Joints
The joints are fractures of the rocks in which no displacement of the blocks. If there is displacement, we can no longer speak of joints, but they would be failures.
According to their origin, some types of cleats are distinguished:
- Of retraction. Fractures formed in rocks when they lose volume. For example, clays when dehydrating or basalt when solidifying.
- Of tension. For example, when the bends due to the tension existing in the external part of the hinge, joints are produced.
- By compression. On the inside of the flap of the pleats.
De PePeEfe - Trabajo propio, GFDL, https://commons.wikimedia.org/w/index.php?curid=6271493