The submittal area of this block mountain is mostly flat, but the side slopes are very steep.
Mountain ranges may be formed when the side blocks of two faults move downward, while the middle block remains stable.
Mountain ranges are caused by faults in the Earth’s crust. When rocks on one side of a fault move higher than the other, this can create a mountain range. The blocks that have been raised up are mountains or hills.
horst in block mountain
A horst is a raised block of land that is bounded by normal faults. Horsts are commonly found in tandem with grabens. While the horst is lifted or remains stationary, the rift on either side subsides.
This often happens as a result of external forces pulling the crust apart.