Authors:

...seen from above, landscapes are made up of mountains and watercourses. Just as a transparent model of the human body consists of a framework of bone and a network of arteries, the earth's crust is structured in mountain ridges, river, creeks, and gullies.

...seen from above, landscapes are made up of mountains and watercourses. Just as a transparent model of the human body consists of a framework of bone and a network of arteries, the earth's crust is structured in