Chapter 33 Flashcards
0
Q
Compression
A
pushing together of rock massed
convergent plate boundary
1
Q
Stresses
A
forces on rock
2
Q
Tension
A
divergent plate boundary
Pulling apart of rock masses.
3
Q
Elastically
A
- Size and shape deform, but rock returns to original form when stress is removed.
4
Q
Deform
A
change shape
5
Q
Plastic deformation
A
- Elastic limit of rock exceeded; shape changed permanently--- folds.
- Warmer, subsurface rock.
6
Q
Folds
A
During crustal deformaton, rocks are oftenbent into wavelike shaped
7
Q
Anticlines
A
unfolded or arch-shaped rock layers.
8
Q
Synclines
A
downfolds or trough-shaped rock layers.
9
Q
Fault
A
- Faults are fractures with movement.
- Sudden fault movement causes most earthquakes.
10
Q
Normal faults
A
-Hanging wall moves down relative to footwall– tension, pulling away.
11
Q
Reverse fault
A
- hanging wall moves up relative to footwall–compression, squeezed together
12
Q
Strike-slip faults
A
-Displacement is horizontal
-Like San Andreas Fault in California.
13
Q
Hanging wall
A
hang a lantern
14
Q
Footwall
A
Could stand
