PPT-Fault and Folds: Deformation of the Crust

Isostasy When gravitational and buoyant forces are equal a state of isostasy exists As erosion wears away the crust the lithosphere becomes lighter and rises As erosion continues the . By Steven Stokes, Daniel Rollins, Matthew Sahawneh, Krystal Russell, and Ashley Stewart. Cheaha State Park . Located in northern Clay and southwestern Cleburne counties. May 20-25 . Where We’re Going . Deformation. Whether a material bends or breaks depends on . h. ow much stress is applied to the material.. Deformation. Process by which the shape of a rock changes because of stress.. Objectives:. Describe. Lower Crust . and . Upper Mantle: Evidence . from . Rock Mechanics, Geodesy, and . Field Observations. Roland . Burgmann. . and Georg . Dresen. Key Purposes. Concerned . with describing material properties through constitutive equations that relate . Lecture 29. Gly. 326. Compression and deformation. In areas of compression, we have several options for deformation. Dependent on lithology, rock strength, confinement, fluid occurrence, etc.. Reverse/Thrust faults. How Rocks Deform. Deformation. . . = bending, tilting, or breaking Earth’s crust.. Isostasy. Deformation can be due to two opposing forces:. gravity, or weight, of the . lithosphere. pressing down on the . Answer these 2 questions in your journal!. 1. . Tectonic plates consist . of… . a. . continental crust. . . b. . oceanic . crust.. c. . both continental and oceanic . crust.. d. . mesosphere. .. 2. The deep interior of the Earth can be mapped . pg. . 115. http://www.indiana.edu/~g103/G103/week9/wk9.html. . http://www.uwgb.edu/DutchS/EarthSC202Notes/quakes.htm. . Folding. : . When . Rock Layers. . Bend. . because of STRESS. What are anticlines?. Mr Boland . Geography. The earths crust is divided into layers. But because the earths plates are convergent, neutral and divergent the layers of the earths crust have been changed and deformed.. The three types of deformation are. pg. . 115. http://www.indiana.edu/~g103/G103/week9/wk9.html. . http://www.uwgb.edu/DutchS/EarthSC202Notes/quakes.htm. . Folding. : . When . Rock Layers. . Bend. . because of STRESS. What are anticlines?. Abstract--First generation structures in greywackes of the Yuso Group from the Cantabrian Mountains of northern Spain show a distinct variation in geometry with depth in a regional synclinal structure Geo 281: geology for engineers. Geology and Geophysics Department. King Saud University. ROCK . DEFORMATION (STRESS). Tectonic forces exert different types of stress on rocks in different geologic environments. . Stress & Strain. Stress: a force applied to an area.. Example: tire pressure in psi.. Strain: a change in original shape or volume (produced by stress).. Elastic strain: analogous to a steel spring or rubber band.. Arianne Petley-Ragan. 1,*. , . Ben-Zion, Y.. 2. , . Austrheim. , H.. 1. , . Ildefonse. , B.. 3. , Renard, F.. 1,4. and Jamtveit, B.. 1. 1. Physics of Geological Processes, The . Njord. Centre, University of Oslo, Oslo, Norway. -Reviewed by Jody R. Becker-. Post . Laramide. Forces at Work. Some Possible Models for Deformation. Trench pull and . S. ubduction. zone rollback. Rotation of the . Cascadia. . Forearc. Development and propagation of San Andreas and Walker Lane fault systems.