Bedform

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DOI: https://doi.org/10.1007/978-1-4614-9213-9_17-3

Definition

A bedform is a depositional feature whose genesis is through the action of a forcing fluid (e.g., air or water) resulting in the movement of the granular material, manifesting into characteristic surface morphology indicative of the flow parameters in operation.

Description

Deposits of sand and granule-size particles transported principally in saltation in flowing fluids organized into a regularly repeated pattern which forms on a solid surface because of the shearing action of a fluid. Bedforms can be aeolian or subaqueous, erosional, or depositional surface features. Fluids in which they form can be wind, water stream, or dense mixtures of particles and gases (e.g., volcanic or impact-induced base surges) (Wilson 1972; Greeley et al. 2006).

Morphometry/Morphology

On Earth, 2D bedforms are defined as having straight crestlinesand constant crest-trough depths relative to surrounding surface level. In cross section, 2D bedforms have identical foresets and bounding surface...

Keywords

Flow Depth Sand Wave Current Ripple Boundary Shear Stress Subaqueous Dune 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Environmental Sciences Research Institute, School of Environmental SciencesUniversity of UlsterColeraineUK
  2. 2.Planetary Science Research Group, Institute of Geography and Earth SciencesEötvös Loránd UniversityBudapestHungary