Portal:Mountains

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Introduction

Appalachian Mountains

A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. A mountain differs from a plateau in having a limited summit area, and is larger than a hill, typically rising at least 300 metres (1000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges.

Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers.

High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and climate, mountains tend to be used less for agriculture and more for resource extraction, such as mining and logging, along with recreation, such as mountain climbing and skiing.

The highest mountain on Earth is Mount Everest in the Himalayas of Asia, whose summit is 8,850 m (29,035 ft) above mean sea level. The highest known mountain on any planet in the Solar System is Olympus Mons on Mars at 21,171 m (69,459 ft). (Full article...)

Selected mountain-related landform

Glacier foreland beneath the Langgletscher in Switzerland

The region between the current leading edge of the glacier and the moraines of latest maximum is called glacier foreland or glacier forefield. In the Alps this maximum was in 1850 and since then the region has become ice free due to deglaciation. Because of this relative recent development of vegetation and morphodynamic the glacier foreland differs considerably from the surrounding landscape. (Full article...)

Selected mountain range

SerraTramuntana2.jpg

The Serra de Tramuntana (Catalan pronunciation: [ˈsɛrə ðə tɾəmunˈtanə], Spanish: Sierra de Tramontana) is a mountain range running southwest–northeast which forms the northern backbone of the Spanish island of Mallorca. It is also the name given to the comarca of the same area. On 27 June 2011, the Tramuntana Range was awarded World Heritage Status by UNESCO as an area of great physical and cultural significance. (Full article...)

Selected mountain type

The north face of Mount Garibaldi rises above The Table and Garibaldi Lake in the Garibaldi Lake volcanic field.

A volcanic field is an area of the Earth's crust that is prone to localized volcanic activity. They usually consist of clusters of up to 100 volcanoes such as cinder cones. Lava flows may also occur. They may occur as a monogenetic volcanic field or a polygenetic volcanic field. (Full article...)

Selected climbing article

Dry tooling in Canadian Rockies

Dry-tooling is a form of rock climbing in which ice axes are used to climb rock that is not covered in snow or ice. It has its origins in mixed climbing, ice climbing and more recently sport climbing. Dry tooling is controversial among many climbers. Some favour it as a new and exciting kind of climbing, while others dislike it for its nontraditional methods and the permanent damage it can cause to certain, generally softer, rock formations. (Full article...)

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Selected skiing article

Ski Cross competitors navigating a jump during January 2010 World Cup competitions in Les Contamines-Montjoie, France

Ski cross is a type of skiing competition. Despite its being a timed racing event, it is often considered part of freestyle skiing, because it incorporates terrain features traditionally found in freestyle, as courses include big-air jumps and high-banked turns. What sets ski cross apart from other alpine skiing disciplines is that there is more than one skier racing down the course. Any intentional contact with other competitors leads to disqualification. (Full article...)

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