Earth Sciences 1022A/B Lecture Notes - Lecture 9: Monocline, Slickenside, Syncline
11 Apr 2016
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Document Summary
Rocks can be deformed to produce structures that can yield energy and ore reserves. Deformaion: when rocks are stressed beyond their strength they change shape, size. Compressional stress squeezes rocks and shortens earth"s crust, Shear stress causes sideways slip of crust. Ducile deformaion that is common deep in the crust (under high p, t condiions) Strong rocks tend to fracture while weak rocks tend to low (in the solid state) however, with enough ime even strong britle rocks will eventually low. Mapping geologic structures: geologists measure rock structures in outcrops, using. Strike - compass direcion of horizontal line on the planar surface of a bed or fault. Dip angle of inclinaion (fall line) of the surface, at a right angle to the strike. Folds due to compressional stress, resuling in shortening, thickening of crust; have limbs on either side of a fold axis, and an axial plane that evenly divides the limbs.
