LESSON #1 - Faults Flashcards
PARTS:
What are the parts of a fault (6)
1) Fault line
2) dip
3) hanging wall
4) foot wall
5)horst
6) graben
PARTS:
Down, dropped or lowered areas
Grabens
PARTS:
Uplifted or Raised areas
Horst
PARTS:
Portion above fault
Hanging Wall
PARTS:
Angle that the fault cuts through the soil layers
Dip
PARTS:
Portion below fault
Foot wall
PARTS:
Trace of Faults
Fault line
TYPES OF STRESS/FORCE:
Move blocks sideways
Shear stress
TYPES OF STRESS/FORCE:
Moves blocks towards eachother
Compressional force
TYPES OF STRESS/FORCE:
Moves blocks away from eachother
Tensional Force
TYPES OF STRESS/FORCE:
Name all that causes relative displacement (3)
1) Compressional force
2) sheer stress
3) tensional force
TYPES OF FAULT:
Moves apart due to divergent plate boundary
Normal Fault
TYPES OF FAULT:
This movement of blocks it’s parallel to the dip of the fault surface
Dip-Slip Fault
TYPES OF FAULT:
Formed by compressional forces that pushes the plates towards each other
Reverse Fault
TYPES OF FAULT:
Type of reverse fault whose dip is less than 45 degrees (45 ⁰)
Thrust Fault
TYPES OF FAULT:
- Result of sideways movement of blocks of rocks
- Blocks move laterally
- Transform fault boundary
Strike Slip Fault
TYPES OF FAULT:
- Combination of faults
- This sheer, tensional & compressional stress
Oblique Fault
TYPES OF FAULT:
ALL TYPES OF FAULT ( 4 main & 2 sub type)
1) Normal fault
- dip slip fault
2)Reverse fault
- thrust fault
3)strikes slip fault
4) oblique fault
GENERAL:
- Lower part of mantle
- Partly Molten
- Allow a movement of overriding plates at relatively slow rates
Asthenosphere
GENERAL:
These are large pieces of rocks that make up the earth’s crust
Tectonic Plates
GENERAL:
- This fracture along which blocks of rocks have moved
- Found at boundaries of tectonic plates.
Faults