地球内部过程 Geologic Tectonics Joints The presence and orientation of joints have significant effects on the bulk properties of rocks, and their description is an important stage in most site investigations. Joints may be non-systematic, but often occur as a set of parallel planes. If two or more sets are present, they form a system of joints Prominent joints which are continuous as a single plane surface for hundreds of metres are called master joints 环境迪顶学 minoucntalocelogu ,率地球内部过程 Geologic Tectonics • Joints The presence and orientation of joints have significant effects on the bulk properties of rocks, and their description is an important stage in most site investigations. Joints may be non-systematic, but often occur as a set of parallel planes. If two or more sets are present, they form a system of joints. Prominent joints which are continuous as a single plane surface for hundreds of metres are called master joints