A diagram that depicts in a schematic way the relationships between small scale and major structure. In complex areas, you need to be a good cartographer apart from a good structural geologist. The block diagram shown is that of a part of the Barberton greenstone belt in RSA after deWitt, which shows that large scale structure is a mushroom formed by the superimposition of later upright on early reclined to recumbent structures with axes of later orthogonal to those of earlier ones. However, the actual relations are much too complex than shown in the figure. But considering the small area covered, the diagram is the best approximation.