GEOL 355 Lecture Notes - Lecture 2: Structural Geology, Differential Stress
30 Aug 2016
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Structural geology is the study of deformed earth materials (usually rocks) and the processes that caused the deformation. Much of the structural geology involves an ability to visualize 3d relationship of objects and an understanding of how they have changed with time (4-d) Changes in shape, position or orientation of a body resulting from the application of a differential stress. Changes in shape, or volume of a body or what we study in structural geology. Differentiate between finite strain (final strained state) and infinitesimal or incremental strain (the intermediate steps of strain) The force per unit area acting on a plane. Stresses result from: gravitational forces, plate motion. Do not refer to a compressional strain or a contractional stress . Strains are changes in shape, size, or volume. Geometry-how big something is (size) and how it is aligned in space (orientation) Kinematics- description of the particle movement history of objects.
