Photographs

FIG. 47a.  Bedforms with superimposed bedforms migrating in a divergent direction.  Dunes with superimposed dunes, Algodones, California; oblique air photograph taken by Gary Kocurek.  The main dune at the lower left is migrating from right to left; the dunes superimposed on its lee slope are migrating toward the viewer, a divergence of 90 degrees, as simulated in Figure 46D-N.  At other locations, such as where indicated by the arrow, the divergence is roughly 45 degrees, as simulated in Figure 46A.  The height of the main dunes is approximately 10-20 m.