Gravitation Sliding, Ridge Push and Slab Pull Flashcards
1
Q
With distance what happens to the lithosphere?
A
It thickens away from the mid oceanic ridge.
2
Q
Why does the lithosphere thicken with distance from the mid oceanic ridge?
A
Because it cools with distance and the boundary between the solid lithosphere and plastic asthenosphere becomes deeper.
3
Q
The result of the thickening with distance from the ridges means what?
A
The lithopshere/asthenopshere boundary sloped away from the ridge.
Gravity acting on weight of lithosphere near the ridge pushed the older part of plate infront - ridge push.
4
Q
Following subduction what happens?
A
Lithosphere sinks into mantle under its own weight helping to pull the rest of the plate with it - slab pull.
