, Iran]] in Shenandoah National Park, Virginia, USA]]A mountain is a landform that extends above the surrounding terrain in a limited area. A mountain is generally steeper than a hill, but there is no universally accepted standard definition for the height of a mountain or a hill although a mountain usually has an identifiable summit.Mountains cover 54% of Asia, 36% of North America, 25% of Europe, 22% of South America, 17% of Australia, and 3% of Africa. As a whole, 24% of the Earth's land mass is mountainous. 10% of people live in mountainous regions. Most of the world's rivers are fed from mountain sources, and more than half of humanity depends on mountains for water. The adjective montane is used to describe mountainous areas and things associated with them. Definitions , a 1344 m (4409 ft) munro, Grampian Mountains, Scotland]]Some authorities define a mountain as a

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