chapter_15_le modified

chapter_15_le modified - Geologic Structures Physical...

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Steve Kadel, Glendale Community College Geologic Structures Physical Geology 11/e, Chapter 15
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Geologic Structures Geologic structures are dynamically-produced patterns or arrangements of rock or sediment that result from, and give information about, forces within the Earth Produced as rocks change shape and orientation in response to applied stress Structural geology is the study of the shapes, arrangement, and interrelationships of rock units and the forces that cause them
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Stress and Strain Stress is force per unit area The three basic types of stress are compressive , tensional and shear Strain is a change in size or shape in response to stress Geologic structures are indicative of the type of stress and its rate of application, as well the physical properties of the rocks or sediments
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Rocks behave as elastic , ductile or brittle materials depending on: amount and rate of stress application type of rock temperature and pressure If deformed materials return to original shape after stress removal, they are behaving elastically However, once the stress exceeds the elastic limit
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This note was uploaded on 06/13/2011 for the course GEOL 1403 taught by Professor Mulcahey during the Spring '11 term at Lone Star College System.

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chapter_15_le modified - Geologic Structures Physical...

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