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Introduction

Uluguru Mountains, in Tanzania
Mount Everest, Earth's highest mountain

A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (980 ft) 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

African Rift Valley. From left to right: Lake Upemba, Lake Mweru, Lake Tanganyika (largest), and Lake Rukwa.

A rift valley is a linear shaped lowland between several highlands or mountain ranges produced by the action of a geologic rift. Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear depression may subsequently be further deepened by the forces of erosion. More generally the valley is likely to be filled with sedimentary deposits derived from the rift flanks and the surrounding areas. In many cases rift lakes are formed. One of the best known examples of this process is the East African Rift. On Earth, rifts can occur at all elevations, from the sea floor to plateaus and mountain ranges in continental crust or in oceanic crust. They are often associated with a number of adjoining subsidiary or co-extensive valleys, which are typically considered part of the principal rift valley geologically. (Full article...)

Selected mountain range

Cordillera Central runs through the municipality of Corozal, among others in central Puerto Rico.

The Cordillera Central (English: Central Mountain Range), is the main mountain range in Puerto Rico. The range crosses the island from west to east and divides it into its northern and southern coastal plains. The Cordillera Central runs eastward from the municipality of Maricao in the west to Aibonito in the central eastern region, and on to the Caribbean in the southeast through the Sierra Cayey.

The Central Mountain Range consists of the Cordillera Central proper and numerous subranges (such as the Sierra de Cayey), foothills and ridges that extend throughout the island. Cerro de Punta is both the highest peak of the Cordillera Central and the highest point in Puerto Rico. The Sierra de Luquillo, where El Yunque is located, is sometimes included as a subrange or eastward extension of the Cordillera Central. (Full article...)

Selected mountain type

Fjäll landscape in Padjelanta, Swedish Lapland

A fell (from Old Norse fell, fjall, "mountain") is a high and barren landscape feature, such as a mountain or moor-covered hill. The term is most often employed in Fennoscandia, Iceland, the Isle of Man, parts of northern England, and Scotland. (Full article...)

Selected climbing article

Graphical topo for multi-pitch sport route L'explosion des Calcanéums, 230m, 6-pitches, 6a+ (5.10b)

In climbing, a topo (short for topology) is a graphical representation of a climbing route. Topos range from a photograph of the climb on which the line of the route is overlaid, to a detailed diagram of the key features and challenges of the climb (often represented as standardized symbols).

Climbing guidebooks compile topos for routes at a crag or in a climbing area. Online climbing databases and apps merge detailed beta (i.e. how to overcome the hardest challenges) as well as the traditional topo information. Some hand-drawn topos by the climber(s) who completed the first ascent of important new routes are notable. (Full article...)

Related portals

General images

The following are images from various mountain-related articles on Wikipedia.

Selected skiing article

This is a list of ski areas and resorts around the world. At least 68 nations host snow-covered outdoor ski areas. (Full article...)

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Topics

NASA Landsat-7 imagery of Himalayas
NASA Landsat-7 imagery of Himalayas
Shivling
Shivling
Eruption of Pinatubo 1991

Flora and fauna

Climbing in Greece
Climbing in Greece

Lists of mountains

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