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Author Pant, R. K. ♦ Basavaiah, N. ♦ Juyal, N. ♦ Saini, N. K. ♦ Yadava, M. G. ♦ Appel, E. ♦ Singhvi, A. K.
Source Indian Institute of Geomagnetism
Content type Text
File Format PDF
Copyright Year ©2005
Language English
Subject Keyword Central Himalayas ♦ Mineral Magnetism ♦ Geochemistry ♦ Luminescence Dating ♦ Monsoon ♦ Loess
Abstract The southwest monsoon that dominated Central Himalaya has preserved loessic silt deposits preserved in patches that are proximal to periglacial areas. The occurrence of such silts suggests contemporary prevalence of cold and dry northwesterly winds. Field stratigraphy, geochemistry, mineral magnetism, infrared stimulated luminescence (IRSL) and radiocarbon dating has enabled reconstruction of an event chronology during the past 20 ka. Three events of loess accretion could be identified. The first two events of loess deposition occurred betweem 20 and 9 ka and were separated by a phase of moderate weathering. Pedogenesis at the end of this event gave rise to a well-developed soil that was bracketed around 9 to > 4 ka. This was followed by the third phase of loess accretion that occurred around 4 to > 1 ka. Episodes of loess deposition and soil formation are interpreted in terms of changes in the strength of the Indian southwest monsoon.
Education Level UG and PG
Learning Resource Type Article
Accession No. 090964
Journal Journal of Quaternary Science
Volume Number 20
Issue Number 5
Page Count 8
Starting Page 485
Ending Page 492