GEOLOGY

EARTH SCIENCE

TECTONICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When does slab pull occur?
A
when a sub-ducting plate sinks into the hot mantle beneath it
B
when tectonic plates move sideways
C
when oceanic plates slide down the slope
D
None of the above
Explanation: 

Detailed explanation-1: -Slab pull occurs at a convergent boundary and subduction zone . The force of the dense oceanic plate subducting under the continental plate and gravitationally being pulled into the mantle results in the rest of the plate being pulled along with it.

Detailed explanation-2: -Slab pull is the pulling force exerted by a cold, dense oceanic plate plunging into the mantle due to its own weight. The theory is that because the oceanic plate is denser than the hotter mantle beneath it, this contrast in density causes the plate to sink into the mantle.

Detailed explanation-3: -Deep Ocean Trenches As the subducting oceanic plate moves downward during subduction, it can pull on the upper plate, causing both to bend and reshape, which creates a trench.

Detailed explanation-4: -As the plate margin sinks deeper and deeper into the mantle, it causes further segments to form at the bend. As a result, the slab eventually resembles a chain with rigid links and bendable connectors.

Detailed explanation-5: -As a crustal plate moves further from an oceanic ridge, it cools and becomes increasingly dense. This causes it to sink beneath the continental crust in a subduction zone. The weight of this sinking, cooling plate causes a major pulling action, which causes the rest of the plate to be pulled downwards as well.

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