أدلة فيضان وادي الطرفية رافد وادي الرمة بإقليم القصيم خلال الرباعي المتأخر أواسط المملكة العربية السعودية

الملخص EN

Of particular interest when seeking information about the Quaternary period are the fluvial deposits in both Wadi Al Rimah and Al Tarafiyah¨ its tributaryÆ The numerical dating technique used helped to examine and reconstruct the palaeoenvironmental history of Wadi Al TarafiyahÆ The principle findings have revealed that Wadi was active during the Marine Isotope Stages 5c and 3 as a consequence of rainfall¨ most likely derived from cyclones that were responsible for intense Mediterranean rainsª although potentially the water was derived from a combination of monsoon rains and contributions from lakes and lacustrine tufa located both in and around the wadi at this timeÆ It has also been found that by the middle of the Holocene¨ ca 5 ka¨ the Wadi Tarafiyah was covered by windblown sheets¨ most likely under the influence of Shamal windsÆ At this time there was localised wadi flow caused by heavy rainfall during winter¨ with intervening long¨ hot and dusty seasons extending over consecutive years