Subsurface sediment characteristics of the Great Rann of Kachchh, western India based on preliminary evaluation of textural analysis of two continuous sediment cores

作者：Maurya D M^*; Khonde N; Das Archana; Chowksey V; Chamyal L S

来源：Current Science, 2013, 104(8): 1071-1077.

• Great Rann
• Kachchh
• lithological characteristics
• textural analysis
• sediment cores
• subsurface stratigraphy

The present communication describes the lithological characteristics of two drill cores raised from the Great Rann of Kachchh based on physical characteristics, grain size distribution, textural characteristics and X-ray radiographs. The two cores were raised from the southern fringe of the salt-encrusted region, one to the north of Dhordo (similar to 60 m depth) in the central part of the Great Rann basin and the second from the northeast of Berada (similar to 51 m depth) in the southern Banni plain from the southern marginal part of the basin. Based on textural characteristics, the Dhordo core is subdivided into 16 litho units and the Berada core is subdivided into 13 litho units. Based on the AMS date of 17,700 +/- 86 cal years BP obtained from Dhordo core at a depth of 60.13 m and 9,515 +/- 61 cal years BP obtained from the basal part of the marine sequence in the Berada core at 38.88 m depth, we infer that the central part of the Great Rann basin was submerged by a shallow sea by similar to 18 ka BP, whereas the marginal parts, including the Banni plain were completely submerged by similar to 10 ka BP.

• 出版日期2013-4-25