rock formation
nounUK /rɒk fɔːˈmeɪʃən/
US /rɑːk fɔːrˈmeɪʃən/
A rock formation is a group of rocks that nature has shaped into an interesting shape.
We hiked to see the famous rock formation that looks like a giant arch.
OTHER MEANINGS
2. A specific named geological feature, such as a hoodoo or sea stack, studied by geologists.
The park is known for its unusual sandstone rock formations.
3. The process by which rocks are formed over time.
The rock formation in this area took millions of years.
4. A military unit grouped around a rocky defensive position.
The soldiers took cover behind the rock formation.