Prelab7 - EarthScience PreLab:...

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Earth Science PreLab: Geologic Maps and Structures Geologic Map: a map that shows the types, ages, distribution, and orientation of  rocks on the surface of Earth Stress: the term used to describe the force that acts on a rock unit to change its  shape or volume Compressional  stress: forces that act to shorten a rock body Tensional stress: forces that elongate or pulls apart a rock unit Shear stress: forces that tend to break or bend a rock unit Plastic Deformation:  permanent deformation caused by flowing and folding at  stresses above the elastic limit at high confining pressure and/or temperature Fold: A bent rock layer or series of layers that were originally horizontal and  subsequently deformed Fault: a break in a rock mass along which movement has occurred Joint: a fracture or break in a rock along which there has been no displacement
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  • Fall '09
  • Brocannn
  • Vertical market, footwall Reverse fault, footwall Right­lateral fault, right Left­Lateral Fault, Dip­slip fault

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Prelab7 - EarthScience PreLab:...

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