Figure 17.

Models of cross stratification generated by compound bed forms. (a) Superimposed bed forms migrating obliquely down the depositional slope of a larger bed form generate stratification that is expected along the secondary lee slope of Namib Dune. This style of stratification was identified by Lapotre et al. [2016] in ancient eolian strata at Meridiani Planum, Mars. (b) Superimposed linear, longitudinal bed forms migrating along a linear bed form. This style of stratification would be expected in the linear dune area of the Bagnold Dune Field. Note that the absence of high‐angle slopes in the linear bed form regime would limit the types of stratification present in the strata to those that form at less than the angle of repose (e.g., large and impact ripples).