GLY3400 Study Guide Exam 1

GLY3400 Study Guide Exam 1 - Primary Structures...

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Primary Structures Deformation: structural changes that take place in original location, orientation, shape, and volume of a rock Distortion: change in shape 4 Approaches to Structural Geology o Field Approach: Observe structure in the field/ nature o Experimental: Deform in lab… material testing labs o Theoretical: Computer model used to deform rock o Model Approach: Mechanical model… “sandbox models” Primary Structures : develop during formation of rock body… ex. in sediment (what it looked like before it deformed) Stratification: Bedding in sedimentary rocks Layering: found in igneous, metamorphic, and sedimentary rocks Plum-Bob: perpendicular to bedding Steno’s Law: Law of Original Horizontality o All strata is originally horizontal Cleavage: Surface something breaks on, Different than Bedding o Plane of cleavage: result of orientation of stress field Angle of Repose: function of grain size, moisture content o Dunes: deposited by winds bedding @ angle of repose Secondary Structures : created by stresses. Form in sedimentary or igneous rocks after lithification,
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GLY3400 Study Guide Exam 1 - Primary Structures...

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