Cross stratification has been invariably associated with a sedimentary cause, yet it exhibits significantly different features from those of sediments formed experimentally. Features of cross stratification are contrasted with those of sediments, and it is shown that cross stratification must have a completely different origin. A passible non-sedimentary process forming stratification of surface rocks involves the release of pressure on rocks being elevated from great depths of burial under water. Shattering due to expansion of diflused water disintegrates the rock in successive layers, forming stratified sand. In this new explanation of cross stratification, it is shown how such a process can account for the unique features of cross stratified rocks found in nature.