ENVS 1060 Lecture Notes - Lecture 11: Rubber Band, Leading Edge, Continental Crust
16 Dec 2015
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Document Summary
Elastic: when rocks that are subjected to stress stretch and snap back. Brittle: when rocks subjected to stress break and fracture. This often occurs with rocks at the earth"s surface. For example, this is like bending a wooden match too far and snapping it. Plastic: also known as ductile pressure, plastic deformation that occurs when the stress causes a change in the rock body without visible fractures. Stress is the directional pressure measured as force per area. The stress exerted on one side of a planar surface acts equally in the opposite direction on the other side, as in the action of a pair of scissors. Stress of this type is called a shear stress. The deformation caused in rocks by shear is called strain. of stress (shear stress) is called. (ans). Anticline: rock layers that are folded upwards and resemble an arch or an a". Syncline: formed by the down folding of rock layers and resemble a u.
