The term, fracture assemblage, is used here to describe the geometry of, and interrelationship between different fracture types which are commonly associated. Fractures of the same type are dealt with under 'Fracture Multiple Sets' and will not be considered in this section. Another category occurs when a younger set of one fracture type intersects and overprints an older set of different type without any obvious effect of the older set on the formation and orientation of the younger one. For example, Figure 1 shows a case in which a vein set (V) cuts across an older pressure solution seam set (PS) at an angle without any evidence of any interaction between the two fracture types. We will not consider this configuration either. Rather, here we focus primarily on a category of assemblages made up of different fracture types, one of which affects the formation, orientation, and distribution of the other. Please follow the links below.

Figure 1. An array of veins (V) cutting across an array of older pressure solution seams (PS) in limestone. Photographed from a table top, Hill Side resort, western Turkey.