 The downward movement of large, solid objects by scour and settling processes has been documented by Jesse E. McNinch, John T. Wells, and other researchers.They concluded that large, heavy objects could sink into the sea bottom by several meters without significant lateral movement as the result of scour and settling processes if an erosion-resistant layer of sediment were not encountered.In case of the beachrock blocks composing the Bimini Road and other pieces underlying it, the erosion-resistant layer that limited how far they were dropped downward by scour and settling processes is the Pleistocene limestone on which they now rest.