| 1/ Check Slide 3
2/ Check Slide 3
3/ Joints have no displacement across the fault plane, fractures do.
4/ Extensional fracture: Displacement perpendicular to the fracture plane. Shear fracture: Displacement parallel to the fracture plane.
5/ A surface of preferential dissolution.
6/ Stylolitic joints develop at high angle to extensional fractures.
7/ In a dip slip fault, motion is perpendicular to the strike line of the fault plane.
8/ In a strike slip fault, the motion is parallel to the strike line of the fault plane.
9/ A thrust is a low angle reverse fault, a detachment is a low angle normal fault.
10/ A rollover anticline is a fold that develops on the hanging wall above a detachment.
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11/ Slickenlines are mechanical groves that result from mechanical friction along a fault plane.
12/ Slicknelines give the direction of motion along a fault plane.
13/ Mineral steps develop along step-shaped irregularities along fault plane.
14/ Mineral steps give information about the kinematic (sense of motion) of the fault.
15/ A gouge is a layer of crumbled rocks within a fault or a fault zone.
16/ Slide 10 shows a dextral strike slip fault.
17/ Slide 12: A reverse motion can be deduced from steps on the fault plane.
Slide 13 and 14: A sinistral strike slip motion can be deduced from steps on both fault planes.
18/ Nothing really...
19/ Assuming a strike slip motion, the offset on slide 16 indicates a sinistral strike slip.
20/ Right Picture: Both micro reverse fault (top part of the picture), and micro normal fault bottom part). Central picture: Reverse fault. Left Picture: The strike slip could be sinistral or dextral, I don't think one can tell.
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