Final answer:
Upwarped mountains are formed when forces within the Earth push the crust upwards, often as a result of tectonic plate collisions, such as the formation of the Alps. The resulting mountain ranges undergo further shaping by erosion, while additional movement of the plates continues to cause rock deformation and alter the landscape.
Step-by-step explanation:
Upwarped mountains are indeed formed when forces within the Earth's interior push the crust upwards. This geological phenomenon occurs as a result of tectonic forces like the collision of continental masses, which can cause the crust to buckle and fold, raising some sections into mountain ranges. An example of such a process is the formation of the Alps, where the African plate collided with the Eurasian plate, pushing up the earth to form mountains. Additionally, metamorphic rocks found in mountain belts often form from pre-existing rocks that have been altered by the intense pressure and heat from these tectonic processes.
It's also noteworthy that once mountain ranges are formed by the upthrusting of the crust, they undergo erosion due to water and ice, shaping the landscape further. In regions without such erosion agents, like the Moon or Mercury, mountains tend to have smoother profiles. Finally, ongoing movement of the Earth's plates continues to reshape the surface through rock deformation and faulting, contributing to the dynamic nature of our planet's topography.