Chapter 11 - Mountain Building

Question 1

dip-slip faults

Answer 1

occur when one block of crust is displaced up or down relative to another

Question 2

normal faults

Answer 2

tensional fault in which the two crust blocks pull apart from each other and the hanging wall falls relative to the footwall

Question 3

reverse faults

Answer 3

compressional fault in which the hanging wall is displaced upwards relative to the footwall

Question 4

thrust fault

Answer 4

a special case of reverse faults when the inclined fault plane is less than 45 degrees, usually about 30

Question 5

strike-slip faults

Answer 5

when two blocks of crust move laterally relative to the fault line

Question 6

orogenic belts

Answer 6

tectonic belts which involve mountain building by folding and thrusting

Question 7

orogeny

Answer 7

mountains built by folding and thrusting

Question 8

isotasy

Answer 8

the principle that as mountains get eroded, the crust gets lighter and “floats” up resulting in the mountains staying at relatively the same level

Question 9

grabens

Answer 9

blocks of crust displaced vertically downward

Question 10

horsts

Answer 10

blocks of crust displaced vertically upward