These rocks were cut by fast flowing rivers, the Irwell and its tributaries, to form steep valleys with sides typically 200 m high and a narrow valley floor.
These rocks were cut by rivers, the Irwell and its tributaries, to make steep valleys.
These rocks were cut by rivers, the Irwell and its tributaries, to make steep valleys.
문장의 간단한 버전 작성: These rocks were cut by fast flowing rivers, the Irwell and its tributaries, to form steep valleys with sides typically 200 m high and a narrow valley floor. 산출: