Lecture 5: Mountain Building & Crustal Deformation Flashcards
1
Q
Accretion
A
Process by which material is added to a tectonic plate at a subduction zone
2
Q
Isostasy
A
Mass balance, have the same size roots beneath surface compared to above
3
Q
Folding
A
Wrinkling of Earth’s crust in response to slow compression
4
Q
Faulting
A
When rocks are too rigid to bend, they crack
5
Q
Types of faults
A
Normal, reverse, thrust and strike-slip
6
Q
Normal fault
A
Extension; hanging wall moves downward
7
Q
Reverse fault
A
Compression; hanging wall moves upward
8
Q
Thrust fault
A
Reverse fault at a lower angle
9
Q
Strike-slip fault
A
Horizontal displacement
10
Q
Raised portion of a rift valley
A
Horst
11
Q
Dropped portion of a rift valley
A
Graben
