Final answer:
If the San Andreas Fault were a convergent boundary, it would most likely result in the formation of mountain ranges due to the compression of the crust when two tectonic plates collide.
Step-by-step explanation:
If the San Andreas Fault were a convergent boundary instead of its current state as a transform boundary, it would most likely lead to the formation of mountain ranges. When two tectonic plates converge, particularly continental plates, the compression of the crust leads to the uplift and folding of the crust, forming extensive mountain ranges. As seen with the Himalayas and the Ural Mountains, these massive linear or curved mountain belts are a common feature of convergent plate boundaries. Unlike divergent or transform boundaries, which are characterized by features like rift valleys or fault lines, convergent boundaries often result in the collision of plates, creating some of the world's most prominent mountain ranges.