GEOL 306 Lecture Notes - Lecture 13: Toothpaste
21 Feb 2018
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Viscous deformation (flow): under a constant load, flow occurs at constant deformation rate. Elastic deformation (bend): constant load produces a constant deformation. Load applied, material deformed, if load removed, material get back to initial position. Faults: evidence of brittle behavior of upper part of earth. Will go back if not too much tension, but high tension causes a brittle response in a fault. Normal fault: due to extension, causes lengthening. Reverse (thrust) faults: due to compression, causes. Earthquakes occur every time there is an abrupt movement along these faults. Temperature increases with depth, above 250-400 c rocks are more likely to deform ductilely. Most earthquakes occur only in upper half of crust shortening causes chear. Strike slip fault: due to compression and extension,
