Earth Sciences 1070A/B Lecture Notes - Lecture 8: Mesozoic, Proterozoic, Lithification
25 Apr 2017
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Unit 8 crustal deformation and structural geology. Rock has upper limit of internal strength beyond which will fracture or flow. Stress can be applied equally or unequally from different directions. Analyzing orientation of folds and faults, and small scale deformation structures, geologists can reconstruct the original tectonic setting and the sequence of deformation that affected the rocks. Deformation all changes in the orientation and location of. Stress amount of force applied to a given area. Strain visible result of the stress. Tensional stress stress pulls apart the rock, occurs at. Compressional stress two rocks forced past one another, Shear stress differential forces of rock move past each other, Brittle-deformation near-surface environments, rocks will break apart into fractures (low. Ductile deformation deep, disrupts crystal lattices of minerals and immediate. Subjected to stresses that exceed own strength, they deform by folding or faulting.
