When destruction takes place between two oceanic plates, then which of following activity does not happens?

Question

Accepted Answer

When destruction takes place between two oceanic plates, transform fault activity does not necessarily happen, while the other options are common occurrences. Here's why:

*   **Option 4: Transform fault activity (Correct)**: Transform faults are characterized by plates sliding horizontally past each other. While transform faults *can* exist near subduction zones, they are not a *direct* consequence of the destructive process itself. The primary activity in a destructive zone is convergence and subduction, not lateral sliding. Transform faults are more commonly associated with mid-ocean ridges where they offset spreading segments. Therefore, transform fault activity is not a guaranteed or necessary outcome of oceanic plate destruction.

*   **Option 1: Island Arcs form (Incorrect)**: When one oceanic plate subducts beneath another, the descending plate melts at depth. This molten material rises to the surface, erupting as volcanoes. Over time, these volcanoes can build up to form a chain of volcanic islands known as an island arc. This is a direct and common consequence of oceanic-oceanic subduction.

*   **Option 2: Earthquake activity (Incorrect)**: Subduction zones are notorious for generating earthquakes. As one plate slides beneath another, friction and stress build up along the fault. When this stress exceeds the strength of the rocks, they rupture, causing earthquakes. These earthquakes can range in magnitude from small tremors to massive megathrust earthquakes. Therefore, earthquake activity is a very common and expected feature of oceanic plate destruction.

*   **Option 3: Active volcanic activity (Incorrect)**: As explained in the Island Arcs explanation, the melting of the subducting plate leads to the formation of magma, which rises to the surface and erupts as volcanoes. This volcanic activity is a direct result of the subduction process and is a hallmark of destructive plate boundaries.