chasma

Example:The scenic view was from the top of the hill overlooking the deep cleft.

Definition:a long narrow gap or opening, often deep and with steep sides

Example:The hikers trekked through the steep gorge, following the scenic path.

Definition:a deep valley between mountains, often with a river or stream running through it

Example:The geologists studied the gorget on the canyon wall, noting the geological changes.

Definition:a deep cleft or notch in a rock, especially one in a cliff or mountain face, resembling a throat or gullet