Here is a video showing the formation and destruction of a modern antidune.
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In an antidune system, material is deposited on the lee side and eroded from the stoss side.
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An "'antidune "'is an upper flow regime sedimentary structure found in aquatic environments.
4.
The channel sandstone shows abundant trough cross-stratification and a possible antidune bedform composed of gravel and sand which indicates flow velocities as high as 200 cm / s ( 5 miles / hour ).
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