Cross-bedded sedimentation

Figure 1.3. Sketches of cross bedding as found in the Miami Limestone. A-B, Erosion and deposition alternate on sides of a tidal bar when tidal direction changes, resulting in (C) accretion of alternating layers, or strata, of varying thicknesses. D, Individual ooid layers also vary in grain size.
Shinn, E.A., and Lidz, B.H., 2018, Geology of the Florida Keys: University Press of Florida, 153 p.