The relationship of dune building to sea level
It has long been established that the bulk of Bermuda's limestones are Pleistocene age. The cyclical climatic fluctuations of that epoch have played a prominent role in the explanations of the geology. The alteration of dunes with geosols have been related to advances and retreats of the ice sheets.

The argument that dune activity was somehow related to high sea levels in Bermuda is supported by the existence of a close association between aeolian dunes and high marine deposits.

The commonly seen relationship is the pro-gradational sequence in which dunes rest upon high marine deposits of the same Formation. This indicates that a maximum sea level was shortly succeeded by dune building.