The problem of bedding, a basic feature of most sedimenta- ry rocks, is as old as the science of geology itself. We use bedding in structural geology, regional correlation and for estimating the time involved in the strati'9Taphic record. Nevertheless we still are far from fully under- standing the processes involved. This is particularly true for carbonate rocks, where primary phenomena are sometimes difficult to separate from the secondary diagenetic over- print. After new interest in the subject had arisen from the International Deep Sea Drilling Project and from pa- leoecological studies...