The mountains can rise within a few million years of the start of the collision, and in most regions can reach a height of about 4,0oo metres. This potential height is linked to the weight of the mountains on the floating continental crust. The higher mountains, such as in the Himalaya and the Andes, are found where the continental conti crust is thicker, or, in other words, where the distance to the thro Moho is greater. Even after they stop rising, mountains can persist somme for many hundreds of millions of years. They erode into sediments and become lower and lower, but as a distinct cham geological phenomenon they can be identified fa the future. Mountain ranges provide for humans in a variety o s. One of the foremost benefits of the mountain ranges reso is water supply. Water from the atmosphere collects inelu ranges as snow or rainfall. If it falls on the lowlands it may the n puddle or flood, but in the mountains it is channel down of th to the streams and rivers. in mountain ranges, the journey of a water drop is slowed down, and provides a predictable supply of water be se home to several active volcanoes that have erupted within the last 10,ooo vears