GSCI 1050 Lecture Notes - Lecture 15: Divergent Boundary, Orogeny, Convergent Boundary
15 May 2017
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Tuesday 3/28 in class quiz & oyo proposal due by 11:59pm. Which of the following tectonic settings can lead to the formation of mountains: convergent boundary, divergent boundary, both of these (divergent can also create mountains, just in a different way) Tectonic landforms: crustal stress and strain, crustal folds, crustal fractures, crustal geomorphology. Orogenic (mountain) belts: elongate, linear, constructed by plate interactions (orogenesis, associated with plate settings/boundaries, ex: rockies, appalachians, andes, himalayas, also east african rift. How do orogenic belts form: uplift, deformation & metamorphism, note - metamorphic rocks form in contact setting (magma) & regional metamorphism (mountain) Joints: faults (break & movement, folds, foliation (differential stress) Deformation types: change in shape, location, orientation. Strain is deformation in response to stress: foot stepping on single can, foot stepping on series of many cans, force constant, stress high, strain (cid:621)(cid:622) , force constant, stress low, strain none.
