Earth Sciences 1022A/B Lecture Notes - Lecture 9: Monocline, Syncline, Anticline
19 Oct 2016
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Document Summary
Stress (force) on rocks: (diagrams in notes: compressional squeezing, tensional stretching, shear slipping sideways. Under stress, rocks can exceed the elastic limit before owing (ductile deformation) or being fractured (brittle deformation: brittle deformation common near surface, ductile deformation common at depth. Strike: azimuth of a horizontal line on the surface of a plane. Dip: angle of inclination of the surface from horizontal. Folds: compressional forces (diagram in notes: anticline (arch, syncline (trough, monocline (step, dome (oldest rock in middle) (diagram in notes, basin (youngest rock in middle) (diagram in notes) Faults: displacement of rocks: dip-slip: along dip of fault (diagrams in notes) Normal hanging wall went down tensional stress exhibited. Reverse, thrust hanging wall went up compressional stress exhibited: strike-slip: movement laterally along strike of fault (diagrams in notes) Right-lateral rocks displaced to the right. Left-lateral rocks displaced to the left.
