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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Universal Discontinuities in Bedforms Produced by the Wind
Ian G. Wilson (2)
ABSTRACT
Grain size, wavelength and experimental data on sand bedforms produced by the wind indicate the existence of eight distinct groups of structural elements, presumably formed by different mechanisms. Elements of similar wavelength are often associated, one normal and the other parallel to the wind. One kind of transverse ripple is probably formed by the impact of saltating grains; longitudinal elements associated with it may be due to vortices which develop as a result of the interaction between the transverse ridge and the airflow. The other six elements, which when paired make up aerodynamic ripples, dunes and draas, are probably all caused by secondary flows which are themselves due to primary instabilities in the airflow.
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