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7.4.3. Joints

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 faults.

According to their origin, some types of joints 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 folds due to the tension existing in the external part of the hingejoints are produced.
  • By compression. On the inside of the flap of the pleats.


         

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Biology and Geology teaching materials for Compulsory Secondary Education (ESO) and Baccalaureate students.