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Chronology of red dune aggradations of South India and its Palaeo-environmental significance 总被引:1,自引:0,他引:1
Linto Alappat Palaniandy Seralathan Anil D. Shukla Kyth Pillai Thrivikramji Ashok Kumar Singhvi 《Geochronometria》2013,40(4):274-282
Red sand dunes occur in the coastal plains of south east and west of Tamil Nadu, India between the coordinates of 8°00′ to 9°30′ N; 77°18′ to 79° 00′ E. OSL dating of these sands indicated aggradations between ~16-9 ka and ~9-3 ka in the west and east coasts respectively. Dating results from inland red dunes at the foothills of Western Ghats show a break in deposition at ~6 ka and aggradation since ~2 ka. The sand aggradations in the west coast occurred during the transition period when SW monsoon in the area was reestablishing. The dunes attained their stability by 9 ka. In the coastal region, the aggradations were controlled by sea level changes and a local recycling of earlier dunes (in the east coast). In the inland areas, the dune building was controlled by sand supply from fluvial sources. 相似文献
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