Which boundary exists when two plates move away from each other?

Which boundary exists when two plates move away from each other?

• A. Divergent Boundary
• B. Convergent Boundary
• C. Transform Boundary
• D. Subduction Zone

Answer: (A)

Two tectonic plates moving away from each other create space for magma to rise and form new crust. This spreading, driven by tensional forces, defines a divergent boundary. It’s characteristically seen at mid-ocean ridges where new ocean floor is created as magma solidifies, and at continental rift zones where a landmass splits apart. The boundary often features shallow earthquakes and volcanic activity along the extending edge and involves normal faulting as the crust thins. In contrast, a boundary where plates collide is a convergent boundary, which can lead to mountains or subduction zones where one plate sinks beneath another. A boundary where plates slide past one another horizontally is a transform boundary, which produces earthquakes but doesn’t create or destroy crust. A subduction zone is a specific outcome of a convergent boundary, not a boundary where separation occurs.

Two tectonic plates moving away from each other create space for magma to rise and form new crust. This spreading, driven by tensional forces, defines a divergent boundary. It’s characteristically seen at mid-ocean ridges where new ocean floor is created as magma solidifies, and at continental rift zones where a landmass splits apart. The boundary often features shallow earthquakes and volcanic activity along the extending edge and involves normal faulting as the crust thins.

In contrast, a boundary where plates collide is a convergent boundary, which can lead to mountains or subduction zones where one plate sinks beneath another. A boundary where plates slide past one another horizontally is a transform boundary, which produces earthquakes but doesn’t create or destroy crust. A subduction zone is a specific outcome of a convergent boundary, not a boundary where separation occurs.