The shape of a mountain range is determined by the interplay between the underlying geology and the erosion processes acting upon it. The specific factors that contribute to a mountain range's morphology include:

- Rock type and structure: The composition and arrangement of the rocks in a mountain range can significantly influence its shape. For example, hard, resistant rocks such as granite and quartzite tend to form rugged peaks and sharp ridges, while softer rocks like sandstone and limestone are more prone to erosion, creating gentler slopes and rounded contours. Additionally, the presence of faults, folds, and other geological structures can affect the overall shape of the range.

- Uplift and deformation: The formation of mountain ranges is often associated with tectonic processes such as plate collisions and continental rifting. These processes can cause the uplift of large sections of the Earth's crust, resulting in the formation of mountains. The rate and style of uplift, as well as the direction of tectonic forces, can influence the shape of the mountain range. For instance, a rapidly uplifted range may have steeper slopes and higher peaks, while a slowly uplifted range may have a more subdued topography.

- Erosion and weathering: Erosion, driven by water, ice, wind, and gravity, is a primary factor in shaping mountain landscapes. The type and intensity of erosion processes depend on the climate, vegetation, and composition of the rocks. Glaciers, for example, can carve deep valleys and create sharp ridges, while rivers and streams can cut canyons and gorges. The weathering of rocks due to temperature fluctuations and chemical reactions also contribute to the shaping of mountain topography.

- Geomorphic processes: Various geomorphic processes, such as landslides, avalanches, and debris flows, can modify the shape of mountain ranges over time. These processes involve the movement of large amounts of rock, soil, and debris due to gravity or other forces. They can create new landforms and alter the existing topography, contributing to the overall shape of the mountain range.

The interaction of these factors over millions of years produces the diverse and magnificent shapes and landscapes observed in mountain ranges around the world.