P. Srivastava et al., Luminescence chronology and facies development of Bhur sands in the interfluve region of Central Ganga Plain, India, CURRENT SCI, 78(4), 2000, pp. 498-503
Bhur sand ridges in the upland interfluve surface are a distinctive feature
of the Ganga Plain and occur as arcuate, linear and oval geomorphic highs.
Their sedimentary sequence shows a few meter thick aeolian sand cover inva
riably underlain by fluvial channel deposits in the form of point bar succe
ssion. Infra-red stimulated luminescence (IRSL) dating of the topmost pare
of the channel sand and the overlying aeolian sediments yielded stratigraph
ically consistent results and indicated that the fluvial channel activity i
n the region ceased sometime during 7 to 5 ka. This was followed by a phase
of deposition of aeolian sand, suggesting a phase of weakened monsoon and
increased aridity.