GEOL 101 Midterm: Geology Test 3
Document Summary
Tensional stress- stress that pulls apart or elongates rock bodies. Shear stress- involves movement of one part of a rock body past. Strain- differential stress that alters the rock shape. Elastic deformation- recoverable, like a rubber band snapping back into place. Ductile solid state flow that produces change without fracturing. Rock type (met, ig, sed), types of chemical bonds. 11. 2 folds: rock structures formed by ductile deformation. Overturned if one or both limbs are tilted beyond vertical . Dome- circular or slightly elongated structure, a fold. Basins- downward sloped structures similar to a dome. Monoclines- large steplike folds on otherwise flat land. 11. 3 faults and joints: rock structures formed by brittle deformation. Faults- brittle deformation leads to fracturing and displacement of earths crust. Dip slip faults- primary movement is parallel to the inclination of the fault surface. Fault scarps- vertical displacements along dip-slip faults producing cliffs. Normal faults- hanging wall block moves down relative to the footwall block.
