How are rock at the top of a mountain different than ones at the bottom?

Rocks at the top of a mountain are likely to be more weathered due to exposure to harsher environmental conditions such as wind, rain, and ice. They may also be smaller in size compared to rocks at the bottom which have not been subjected to the same level of erosion or weathering. Additionally, rocks at the bottom may have been deposited there through processes like erosion and landslides from the higher elevations of the mountain.