إعادة بناء البيئة القديمة بنفود الشقيقة بالقصيم وسط المملكة العربية السعودية باستخدام تقنيات الاستشعار عن بعد والكربون المشع

Abstract EN

The Nafud Ash-Shuqayyiqah is one of the sands accumulation in southeastern part of A1 Qassim area, which are resulting from the continuous of Quaternary aeolian deposits (Holocene), that takes various of dune forms, spatial distributions and coloration due to the contrast of geomorphological factors and long-term effects of palaeoclimate change Using Remote Sensing techniques shows that the predominant dune forms are Linear dune systems, dome and start dunes above it in the eastern parts of Ash-Shuqayyiqah.

whilst the Barchanoid dune forms are limited in the northern parts, also sand sheets are dominated in the western side, in Addition, the Nabkh sands are wide spreading in the different parts of the study Area.

On the other side, using of Radiocarbon dating shown that the Nafud Ash- Shuqayyiqah was accumulated during wet phases during cal BP8270-8470 and The Palaeolakes and Tufas formed in cal BP6085-6095 , moving out through the mid-Holocene and towards present time there is evidence for drying out of the lakes systems and growth of sands sheets and clear of evidence of aeolain deposits in the middle and upper parts of Nafud Ash-Shuqayyiqah.