Rock deformation, experimental
- Fred A. Donath
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Experimental rock deformation is concerned with evaluating, through controlled laboratory experiments, the effects of environmental and material factors on the deformational behavior of rocks. A rock is said to be deformed when it has suffered a change in shape, a change in volume, or a loss of cohesion. Of concern here are the irrecoverable, inelastic aspects of deformation.
Hydrostatic stress reduces pore space and produces volume change only; all permanent deformation of significance in rock results from the action of differential stress and is expressed as fracture, flow, or a combination of the two. Fracture is deformation with complete loss of cohesion and is characterized by a physical discontinuity across which tensile stress cannot act. Flow is any deformation, not instantly recoverable, without permanent loss of cohesion. A rock becomes permanently deformed when it is subjected to differential stress that exceeds its strengt ...
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- Rock deformation, experimental
- Reference Work Title
- Structural Geology and Tectonics
- Reference Work Part
- pp 688-699
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- Series Title
- Encyclopedia of Earth Science
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- Springer Berlin Heidelberg
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- Van Nostrand Reinhold Company Inc.
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