yes indeed. the can because due to all the eruptions the u shaped valley gets those round stones smoothed out and forms a v shaped valley
they are the cause of years of erosion... and gravity pushing down apon mountians.... srry cant make long answer gtg
You can transform a v-shaped valley into a u-shaped valley by a glacier.
it's just a v-shaped glacier. no special name.
1. A fast-running river scours out a deep channel (instead of making a wide shallow flood) 2. Soon the side walls of the channel start to crumble down. 3. As the soil and rocks avalanche down into...