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Mountain Formation

Mountain Formation. 1. Mountain Formation. The process of tectonic mountain building is called orogenesis . Mountains are formed by tectonic forces called stress. 2. Types of stress. Tensional – pulling apart Compressional – pushing together

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Mountain Formation

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  1. Mountain Formation

  2. 1. Mountain Formation • The process of tectonic mountain building is called orogenesis. • Mountains are formed by tectonic forces called stress.

  3. 2. Types of stress • Tensional – pulling apart • Compressional – pushing together • Shear – parallel forces, also called “strike slip”

  4. 3. Types of Mountain Ranges • Fault block mountains caused by tensional stresses. • Also called Horst and Graben • Grand Tetons, Sierra Nevada, Basin and Range

  5. Horst and Graben Horst Graben

  6. V. Types of Mountain Ranges b. Fold Belt Mountains - caused by compressional stresses • largest and most complex mountain systems in the world • Alps, Appalachains, Himilayas, Northern Rockies, Urals,

  7. V. Types of Mountain Ranges

  8. V. Types of Mountain Ranges c. Upwarped Mountains – caused by a broad arching of the crust. Usually caused by a magmatic intrusion lifting the crust. • Also called dome mountains • Southern Rockies, Black Hills, Adirondacks

  9. V. Types of Mountain Ranges d. Volcanic Mountains – formed by repeated volcanic eruptions • Mt Kilamanjaro, Cascade Mountains.

  10. Mountain Ranges of the World

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