Overwash:
Look for a pattern where a depositional area occurs immediately landward of an erosional area, suggesting overtopping of the beach by wave runup. This results in erosion of the beach and net sediment transport (and deposition) landward. In this example, a low-lying spit was overwashed. This process occurs more extensively on the low-lying barrier islands of the East and Gulf of Mexico coasts, but there are many examples of overwash on the West coast during the 1997-98 El Niño winter as well.