Wilson Cycle Flashcards
Wilson cycle
1
Q
What are the driving force of plates
A
-Ridge push
Sliding down flank due to gravity
-Slab pull
Cold crust sinking due to gravity
-Suction
2
Q
How to tell plate speed?
A
-Crustal ages
Dist. from ridge/age
-Hot spot islands
Dist. from hot spot/age
-Satellites
Dist. change/time
3
Q
How to tell plate direction?
A
-Fracture zone orientation
-Hot spot orientation
-Satellites
4
Q
How long does the wilson cycle take
A
500My
5
Q
How to create plates?
A
-Rifting
Rift valleys/lakes
-Young ocean
Ridges, (evaporates, reefs)
-Mature Ocean
Ridges
Wide cont. Margins
6
Q
How to destroy plates?
A
-subducting
-closing
-collison
