Structures and Sequences in Fine-Grained Point Bars of Yamuna River Near Etawah, Uttar Pradesh

Poiot bar sediments on two meander lobes of Yamuna river near Etawah, Uttar Pradesh are fine to very fine sand and silt, and moderately to wen sorted. Fining upward sequences of 60 to 280 cm thick are recognised in the top 4 meters of the point bar sequences. The large-scale trough cross-bedded fine-sand, a dominant lithofacies of the lower interval of fining upward sequence, corresponds to lateral accretion by migration of sinuous created dunes. The upper member consisting of ripple cross-lamioated, ripple drift-laminated and parallel-laminated fine sand and silt respectively, represents movement of small ripple bed forms and vertical accretion deposits of receding flood phase.