EARTH121 Chapter Notes - Chapter 9: Differential Stress, Geologic Time Scale, Gypsum
29 Aug 2016
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Document Summary
Sructural geology study of the architecture of earth"s crust and the influence of deformation on that architecture. Studying orientation of faults and folds and small-scale features of deformed rocks = reconstruction of original geologic setting and the forces generating structures. Important for earth"s history, resource exploration in reservoirs / ore deposits, construction (bridges, dams, nuclear power plants) Rocks have limit until it fractures or flows. Deformation changes in the original form or size of a rock body; can change location, orientation, or shape. Most crustal deformation occurs along/near plate margins due to tectonic forces. Force any influence that tends to put stationary objects in motion or changes the motions of moving bodies. Stress amount of force applied over a given area (concentration of force) Can be uniform or non-uniform (differential, directed pressure) Strain visible result of force; objects do not retain their original configuration during deformation. Compressional stress shortens: associated with plate collisions.
