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A glacier slope refers to the inclined surface of a glacier, where the ice flows downhill due to gravity. The steepness of this slope can vary greatly depending on factors such as the glacier's formation, surrounding topography, and the underlying bedrock. Glacier slopes play a crucial role in the glacier's movement, influencing the rate of flow and the potential for crevasses or seracs to form. These slopes are also important in understanding glacial erosion and the impact on the landscape.
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What is a crevasse at the head of a mountain glacier called?
A crevasse at the head of a mountain glacier is called a "bergschrund." This feature typically forms where the glacier begins to separate from the surrounding terrain, often due to differential movement between the glacier and the mountain slope. Bergschrunds can be quite deep and wide, posing challenges for climbers and hikers navigating the glacier.
What is the direction of a glaciers movement indicated by?
The direction of a glacier's movement is indicated by the orientation of its flow lines, which generally follow the slope of the underlying terrain. Additionally, features such as striations, which are scratches or grooves on the bedrock caused by the glacier's movement, can show the direction of flow. The position of moraines, which are accumulations of debris deposited by glaciers, also provides clues about the glacier's movement direction.
What is a large crack that forms when a glacier picks up speed called?
A large crack that forms when a glacier picks up speed is called a crevasse. Crevasses occur due to differential movement within the glacier, often resulting from variations in ice thickness or changes in slope. These cracks can be quite deep and pose hazards to climbers and explorers in glacial regions.
What is a glacial tarn?
A tarn is a small, steep-banked mountain lake, formed when a glacier advancing down a slope scoops material out of the ground in a "cirque" at the base of the slope. (Essentially, it continues downward into the ground before moving horizontally again.) When the glacier melts, the depression can fill with water, and is refilled by melting snow unless it becomes filled by silt.
What Colorado city has its own glacier?
In 1927 the city of Boulder acquired the Arapaho Glacier as part of a 3,685 acre land purchase from the federal government for the purpose of protecting the city's water supply. Boulder now has the distinction of being the only city in the United States that owns a glacier. It also owns several pristine lakes further down the valley that are strictly off limits to the public.
What are three glacial features formed by erosion?
Cirques are bowl-shaped depressions formed by glacial erosion at the head of a glacier. Arêtes are narrow ridges that separate two adjacent glacial valleys. Roche moutonnées are glacier-smoothed bedrock outcrops with a gentle up-glacier slope and a steep down-glacier slope.
Where does river brahmaputra starts?
Angse Glacier in Northern Slope of Himalaya Range.
Is a glacier a proper noun?
Yes it is. It is the name of one specific glacier.
What is the pressure causing ice layers to slid over each other called?
Basal slip occurs when the glacier rests on a slope. Pressure causes a small amount of ice at the bottom of the glacier to melt, creating a thin layer of water. This reduces friction enough that the glacier can slide down the slope. Loose soil underneath a glacier can also cause basal slip.
Why does Rainier's Glacier move down the mountain?
Any glacier moves down a mountain or other slope because of the influence of gravity overcoming the influence of friction.
What is a large mass of water covered in ice and snow that moves slowly down a slope?
a glacier
What is the difference a glacier and an iceberg?
A glacier is on land, moving down-slope like a frozen river. When it meets the sea, it breaks off in pieces, "calving" icebergs, which float in the ocean.
What is a crevasse at the head of a mountain glacier called?
A crevasse at the head of a mountain glacier is called a "bergschrund." This feature typically forms where the glacier begins to separate from the surrounding terrain, often due to differential movement between the glacier and the mountain slope. Bergschrunds can be quite deep and wide, posing challenges for climbers and hikers navigating the glacier.
A glacier will begin to flow when it reaches what critical thickness?
Slope and temperature play a very important role here, the steeper the slope and the higher the temperature, the easier the glacies flows. That being said, a glacier typically starts to flow when it reaches a thickness of between say 50 and 200 meters, depending on slope and temperature. The speed at which it flows is then several meters per year to several tens of meters per year, again depending on slope and temperature.
What is the smooth canoe-shaped hills left by a passing glacier?
The smooth, canoe-shaped hills left by a passing glacier are known as "drumlins." These landforms are formed by the deposition of sediment beneath a glacier, which molds the material into streamlined shapes. Drumlins typically have a steeper side facing the direction of the glacier's movement and a gentler slope on the opposite side. They are often found in clusters and serve as indicators of past glacial activity.
What is the direction of a glaciers movement indicated by?
The direction of a glacier's movement is indicated by the orientation of its flow lines, which generally follow the slope of the underlying terrain. Additionally, features such as striations, which are scratches or grooves on the bedrock caused by the glacier's movement, can show the direction of flow. The position of moraines, which are accumulations of debris deposited by glaciers, also provides clues about the glacier's movement direction.
What is a large crack that forms when a glacier picks up speed called?
A large crack that forms when a glacier picks up speed is called a crevasse. Crevasses occur due to differential movement within the glacier, often resulting from variations in ice thickness or changes in slope. These cracks can be quite deep and pose hazards to climbers and explorers in glacial regions.
