By H. Stewart Edgell
H. Stewart Edgell is a graduate of the collage of Sydney together with his doctorate in geology from Stanford collage. He has spent such a lot of his operating lifestyles within the heart East, in particular in Arabia, the place he has been lively in oil exploration, and essentially in college instructing and study 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 offers a accomplished insurance of all of the deserts of Arabia mostly in line with the author’s adventure in Arabia during the last fifty years. special landforms of Arabia deserts are defined, including their geological surroundings and the impression of climates either earlier and current. The six nice sand seas of Arabia are emphasised in view that Ar Rub’ al Khali desolate tract kinds the world’s greatest non-stop sand desolate tract. assets, sedimentology, and the mechanisms of formation of those nice sand deserts are tested. targeted sand dunes and interdunes varieties present in Arabia are defined, categorized and defined. Fluvial strategies are mentioned, in addition to the various oases, and lake deposits shaped in milder, extra humid periods. wide parts of black, basaltic, volcanic desolate tract are defined masking 3 times the world of Belgium. Ecology of Arabia and human impact on desertification are defined. Climatic adjustments within the evolution of Arabian deserts through the Quaternary and their explanations are defined and a chronology of climatic occasions in the course of their formation is established.
This publication should be of curiosity to geoscientists, particularly Quaternary geologists, geomorphologists, geographers, sedimentologists attracted to aeolian and fluvial methods, climatologists, coastal experiences teams, desertification curiosity teams, and ecologists with curiosity in arid lands.
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Additional info for Arabian Deserts: Nature, Origin, and Evolution
The striped area on the right consists of foliated Precambrian metamorphic rocks of the Arabian Shield. Width of image is 130 km. (Image courtesy of Image Analysis Laboratory, NASA Johnson Space Center). 23. Jabal as Sarat showing the blocky basalt surface, with some columnar basalt in the right foreground. (Photo by H. S. Edgell). 24. Harrat al Hutaymah volcanic field. Note the numerous Recent volcanic cones, appearing black often with a white central spot marking their crater. Image width is 50 km.
Numerous oblique sigmoidal complex dunes in the ‘Irq al Khuraym area, near an ‘irq of Ad Dahna seen as a broad oblique band from top left to lower right. They are sinuous and oblique to the prevailing wind. Image width is 8 km. pl). Simple straight linear dunes, or ‘uruq, of the Shaqqat al Kharitah in the south–western Rub‘ al Khali. Note the very regular spacing of ‘uruq with shuquq, or interdune corridors two to three times as wide as dunes. 50º E. (1994 DLR Synthetic aperture radar image X-SAR9404041).
Linear complex of giant linked crescentic dunes or megabarchans in the ‘Uruq ash Shaybah of the north–eastern Rub‘ al Khali up to 230 m high with stabilized slip faces and a network of smaller dunes on their windward slopes. Interdune sabkhah shows as dark grey areas. Image width is 10 km. pl). Linear complex of giant dome-shaped dunes in Nafud as Sirr, north–central Saudi Arabia. The lines of domes run diagonally from upper right to lower left or NE–SW. Note the small sigmoidal ridges on their surfaces and the numerous short radiating ridges around each dome.