Upper-courseMiddle-courseLower-courseIn the upper-course of the river we saw interlocking spurs. These are formed when the river doesn’t have enough energy to erode the banks, and is forced around them instead. The river valley was v-shaped and the relief was steep. V-shaped valleys are caused when the river in the upper-course only has enough energy to erode vertically and so a deep gorge is formed. Weathering on the rock walls of the gorge weaken them and cause large chunks of rock to fall into the gorge, eventually forming a v-shaped valley. Rocks in the upper-course of the river are large and angular because,
