Gegenwalle is created when:
The dune traverses the forest
Forest land is exhumed
The dune is trapped by colonies of vegetation

The piping plover nests and raises its young:
On the Atlantic coastal beaches
In Cuba, the Bahamas and Mexico
On the ledges of limestone cliffs on P.E.I.

The deepest layer of ancient remains and artifacts in the Jones site belonged to:
Early Archaic
Late Prehistoric
Paleo-Indian