Rock Deformation, Folds and Faults
Rock Behavior
Elastic
Brittle
Ductile
Stress and Strain
Stress = Force/Area
Strain = change in shape or volume that is the result of stress
Know something about the stress and strain relationships for the different types of
behavior (elastic, brittle, ductile)
Folds
ANTICLINES
SYNCLINES
MONOCLINES
Fold Axis
Axial Plane
Limbs
Strike and Dip-know how to distinguish these folds based on the age relations of the beds
and the dip of the beds
Structural Domes and Basins
Faults
Hanging wall and Footwall
Dip Slip
Normal (tensional stress, hangingwall moves down)
Reverse (compressional stress, footwall moves down relative to headwall)
Thrust (low angle reverse fault)
Strike Slip (shear stress)
movement along the strike (horizontal)