Luminescence chronology and facies development of Bhur sands in the interfluve region of Central Ganga Plain, India

Citation
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
Citations number
25
Categorie Soggetti
Multidisciplinary,Multidisciplinary
Journal title
CURRENT SCIENCE
ISSN journal
00113891 → ACNP
Volume
78
Issue
4
Year of publication
2000
Pages
498 - 503
Database
ISI
SICI code
0011-3891(20000225)78:4<498:LCAFDO>2.0.ZU;2-I
Abstract
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.