Large-Scale Flood Deposits Associated With the Formation of Coarse-Grained, Braided Terrace Sequences
Published:January 01, 1987
Judith K. Maizels, 1987. "Large-Scale Flood Deposits Associated With the Formation of Coarse-Grained, Braided Terrace Sequences", Recent Developments in Fluvial Sedimentology, Frank G. Ethridge, Romeo M. Flores, Michael D. Harvey
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Paleohydraulic data from outwash terrace sequences in New Zealand and Iceland suggest that they were formed by glacially controlled, high magnitude, incising flood events. Relic incision channels cut into the terrace surfaces provide evidence of steeper gradients, coarser sediment and thus greater bed-shear stresses, velocities, Froude numbers, and discharges than those of the braided channel systems on the terrace surfaces.
The paper proposes that channel incision and terrace formation can be generated by catastrophic floods which exceed the thresholds for channel entrenchment. These thresholds are defined by the flow conditions predicted by paleohydraulic modeling of the relic channels.
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Recent Developments in Fluvial Sedimentology
This volume brings together 36 of the manuscripts that were presented at the Third International Fluvial Sedimentology Conference hosted by Colorado State University in August, 1985. Fluvial systems and sedimentary rock sequences discussed range in age from Holocene to Precambrian and include many diverse areas. The principal objective of the volume was to document the recent developments in the application of facies analysis to the reconstruction of the architecture of fluvial systems. Reconstruction of architecture is an integral part of the overall process of basin analysis.