11.1 earth sci
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11.1 earth sci

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    11.1 earth sci 11.1 earth sci Presentation Transcript

    • 11.1 Rock Deformation
    • Stress
      • The force per unit area acting on a solid.
    • Strain
      • The change in shape or volume of a body of rock as a result of stress.
    • Anticline
      • Formed by the upfolding, or arching, of rock layers.
    • Synclines
      • Downfolds, or troughs, found in association with anticlines
    • Monoclines
      • Large, step-like folds in otherwise horizontal sedimentary strata
    • Normal fault
      • Occurs when the hanging wall block moves relative to the footwall block
    • Reverse fault
      • A fault in which the hanging wall block moves up relative to the footwall block.
    • Thrust fault
      • Reverse faults with dips of less than 45 degrees
    • Strike-slip fault
      • Faults in which the movement is parallel to the trend or strike, of the fault surface
    • Key Concepts
      • The factors that influence the strength of a rock and how it will deform include temperature, confining pressure, rock type, and time.
      • Rocks deform permanently in two ways: brittle deformation and ductile formation.
    • Key Concepts
      • Forces that are unable to deform rock when first applied may cause rock to flow if the force is maintained over a long period of time.
      • The three types of stresses that rocks commonly undergo are tensional stress, compressional stress, and shear stress.
    • Key Concepts
      • The three main types of folds are anticlines, synclines, and monoclines.
      • The major types of faults are normal faults, reverse faults, thrust faults, and strike-slip faults.