ESS105H1 Lecture Notes - Lecture 9: Isostasy, Lithosphere, North American Cordillera
Document Summary
8. mountains and geologic structures: mountains and structures recall from previous lectures: Isostasy and erosion these 3 concepts are important to understanding mountains and structures brittle deformation of rock (rock fractures) ==> joints and faults ductile deformation of rock (rock ows as weak solid) ==> folds and shear zones strength of rock. 61 (1 / 4) : mountains and structures strength of rock depends on pressure temperature, and composition strength of the crust and lithosphere joints and faults. 61 (2 / 4) - joints and faults: mountains and structures normal fault reverse/thrust fault strike-slip fault folds. 61 (3 / 4) : mountains and structures folds anticlines and synclines description of fold: limbs, hinge, axial surface. 61 (4 / 4) - structures at plate boundaries structures at plate boundaries divergent plate boundaries rift valleys ex: opening of the atlantic ocean convergent plate boundaries subduction zones: accretionary prism, volcanoes, fold-and-thrust belt, foreland basin continent collision.
