clayey
desert futures in Central Iran. The origin of this future has been issued after downfall of ground
water pressure. The clay mineralogy showed that the swelling clays of smectite groups (like as
beidellite) as vertisols can be mainspring for this limitation future in Central Iran. It concluded
that pedogenesis in the paleoclimates was effective to form these smectite groups of minerals in
paleosoils of Yazd, Central Iran.