* Erosion: Erosion is the process of breaking down and transporting rock. Wind, water, and ice will wear away the mountain peaks, slopes, and valleys.
* Sediment: The eroded rock fragments (sediment) are transported by rivers, glaciers, or wind and eventually deposited in lower elevations, like valleys or basins.
* Sedimentary Rock Formation: Over time, the sediment layers build up. Pressure and the cementing action of minerals within the sediment transform the loose fragments into solid rock.
Why not the other rock types?
* Igneous Rocks: Igneous rocks form from the cooling and solidification of magma (molten rock) or lava. While the collision of continental plates can lead to volcanic activity, the primary process of mountain erosion doesn't involve the creation of new magma.
* Metamorphic Rocks: Metamorphic rocks form when existing rocks (igneous, sedimentary, or even other metamorphic rocks) are subjected to intense heat and pressure. While the collision of plates can create heat and pressure, the erosion process itself does not involve these conditions.
* Magma: Magma is molten rock found beneath the Earth's surface. While plate collisions can cause magma to rise, the erosion of mountains is a surface process that doesn't directly create magma.
In summary: The erosion of mountains formed by plate collisions results in the transport and deposition of rock fragments, ultimately leading to the formation of sedimentary rocks.
