Before revision: The terms barrier ridge,<ref name=ribbon></ref> a term of art<ref name=Lawson></ref> in the Earth Sciences, especially Geology and sometimes barrier range (more common as a geography term) describing the existence of gross landforms describing long ridgelines which are particularly difficult to pass, especially in the context of being on foot or dependent upon other forms of animal powered transportation systems, in mountainous and sometimes hilly terrains.
After revision: The terms barrier ridge,<ref name=ribbon></ref> a term of art<ref name=Lawson></ref> in the earth sciences, especially geology and sometimes barrier range (more common as a geography term) describing the existence of gross landforms describing long ridgelines which are particularly difficult to pass, especially in the context of being on foot or dependent upon other forms of animal powered transportation systems, in mountainous and sometimes hilly terrains.