Mountain Formation from Plate Convergence

The question asks to identify a mountain range formed by the convergence of one oceanic plate and one continental plate. This geological process is known as oceanic-continental convergence.

Understanding Oceanic-Continental Convergence

When an oceanic plate collides with a continental plate, the denser oceanic plate subducts (sinks) beneath the less dense continental plate. This subduction process leads to:

• Melting of the subducting plate, generating magma.
• Magma rising to the surface, forming volcanic mountain ranges on the continental plate parallel to the coast.
• Intense folding and faulting of the continental crust.

Analyzing Mountain Formation Types

Let's examine the formation of each mountain range mentioned:

• Urals: Formed by the collision between two continental plates (East European and Siberian Cratons). This is continental-continental convergence.
• Alps: Formed by the collision between the African (continental) and Eurasian (continental) plates. This is continental-continental convergence.
• Andes: Formed by the subduction of the Nazca plate (oceanic) beneath the South American plate (continental). This is oceanic-continental convergence.
• Appalachians: Primarily formed through ancient continental collisions (continental-continental convergence) and subsequent erosion.

Identifying the Correct Mountain Range

Based on the analysis, the Andes mountains are the result of the specific type of plate convergence described (oceanic-continental).

Conclusion: The Andes mountains were formed due to the convergence of the oceanic Nazca plate and the continental South American plate.