deformation of the earths crust types of deformation 1.folds 2.faults

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  • DEFORMATION OF THE EARTHS CRUST

    Types of Deformation1.folds2.faults

  • Deformation1. Elastic nonpermanent, rock returns to original shape2. Ductile permanent, rock flows or bends3. Brittle permanent, rock breaks

  • Stress vs. StrainRheologyDeformationForce

  • DuctileBrittle

  • How Rocks Become Deformed1.compression forces2.tensional forces3.shearing forces

  • Stress vs. StrainRheologyDeformationForce

  • Stress vs. StrainRheologyDeformationForce

  • Folded Rocks1.due to compressional forces2.types of foldsi.monoclineii.anticlinesiii.synclines

  • Monocline, WYGeorge Davis

  • Folded Rocks3. anatomy of a foldi.limbsii.axial planeiii.plunge

  • Folded Rocks2.types of foldsiv.overturnedv.asymmetrical

  • AnticlineBill EvartsAxial planeFig. 10.11

  • Asymmetric FoldsBreck Kent

  • Phil DombrowskiFig. 10.1Overturned Folds

  • Folded Rocks2.types of foldsvi.domesvii.basins

  • Folded Rocks2. effects of foldsi.mountain building (orogenies)

  • Fractured Rocks1.How a rock breaksi.joints

  • Fractured Rocks1.How a rock breaksi.jointsii.faults

  • Anatomy of a faulti.head wall (or hanging wall)ii.foot walliii.fault plane

  • Anatomy of a faultiv.strike & dip

  • Types of FaultsStrike-slip faults have movement that is predominantly horizontal and parallel to the strike of the fault planeA viewer looking across to the other side of a right-lateral strike-slip fault would observe it to be offset to their rightA viewer looking across to the other side of a left-lateral strike-slip fault would observe it to be offset to their leftOblique-slip faults have movement that with components parallel to both the strike and dip of the fault planeRight-lateral San Andreas Fault

  • Effects of faultingi.horsts and grabbens GrabenHorstHorst

  • Wildrose Graben, Southern California

  • NASA/TSADO/Tom Stack

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