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Chronology of Late Pleistocene environmental changes in the lower Mahi basin, western India
Author(s) -
Juyal Navin,
Raj Rachna,
Maurya Deepak M.,
Chamyal Laxman S.,
Singhvi Ashok K.
Publication year - 2000
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/1099-1417(200007)15:5<501::aid-jqs528>3.0.co;2-j
Subject(s) - geology , fluvial , chronology , sedimentary depositional environment , pleistocene , aeolian processes , aggradation , paleontology , interglacial , isotopes of oxygen , structural basin , marine isotope stage , geomorphology , geochemistry
Sediments exposed in the lower Mahi basin at the southern fringe of the Thar Desert, Rajasthan, India, provide evidence of three distinct depositional environments, namely marine, aeolian and fluvial. These have been used to reconstruct Late Pleistocene environmental and tectonic history of the region. Infrared stimulated luminescence (IRSL) chronology of the fluvial and aeolian litho‐units provides evidence of two major fluvial aggradation phases in the region corresponding to Oxygen Isotopic Stages 5 and 3. The basal marine clay is inferred to represent the last interglacial stage and its present elevation at +20 m a.s.l. is attributed to post‐depositional tectonism. Comparison of fluvial records from other regions indicates interhemispherically documented wetter phases during Oxygen Isotope Stages 5 and 3. Copyright © 2000 John Wiley & Sons, Ltd.