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by moving along the ground
answ2
1. At their head catchment area, the glacier will collect the annual snow fall, and commence to move it downwards. This process opens up cracks (bergschrunds) between the snow and the rock, for the rock will be warmer than the snow. (heat from the interior) Into these crevices, sometimes many feet wide, rocks will fall from the mountain above, and water will flow off the day-warmed rocks.
2. In the main long body of the glacier there will be occasional steps in the valley bedrock, and there will be steps where a minor glacier branch joins a larger glacier. At these step points, a crevassed ice-fall will form, and again any moraine debris from the surface will become entrained in the ice.
These entrained rocks and debris will be ground along the bedrock by the motion of the glacier, and produce a very fine rock flour in the process.
Thus at the base of the glacier, we have water from melt, boulders and debris, and rock flour. These will be all ground along by the glacier above. Small and medium boulders will be ground to a rounded form, larger boulders will have their sharper corners ground off, but at any time, much of their body will be embedded in the glacial ice, and they will rotate only slowly. As these are dragged across the bedrock, they will produce the striae - the glacial scratches and gouges in the bedrock.
3. Upvalley from the snout of the glacier, is the ablation (wastage) zone, where some of the ice mass will sublimate directly to water vapour, and much will melt. Near the snout, the glacier may be completely covered by rock moraine, and kettle holes will form due to uneven melting. Immediately downvalley of the glacier, a melt lake may form, and this feature is very destructive of the remaining ice. When masses of ice fall into the melt lake, minor tsunami (but ten metres or so high) may be created and these are dangerous to humans.
A glacier can move rock from the mountains to the plains hundreds of times faster than simple riverine processes will do.
Unlike a river, glacial ice can extend far below the surface level, and (where I live) glacial lakes 300m above sea level have their depth up to 100m below sea level.
A fiord glacier may have its bed several hundreds of metres below sea level, the ice breaking off where the fiord enters the sea, and the ice becomes buoyant; and depositing a mound of moraine at the mouth of the fiord.
What else can I help you with?
How did the glaciers affect the land in the colonies?
Glaciers in the colonies shaped the land by carving out valleys, creating lakes, and depositing rocks and debris as they moved. This process significantly influenced the landscape, soil composition, and natural resources of the region.
What are some differences in how two types of glaciers affect the land?
There are two primary types of glaciers: alpine glaciers and continental glaciers. Alpine glaciers, found in mountainous regions, carve sharp, U-shaped valleys and create features like cirques and arêtes as they move down slopes. In contrast, continental glaciers, which cover vast land areas like Greenland and Antarctica, reshape the landscape on a much larger scale, flattening terrain and depositing thick layers of sediment, resulting in features like drumlins and moraines. While both types of glaciers erode and transport material, their impacts on the land differ significantly due to their sizes and environments.
How did glaciers affect water levels in the ocean?
Periods of glaciation cause sea levels to drop, because that water gets locked up in ice on land.
How much of earth's land did glaciers cover?
Currently, glacierscover about 10% of Earth's land. Glaciers covered about 32% of Earth's land during the maximum point of the last ice age.
How did the glaciers affect the type of soil in the Midwest?
the soil became very wet and slushy when the glaciers melted
How did glaciers affect Canada's land?
in new foundland
How did the glaciers affect the land colonies?
glaciers pushed soil from New England to the middle colonies
How did the glaciers affect the land in the colonies?
Glaciers in the colonies shaped the land by carving out valleys, creating lakes, and depositing rocks and debris as they moved. This process significantly influenced the landscape, soil composition, and natural resources of the region.
Is a glaciers a land form?
NO
How have glaciers changed the land in California?
glaciers weather the earths surface
How did glaciers help form land?
As the glaciers move over the land they help smash the land and also add silt and dirt to the ground.
What is interglaciation?
It is the time when glaciers disapeared from the land before reforming.
How are continental and valley glaciers?
Continental glaciers are thicker and larger. Valley glaciers are formed on mountains; continental glaciers are formed on flat land.
What are some differences in how two types of glaciers affect the land?
There are two primary types of glaciers: alpine glaciers and continental glaciers. Alpine glaciers, found in mountainous regions, carve sharp, U-shaped valleys and create features like cirques and arêtes as they move down slopes. In contrast, continental glaciers, which cover vast land areas like Greenland and Antarctica, reshape the landscape on a much larger scale, flattening terrain and depositing thick layers of sediment, resulting in features like drumlins and moraines. While both types of glaciers erode and transport material, their impacts on the land differ significantly due to their sizes and environments.
How did glaciers change the land of the land of the northeast region?
L
How do glaciers affect earths surface?
When they slide or move across the land they pick up rocks and soil which changes the Ground beneath it.By glacial erosion which is when slowly over time large U shaped valleys are carved out; or by 'plucking' which is when rocks or boulders are literally plucked up from the surface and carried down the valley.Rocks frozen underneath glaciers carve the land when glaciers move
How much of Alaska's surface is covered by glaciers?
There is about 4.9% of land covered by glaciers in alaska.
