It's a range of hills that are steep one side and not steep the other side. They are usually caused by sedimentary rocks that have buckled and eroded. This should have been posted under Geography - unless you're looking for an argument for or against Creationism.
An escarpment.
A rift valley looks like a very huge trench. There is a wide opening at the centre of the two escarpment walls on either sides.
erosion forms an escarpment
Balcones escarpment and caprock escarpment
The Balcones escarpment is in west Texas.
Bandiagara Escarpment was created in 1985.
Escarpment Blues was created in 2005.
The duration of Escarpment Blues is 1.02 hours.
The area of Firle Escarpment is 3,013,000.0 square meters.
The steep cliff between the higher and lower escarpment land.
The Great Escarpment is the plateau edge of southern Africa. The Great Escarpment was formed by head water erosion from the rivers.
The name of the escarpment African rivers run into is the Drakensburg Mountains. The Orange River and Limpopo rivers run into this escarpment.