 Various claims have been made for this feature's being either a wall, road, pier, breakwater, or other man-made structure.However, credible evidence or arguments are lacking for such an origin.On September 2, 1968, while diving in three fathoms () of water off the northwest coast of North Bimini island, Joseph Manson Valentine, Jacques Mayol and Robert Angove encountered an extensive "pavement" of what later was found to be noticeably rounded stones of varying size and thickness.