Figure 74. Structure deposited by straight-crested bedforms with two sets of straight-crested superimposed bedforms. The superimposed bedforms fluctuate in height, one set growing while the other set diminishes. The periods of height fluctuations are such that the superimposed bedforms experience 13 complete cycles during the time that the main bedform migrates one wavelength. Both sets of superimposed bedforms are migrating away from the viewer, one set obliquely up the lee slope and one set obliquely downslope. At the time that the bedform is depicted, the bedforms migrating up the main lee slope are decreasing in height, and the bedforms migrating down are increasing in height.
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U.S. Department of the Interior | U.S. Geological Survey | Western Coastal & Marine Geology
URL: http://walrus.wr.usgs.gov/seds/bedforms/movie_pages/movie74.html
Maintained by: Laura Zink Torresan
Modified: 17 October 2006 (lzt)