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Geology of the Pacific Northwest
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Table of Geologic Faults
Type of Fault Map Symbol Definition Type of Regional Stress Geologic Associations
normal hanging wall down, footwall up tension
  • zones of crustal extension
  • divergent plate boundaries
  • edges of horsts and grabens
  • Basin and Range region
detachment low-angle normal fault, footwall - gneiss, hanging wall - shallow-crust rocks tension
  • boundaries of metamorphic core complexes
thrust hanging wall up, footwall down compression
  • zones of crustal compression
  • convergent plate boundaries
reverse high-angle (45° or more dip) thrust fault compression
  • zones of crustal compression
  • convergent plate boundaries
strike-slip rocks on either side move horizontally in opposite directions shear
  • continental margins undergoing oblique (not straight on) plate convergence
  • transform plate boundaries
oblique-slip combines horizontal and vertical motion combination
  • orogenic mountain belts
  • continental margins undergoing oblique (not straight on) plate convergence

 

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Geology of the Pacific Northwest
Faults Table
© 2001 Ralph L. Dawes, Ph.D. and Cheryl D. Dawes
updated: 6/21/13