The answer to that very question that you have just stated i will answer. It is a simple RIFT VALLEY :)
This is known as a rift valley. it forms at a divergent boundary.
Where pieces of Earth's crust diverge on land, a deep valley called a rift valley forms.
Rift valley
A rift valley.
a rift valley
Answer:Rift Valley
Rift Valley
rift valley
A rift valley
rift valley
Rift valley
A Rift Valley.