A review of some of the more important experimental efforts concerning primary sedimentary structures has been made. Although both the engineering and geologic literature have been summarized, emphasis was placed on the engineering researches for the purpose of making these studies more readily available to geologists. The review shows that the tempo and sophistication of research related to sedimentary structures has increased markedly in recent years. It also reveals that very little is known about the physics of the processes which govern the formation of many primary sedimentary structures. However, a great wealth of useful facts and data are available for certain topics such as ripple and dune migration, bed-load transportation, and scour.