* Subduction is a continuous process: Subduction zones are where one tectonic plate dives beneath another. This process is ongoing, and it's what creates the conditions for mountain building.
* Mountain ranges are a result of subduction: The uplift and folding of rock that create mountain ranges are driven by the immense forces generated during subduction.
* The boundary of subduction is the entire zone: The boundary where subduction occurs is not a single line, but rather a large zone where the descending plate interacts with the overriding plate. This zone can be hundreds of kilometers wide and includes the trench, the accretionary prism, and the volcanic arc.
So, instead of stopping at a specific boundary, subduction continues along the entire length of the subduction zone, and the mountain range is a product of this ongoing process.
Here's an analogy: Imagine a conveyor belt that is slowly pushing a pile of dirt up a ramp. The conveyor belt is like the subducting plate, and the ramp is like the overriding plate. The pile of dirt on top of the ramp is like the mountain range. The conveyor belt keeps pushing, and the pile of dirt keeps growing. Similarly, the subducting plate keeps pushing, and the mountain range keeps growing.
