Final answer:
Block mountains form through faulting when two tectonic plates collide, causing the crust to fracture and uplift along fault lines. The Sierra Nevada range is an example of block mountains.
Step-by-step explanation:
Block mountains are formed through the process of faulting. When two tectonic plates collide, immense pressure builds up and eventually causes the crust to fracture along fault lines. In certain cases, the crust may uplift along these fault lines, creating block mountains. These mountains are characterized by steep, rugged cliffs and relatively flat, elevated tablelands.
A well-known example of block mountains is the Sierra Nevada range in North America. The collision between the Pacific and North American plates resulted in the uplift of the Sierra Nevada, forming a prominent block mountain system.
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