The aim of this study is to delineate and investigate the various forms of yardangs in the Um Al-Rimam depressions in the northern part of Kuwait. On lithological bases, three main types of yardang have been identified: 7 yardangs are sculptured
in sandstones of Lower Fars Formation (Lower to Middle Miocene), 23 are carved in calcretic rocks of Ghar Formation (Oligocene to Lower Miocene), and 11 yardangs are developed in Quaternary sediments. It is believed, as indicated from field observation
and interpretation of aerial photos, that the majority of yardangs are pre-existing bedrock forms. These forms were developed by paleo-surface hydrological processes which were modified by wind action in latter phase.
The aim of this paper is to report on yardangs in the Payun Matru Volcanic Field, a semiarid area east of the southern Andes mountains, and to analyse the geomorphic fators for their formation, and their relationship to the upper Pleistocene
and Holocene lava flow events in the area. The yardang development is explained by the strong unidirectional winds, the poor vegetational cover due to the aridity of the region, the available quartz sand and volcanic ash particles as abrasive agents
This work reveals the existence of yardangs in the central sector of the semiarid Ebro Depression of Spain. Almost all the documented yardang fields are located in extreme arid environments. The yardangs are developed in horizontal tertiary gypsum
and establishes the geomorphological evolution of playa-yardang systems.
Etude des yardangs des grès cambro-ordoviciens de Saq dans le nord-ouest de l'Arabie Saoudite. Un réseau de diaclases contrôle étroitement la forme des yardangs dont l'âge est inconnu, mais les taux d'abrasion mesurés sur des inscriptions préservées
sur des tombes nabatéennes voisines suggèrent que cet essaim date de plusieurs centaines de milliers d'années. Les datations des spéléothèmes donnent aussi une indication sur la période de façonnement de ces yardangs.
The significance of yardangs and ventifacted rock outcrops in the reconstruction of changes in the late Quaternary wind regime in the western desert of Egypt
L'orientation des yardangs allongés dans les playas et la direction de l'érosion éolienne des affleurements montrent que les vents dominants de surface dans l'Egypte du nord étaient les vents d'ouest pendant la période pré-holocène, avec son climat
Yardang landforms from Kharga Oasis, south-western Egypt
Des dépôts hydro-éoliens au sein d'anciens bassins lacustres du Sahara nord-oriental ont été affectés par des processus de déflation, de mouvement de masse et d'abrasion. Les formes spectaculaires de yardangs, qui résultent de cette combinaison de
The significance of yardangs and ventifacted rock outcrops in the reconstruction of changes in the late Quaternary wind regime in the western desert of Egypt
L'orientation des yardangs allongés dans les playas et la direction de l'érosion éolienne des affleurements, montrent que les vents dominants de surface dans l'Egypte du nord étaient les vents d'ouest pendant la période pré-holocène, avec son climat
Ablation éolienne ; Araouane bassin ; Eolien ; Erg ; Géographie de l'Afrique ; Holocène ; Kjokkenmoding ; Mali ; Quaternaire zone chaude ; Relief anthropique ; Sahara ; Yardang
L'action du vent au cours de l'Holocène a permis le façonnement de dunes de 5 à 7 m de haut, et le creusement de yardangs de 1 à 2 m de profondeur. Les ergs actuels se sont édifiés en moins de 4 000 ans en bordure des dépôts lacustres holocènes
A partir des motifs géomorphologiques (axe de migration des barkhanes, yardangs, systèmes crêtes-couloirs) et à l'aide de l'imagerie aérienne et satellitaire, ont pu être décelés pour l'ensemble du Sahara les grands courants éoliens transporteurs de
is demonstrated by 2 regional examples from the Syrian drylands with today's annual precipitation totals of 100-200 mm : fossil dunes in eastern central Syria and dunes and yardangs in southern Syria.
. Accordingly, in the Gödöllö Hills two ridges developed in wind-shielded position as large yardangs, where eolian dust accumulation and fluvial incision occured. - (AM)
. Climate is hyperarid. Results of the 2 scales of mapping (airphoto and Landsat image), supplemented by field observation north of Dakhla Oasis, further converged on an evolutionary scheme for this yardang field and a link is made between this scheme
trending spearhead-shaped ridges separated by a wide rectilinear valley of the same strike. Deflation plays a significant role in shaping the area, and the presence of two large-scale yardangs separated by a wind channel is proposed. Characteristics
as a possible source of the sand in Pasteur crater. Ancient layered sediments in Becquerel crater are actively being carved into flutes and yardangs by the blowing sands. Dunes in an un-named crater in Meridiani near the Mars Exploration Rover Opportunity