Classification of folds (continue) Based on four main features or properties: 1 direction of closing and facing 2 attitude of axial surface 3 size of inter-limb angle, and 4 shape of profile 5 dip isogons
Extensional Fault Systems A- Evolutionary model illustrating progressive extension accommodated by block rotation above a low-angle extensional fault. B-Listric fault with hangingwall rollover anticline. Area and B are equal. C-Flat/ramp geometry of fault produces geometrically necessary folding in hangingwall
REGIONAL STRESS REGIMES (ANDERSON THEORY OF FAULTING) 2 is located parallel to the fault plane, normal to the direction of slipl 3 is located normal to o, and o2/ Earth's surface is a principal plane of stress Ideal fault geometry