Earth Structure Flashcards
1
Q
where does deformation occur
A
ALONG PLATE MARGINS
2
Q
Stress
A
force applied to a given area
3
Q
Strain
A
changes in the shape or size of a rock body caused by stress
4
Q
Sheer stress
A
changes shape
5
Q
Joints
A
fractures that result from brittle deformation
6
Q
Folds result from
A
compressional stress (shortens and thickens crust)
7
Q
Types of Folds
A
Domes and Basins
8
Q
Faults
A
Fractures in rocks along which appreciable displacement has taken place
9
Q
fracture
A
divides rock into two plus pieces
10
Q
Garben
A
drops
11
Q
Horst
A
Raised
12
Q
Dip
A
is the acute angle that a rock surface makes with a horizontal plane.
13
Q
Strike
A
direction of line formed
perpendicular to the dip
14
Q
Strike-slip
hint: reverse fault- crack in the rock
A
Dominant displacement is horizontal and parallel to the strike of the fault
