دلائل التحول المناخي خلال عصري البلايستوسين و الهولوسين في هضبة المستوي بمنطقة المملكة العربية السعودية

الملخص EN

There is lack of complete picture of Paleoenvironment document regarding to the soil genesis , remains of plants, animals , microorganisms and human activity in Al Qassim and Al Mustwi Plateau during the Late Quaternary period, especially age, genesis and their relation to Paleogeomorphology and Paleoclimate.

It may certainly become that the study of these Phenomena may help to examine and reconstruct of the environmental changes in these parts of Saudi Arabia..

A spatial survey using remote sensing techniques, shuttle Radar Topography Mission (STRM) , in addition Radiocarbon 14 dating( C 14) and Optically Stimulated Luminescence dating method(OSL), all of these techniques help to provide a clear view regarding to tropical conditions prevailed in Al Mustawi plateau and beyond that help to linked their ages and developments with elsewhere in the Arabian Peninsula such as that in the great Al Nafud, Rub Al Khali, North Al Qassim, or that be in Jordan , therefore, led to reconstruction of environmental changes prevailed in the Arabian Peninsula during Late Quaternary.

The findings of this research have shown evidence for vegetarian growth and high extend of plants, animals and microorganisms covering the landscape in the Safra Al Mustawi during 221 ka under the effectiveness of Indian Ocean Monsoon rainfall.

Therefore similar vegetarian growth lookalike jungle trees and tropical savanna prevailed during 11500cal.BP.

In the next periods specifically in the mid of Holocene aridity prevailed in Al Mustwi Plateau, in response to the enhanced Shamal winds, and the plants, animals and microorganisms did not hold up in front of the extremely dry that prevailed in this part of Al Qassim after the 5000 years