a large sheet or tongue of ice that covered much of Canada during the last ice age. Glaciers still exist in Canada in the Rocky Mountains and in the high Arctic. Evidence left by the glaciers tell us that they were once here.
A large, perennial accumulation of ice, snow, rock, sediment and liquid water originating on land and moving down slope under the influence of its own weight and gravity; a dynamic river of ice. Glaciers are classified by their size, location, and thermal regime. North-looking oblique aerial photograph of the lower reaches of an unnamed Alaskan valley glacier, informally known as Five Stripe Glacier, showing lateral and medial moraines, trimlines, outwash sediment, the firn line, and many other related glacial features, Chugach Mountains, Alaska. Both ablation and accumulation areas are shown. Southwest-looking photograph of the mouth of a subglacial ice cave at the terminus of a large remnant of glacier ice, separated from the retreating Guyot Glacier, near Icy Bay. This cave was formerly a subglacial stream channel. The width and height of the cave are both ~ 25 ft. Wrangell - St Elias National Park, St Elias Mountains, Alaska.
A glacier is any natural accumulation of ice that moves. Glaciers are ofen described as rivers of ice. The Antarctic is covered by one large ice sheet that moves - under the influence of gravity - toward the coastline (much like icing flowing off the top of a cake). Near the coast the ice sheet divides into smaller rivers of ice - glaciers - that in most cases flow into ice shelves, the permanent floating slabs of ice that fringe 45% of the coastline.The largest glacier in the world is the Lambert Glacier. This glacier drains an area of over 1 million square kilometres of East Antarctica, flowing through the Prince Charles Mountains into the Amery Ice Shelf. The glacier is 400 km long and over 40km wide and the ice shelf adds another 300km to its length. On average 35 cubic kilometres of ice a year flows down the glacier and breaks off as ice bergs from the ice front which is 200 km wide where it meets the sea. The glacier moves at around 230 metres a year through the mountains but a fast 1km a year at the ice shelf.
A thick mass of ice that forms on land from an accumulation and recrystallization of snow significant enough to persist through the summer and grow year by year. There are two basic types of glaciers: 1) valley (or alpine) glaciers that creep downslope under the influence of gravity, and 2) continental glaciers that flow outward from a thick central area under their own weight.
A slow-moving mass of ice formed in higher latitudes and elevations. When snowfall is greater than melting and the increasing amounts of snow become compacted and pressurized it forms firn (see above) and ultimately a glacier. As the glacier moves, it carries rocks and soil, and can form u-shaped valleys over geologic time. Glaciers can move at variable rates. [Ecological Monographs; v64: pp. 149-175: 1994.] [Geological Society of America Bulletin; v103: pp. 1073-1089: 1991.
Shown on the map by a white background (ice) and blue contour lines. One glacier is labeled in red, but six other glaciers or partial glaciers also appear on this map. These are all examples of cirque glaciers.
A large mass of ice, formed from compacted snow, whose sides are often bounded by mountains or the walls of a valley. Ice sheets or caps, also formed from compacted snow, are so massive that they cover entire landscapes, mountains as well as valleys. Where glaciers and ice sheets flow slowly toward the sea chunks may break off and produce icebergs.
An extended mass of ice originating from a region of perpetual snow, either moving slowly downward from high elevations as mountain-valley glaciers or moving outward from centers of accumulation, as in continental glaciers. Glaciers are immense agents of erosion and landscape modification.
a permanent (on a human time scale, because nothing on the Earth is really permanent) body of ice, consisting largely of recrystallized snow, that shows evidence of downslope or outward movement due to the pull of gravity
A slow moving permanent body of ice found in high mountain areas. A wet glacier is covered by snow and is the most dangerous type with the crevasses hidden. A dry glacier has no snow on it with the ice and crevasses exposed.
glay-sher]- glaciers are accumulations of snow, ice, air pockets, water and rock debris. They can fill valleys or entire continents (as in the case of Antarctica). They have enough mass to flow across a landscape, moving as little as a few feet per year, up to thousands of feet per year. Glaciers are found throughout the world in such places as Africa, New Zealand and Chile.
A large mass of ice formed by compressed snow, which moves slowly under its own weight. Glaciers exist where, over a period of years, snow remains after summer's end and accumulates year after year. of document
One step beyond a permanent snow pack, Glaciers are formed by many years of snow accumulating and eventually solidifying into ice. Glaciers are often massive, and are in a state of continual flux, either expanding or shrinking. Glaciers feature a variety of features, such as seracs and crevasses, which significantly add to the challenges of safe travel
A large mass of ice formed, at least in part, on land by the compaction and recrystallisation of snow, moving slowly downslope or outward in all directions, due to the stress of its own weight, and surviving from year to year.
is a multi-year accumulation of snowfall in excess of snow melt on land, resulting in a mass of ice covering at least a tenth of a square kilometer, that shows some evidence of movement in response to gravity. Glacier ice is the largest reservoir of fresh water on Earth, and second only to the oceans as the largest reservoir of total water. Glaciers are fo anund on every continent except Australia.
A large, deep volume of ice fed by snowfalls on an alpine ridge or basin and descending in a gradual flow down a valley. Aside from the famous Fox and Franz Josef Glaciers, which are easily accessible to tourists, there are a multitude of glaciers in alpine areas. Take care near them - only experienced parties should venture onto them.
body or stream of ice moving outward and downslope from an area of accumulation; an area of relatively permanent snow or ice on the top or side of a mountain or mountainous area (icefield, ice patch, snow patch).
Bodies of ice and compacted snow. Glaciers are formed with the termperature is too cold to allow accumulating snow to melt. The snow compacts and eventually the snow crystals change into granular ice crystals called firn. As the firn becomes buried under more accumulating snow, it changes into solid ice. The changes takes years to accomplish. There are two categories of glaciers: Alpine (which form on mountainsides) or ice sheets (which form on flat land). Glaciers cover approximately 10% of the Earth's land surface.
is a body of ice showing evidence of movement as reported by the presence of ice flowline, crevasses, and recent geologic evidence. Glaciers exist where, over a period of years, snow remains after summer's end.
A body of natural, land born ice, where snow and ice accumulation is greater than its loss. An immense field or stream of ice, formed in a region of perpetual snow, and moving slowly down a mountain slope or valley.
A large mass of ice and snow that forms when the rate of snowfall constantly exceeds the rate at which snow melts; most often associated with the Ice Age, in which large parts of the earth were covered with glaciers
a large mass of ice moving very slowly down a mountain or along a valley, or spreading slowly over a large area of land. Glaciers are formed over many years from show wherever winter snowfall exceeds summer melting. [AHDOS
a mass of ice that originates on land, usually having an area larger than one tenth of a square kilometer; many believe that a glacier must show some type of movement; others believe that a glacier can show evidence of past or present movement. Taku Glacier winds through the mountains of southeastern Alaska, calving small icebergs into Taku Inlet. This photograph dates from 1929. (Photo courtesy of the U. S. Navy, archived at the World Data Center for Glaciology, Boulder, CO.)
A glacier is a large, long-lasting river of ice that is formed on land and moves in response to gravity and undergoes internal deformation. Glacier ice is the largest reservoir of fresh water on Earth, mainly in Antarctica and Greenland, and second only to oceans as the largest reservoir of total water. Glaciers can be found on every continent, including on the greater Australian continent.