What causes that shelf on the beach?

[Myrtle Talk]

We had a user that provided a great explanation of what you were seeing. Also for those who don't know what we are talking about I've included a picture.

"The beach feature you are referring to is called an escarpment or "scarp". I have typically seen this occur on beaches that have been renourished recently. You may also see beach scarps form after large wave events such as Nor'easter's, Tropical Storms or Hurricanes."