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 so much of his operating existence within the center East, in particular in Arabia, the place he has been lively in oil exploration, and basically in collage instructing and learn as a Professor of Geology on the Amercian college 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 complete insurance of the entire deserts of Arabia principally according to the author’s adventure in Arabia during the last fifty years. precise landforms of Arabia deserts are defined, including their geological surroundings and the impact of climates either prior and current. The six nice sand seas of Arabia are emphasised because Ar Rub’ al Khali wilderness varieties the world’s biggest non-stop sand desolate tract. resources, sedimentology, and the mechanisms of formation of those nice sand deserts are tested. specific sand dunes and interdunes forms present in Arabia are defined, categorized and defined. Fluvial tactics are mentioned, in addition to the various oases, and lake deposits shaped in milder, extra humid durations. huge parts of black, basaltic, volcanic wasteland are defined masking 3 times the world of Belgium. Ecology of Arabia and human effect on desertification are defined. Climatic alterations within the evolution of Arabian deserts throughout the Quaternary and their explanations are defined and a chronology of climatic occasions in the course of their formation is established.
This publication might be of curiosity to geoscientists, specially Quaternary geologists, geomorphologists, geographers, sedimentologists attracted to aeolian and fluvial strategies, climatologists, coastal reviews teams, desertification curiosity teams, and ecologists with curiosity in arid lands.
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Extra info for Arabian Deserts: Nature, Origin, and Evolution
They are stabilized as indicated by the sparse vegetation cover and sheep and goat tracks on their slopes. An overall view of the Baiji Desert in northern Iraq (dark patches) with the Tigris River on the west and Adhaim River on the east. Al Sharri salt flats are the white patch to the south–east Image width is 90 km. pl). A central part of Baiji Desert surrounded by farmland showing the numerous small transverse dunes formed by prevailing NW Shamal winds. Image width is 2 km. pl) Southern Alluvial Plains Desert, southern Iraq.
III. Convection and interferential types (with a system of winds of equal force and with winds of mutually perpendicular directions): 1 – barchan cirques; 2 – pyramidal barchans; 3 – crossed compound barchans. B. Sparsely overgrown sands (mostly of non-tropical deserts). I. Trade-wind type: 1 – initial hummocks on shrubs; 2 – small ripples; 3 – ridgy sand (parallel to the wind); 4 – wide ridgy sands. II. Monsoon-breeze type; 1 – ridgy-alveolar sands (one strong predominant wind); 2 – alveolar sands; 3 – rake-type transverse ridges (slightly predominant wind of one direction); 4 – transverse asymmetrical ridges.
26. Khawr Ruri in coastal Dhofar, southern Oman, site of the ancient frankincense port and city of Sumhuram of 2,000 years ago. A barrier bar has now shut off this khawr forming an enclosed lagoon. Note the lasting effect of vehicle tracks on the thin, grey, encrusted, biogenic, desert surface. (Photo by H. S. Edgell). 27. Sharm Rabigh, an inlet with a partial barrier or sand spit on the Red Sea coast of Saudi Arabia. Image width is 10 km. pl). 28. Khawr al Khaimah in the north–eastern UAE, showing the large sand spit barrier on which the city of Ra’s al Khaimah is located, the spit of Julfah to the north–east, and the large alluvial fan where Wadi Bih emerges from the Oman Mountains, and a large wadi, from the Wadi at Tawyan system, causing local inundation where it enters from the south.
Arabian Deserts: Nature, Origin, and Evolution by H. Stewart Edgell