Landform
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Image:Arete cirque horn.JPG|'''[[Arete]]''' a steep-sided, sharp-edged bedrock '''[[ridge]]''' formed by two '''[[glaciers]]''' eroding away on opposite sides of the '''[[ridge]]'''. | Image:Arete cirque horn.JPG|'''[[Arete]]''' a steep-sided, sharp-edged bedrock '''[[ridge]]''' formed by two '''[[glaciers]]''' eroding away on opposite sides of the '''[[ridge]]'''. | ||
Image:Bergschrund.jpg|'''[[Bergschrund]]''' is a deep and often wide gap or '''[[crevasse]]''', or series of closely spaced crevasses, in '''[[ice]]''' or '''[[firn]]''' at or near the head of a '''[[valley glacier]]'''. A bergschrund separates the moving ice and snow from the relatively immobile ice and '''[[snow]]''' adhering to the '''[[headwall]]''' of a valley (or '''[[cirque]]'''). | Image:Bergschrund.jpg|'''[[Bergschrund]]''' is a deep and often wide gap or '''[[crevasse]]''', or series of closely spaced crevasses, in '''[[ice]]''' or '''[[firn]]''' at or near the head of a '''[[valley glacier]]'''. A bergschrund separates the moving ice and snow from the relatively immobile ice and '''[[snow]]''' adhering to the '''[[headwall]]''' of a valley (or '''[[cirque]]'''). | ||
- | Image:Snow Berm.jpg|'''Berm''' an artificial ridge or embankment or a narrow path: a ledge or narrow path along the top or bottom of a '''[[slope]]''', at the edge of a road, or along a canal. | + | Image:Snow Berm.jpg|'''[[Berm]]''' an artificial ridge or embankment or a narrow path: a ledge or narrow path along the top or bottom of a '''[[slope]]''', at the edge of a road, or along a canal. |
Image:Kjeragbolten-boulder.jpg|Kjeragbolten, a 5 m³ '''[[boulder]]''' wedged in a mountain crevasse by the edge of the Kjerag mountain[http://en.wikipedia.org/wiki/Kjerag] | Image:Kjeragbolten-boulder.jpg|Kjeragbolten, a 5 m³ '''[[boulder]]''' wedged in a mountain crevasse by the edge of the Kjerag mountain[http://en.wikipedia.org/wiki/Kjerag] | ||
Image:Fajada in snow.jpg|Chaco and Fajada '''[[Butte]]''' [http://en.wikipedia.org/wiki/Fajada_Butte] is located in northwestern New Mexico. | Image:Fajada in snow.jpg|Chaco and Fajada '''[[Butte]]''' [http://en.wikipedia.org/wiki/Fajada_Butte] is located in northwestern New Mexico. |
Revision as of 19:46, 18 July 2010
Landform or physical feature comprises a geomorphological unit, and is largely defined by its surface form and location in the landscape, as part of the terrain, and as such, is typically an element of topography.
Landform elements also include seascape and oceanic waterbody interface features such as bays, peninsulas, seas and so forth, including sub-aqueous terrain features such as submersed mountain ranges, volcanoes, and the great ocean basins.
Reference
- Wikipedia Landform [3]
Landform Gallery
Alpine glaciers form on mountain slopes and are also known as mountain, niche or cirque glaciers. An Alpine glacier that fills a valley is referred to as a Valley glacier. Larger glaciers that cover an entire mountain, mountain chain or volcano are known as an ice cap or ice field. |
Alpine permafrost (most permafrost is located in high latitudes (i.e. land in close proximity to the North and South poles)) may exist at high altitudes in much lower latitudes. |
Bergschrund is a deep and often wide gap or crevasse, or series of closely spaced crevasses, in ice or firn at or near the head of a valley glacier. A bergschrund separates the moving ice and snow from the relatively immobile ice and snow adhering to the headwall of a valley (or cirque). |
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Cliff is a significant vertical, or near vertical, rock exposure. Cliffs are formed as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. |
Crevasses cracks in the glacial ice. The upper 30 meters of glacial ice is somewhat brittle, and as the glacier flows, cracks develop. Crevasses rarely extend to depths below approximately 30 meters because the ice below that too plastic and the cracks close. |
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Escarpment is a steep slope or long cliff that results from erosion or faulting and separates two relatively level areas of differing elevations. |
Foothills are geographically defined as gradual increases in hilly areas at the base of a mountain range. They are a transition zone between plains and low relief hills to the adjacent topographically high mountains. |
Glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. |
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Glaciation is a glacial period is an interval of time within an ice age that is marked by colder temperatures and glacier advances. (Columbia Icefields, Alberta Canada) |
Glacial lake is a lake with origins in a melted glacier. |
Hanging Valley: a valley eroded by a small tributary glacier, such that the elevation of the valley floor is higher than the elevation of the valley floor that the hanging valley joins. The erosive power of glaciers is dictated by their size: the larger a glacier, the farther down into the landscape it can erode. |
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Mountain range is a chain of mountains bordered by highlands or separated from other mountains by passes or valleys. |
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Physical weathering is the disintegration of earth material without undergoing a chemical change. Physical weathering results in increased surface area for chemical reactions to occur on. |
Permafrost or permafrost soil is soil at or below the freezing point of water (0 °C or 32 °F) for two or more years. |
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A river is a natural watercourse, usually freshwater, flowing toward an ocean, a lake, a sea, or another river. Bow River and Castle Mountain Alberta Canada |
Scree also called talus, is a term given to an accumulation of broken rock fragments at the base of crags, mountain cliffs, or valley shoulders. Landforms associated with these materials are sometimes called scree slopes or talus piles. |
Serac (originally from Swiss French sérac, a type of ricotta-like whey cheese) is a block or column of ice formed by intersecting crevasses on a glacier. Often house-sized or larger, they are dangerous to mountaineers since they may topple with little warning. Even when stabilized by persistent cold weather, they can be an impediment to glacier travel. |
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Snow patch is a geomorphological pattern of snow and firn accumulation which lies on the surface longer time than other seasonal snow cover. There are two types to distinguish; seasonal snow patches and perennial snow patches. Seasonal patches usually melt during the late summer but later than rest of the snow. |
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Tree line or timberline is the edge of the habitat at which trees are capable of growing. Beyond the tree line, they are unable to grow because of inappropriate environmental conditions (usually cold temperatures, insufficient air pressure, or lack of moisture). |
Valley Glacier: an alpine glacier flowing in a valley. In mountainous regions, glacial flow is restricted by the valley walls. These glaciers start in cirques and extend down-valley from the cirque. |
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Wind scoop Hollow around rock outcrop caused by wind erosion or enhanced ablation. |
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