EESA06H3 Study Guide - Final Guide: Graben, Anticline, Compressive Stress
22 May 2016
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Document Summary
Structural geology the branch of geology concerned with the shapes, arrangement and interrelationships of bedrock units and the forces that cause them. Deformation may cause a change in orientation, location and shape of a rock body. Stress a force per unit area: stress can be measured, expressed as force per unit at a particular point; difficult to measure stress in rocks that are currently buried. Strain the change in size (volume) or shape, or both, in response to stress. Tensional stress forces pulling away from one another in opposite directions: results in a stretching or extension of material; causing elongate or stretch parallel to applied stress. Shear stress stresses acting parallel to a plane: results in a shear strain parallel to the directions of the stresses, occurring along actively moving faults. Rocks behave as elastic, ductile, or brittle materials depending on amount of stress applied, type of rock and temperature/pressure the rock is strained.
