By H. Stewart Edgell
H. Stewart Edgell is a graduate of the collage of Sydney together with his doctorate in geology from Stanford college. He has spent such a lot of his operating existence within the heart East, specially in Arabia, the place he has been energetic in oil exploration, and basically in collage instructing and examine as a Professor of Geology on the Amercian collage of Beirut, the UNESCO/Saudi middle for utilized Geology, Jeddah, and King Fahd collage of Petroleum and Minerals, Dhahran, Saudi Arabia.
Arabian Deserts presents a entire insurance of the entire deserts of Arabia principally in line with the author’s adventure in Arabia over the past fifty years. particular landforms of Arabia deserts are defined, including their geological environment and the impression of climates either previous and current. The six nice sand seas of Arabia are emphasised due to the fact Ar Rub’ al Khali barren region varieties the world’s biggest non-stop sand barren region. assets, sedimentology, and the mechanisms of formation of those nice sand deserts are tested. designated sand dunes and interdunes varieties present in Arabia are defined, labeled and defined. Fluvial strategies are mentioned, in addition to the numerous oases, and lake deposits shaped in milder, extra humid periods. large components of black, basaltic, volcanic barren region are defined protecting 3 times the world of Belgium. Ecology of Arabia and human effect on desertification are defined. Climatic adjustments within the evolution of Arabian deserts through the Quaternary and their reasons are defined and a chronology of climatic occasions in the course of their formation is established.
This ebook could be of curiosity to geoscientists, specifically Quaternary geologists, geomorphologists, geographers, sedimentologists drawn to aeolian and fluvial tactics, climatologists, coastal stories teams, desertification curiosity teams, and ecologists with curiosity in arid lands.
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Extra info for Arabian Deserts: Nature, Origin, and Evolution
Aerial view of two linked megabarchans on the eastern edge of the ‘Uruq ash Shaybah in the north–eastern Rub‘ al Khali. Note the rows of barchans formed at the horns of the large megabarchan, and the barchans and dune ridges in the triangular area of its stoss slope. com ). ‘Uruq al Mut’aridah, a huge transverse dunefield in the north– eastern Rub‘ al Khali consisting mainly of megabarchanoid dune ridges separated by dark interdune corridors, or shuquq. This Landsat 7 image is 170 km wide. (Image courtesy of Image Analysis Laboratory, NASA Johnson Space Center).
A dunefield of smaller parabolic dunes lies to the west and is partly shown here. Image width is 2 km. pl). Typical dikakah, or nabkha (nabkhah) in the Sabkhat Muh area, south of Palmyra, Syria. The Palmyrene Ranges are in the background. (Photo credit M. Fukuda). Simple linear sigmoidal dunes in ‘Uruq Bani Ghudayy area of the south–western Rub‘ al Khali east of Al ‘Arid. 45º E. pl). Complex linear sigmoidal dunes in Al Mundafan area of the south–western Rub‘ al Khali showing the typical, long, sharp ridged sigmoidal dunes with many branching sigmoidal ridges.
The black volcanics of Harrat Hutaymah also appear in the lower left. Image width is 250 km. (NASA image highres_NM22_NM22-726-22. Image courtesy of Image Analysis Laboratory, NASA Johnson Space Center). 10. The 300 m thick Ordovician Wajid Sandstone on the eastern edge of the Asir Highlands. Erosion of this thick sandstone has also contributed sandy sediment to the SW Rub‘ al Khali. (Photo by H. S. Edgell). 11. The eastern Ramlat as Sab’atayn near the western Wadi Hadramawt showing the sinuous nature of dunes around topographical highs and the contribution to the development of dune sands made by widyan eroding the Tawilah Group sandstones.