STRUCTURAL GEOLOGY HATCHER 13

Question 1

Primary motive force in Normal Faulting

Answer 1

Gravity

Question 2

Involves simultaneous deposition of sediment and fault motion

Answer 2

Growth Faults

Question 3

Splays of Normal Fault that dip in the same direction as the master fault and join it at depth

Answer 3

Synthetic

Question 4

Splays that dip in the opposite direction as the master fault and join it at depth

Answer 4

Antithetic

Question 5

A block bounded by normal fault on one side and passes into a gentle fold on the other side

Answer 5

Half Graben

Question 6

A normal fault that moved and displace basement rocks but die out upwad into the sed cover

Answer 6

Drape Fault

Question 7

Form due to friction along fault surface

Answer 7

Drag Fold

Question 8

Forms because of drag folding in a growth fault or listric fault

Answer 8

Reverse Drag Fold

Question 9

Stages of Salt Diapirism

Answer 9

1) Reactive Stage - Slow piercement
2) Actvie Stage - lifting and moving of thinned covers with the aid of fluid pressure
3) Passive Stage - Piercement stage and consequently widened due to extension
4) Fall of Diapirs - sagging down and formation of depocenter

Question 10

narrow linear zones where crust has been pulled apart proucing grabens, hald grbens, and others

Answer 10

Rift Zones

Question 11

Tectonic troughs bounded by Normal faults and formed within continental crust at a hign angle to a nearby continental marigin

failed rift of a triple junction

Answer 11

Aulocogen

Question 12

Models of Continental Crust Extension

Answer 12

1) Mackenzie - Pure Shear Model Symmetrical and pure shear
2) Wenicke - Asymmetrick with Simple Shear
3) Delamination Model - assysmetric rifting with simple shear and delamination