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Glaciers

Glaciers are large, dynamic bodies of ice that form over long periods of time when snow accumulation exceeds ice ablation. They are among the most significant forces shaping Earth's landscape over long time scales. Glaciers are currently found at Earth's poles and in mid-latitude and equatorial mountains.

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How did glaciers from the last ice age the north American continent?

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It shaped much of New England.

Huge amounts of gravel were pushed around, creating Long Island.

It covered Canada under thousands of feet of ice.

What is a U-shaped valley formed by glaciers called?

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because a space man crashed into it:]

Do glaciers sink?

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Not a glacier, but an iceberg, which was drifting South from the Arctic regions after breaking off from the Polar ice-cap in the warmer Spring weather.

What do glaciers leave behind as the retreat?

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As glaciers retreat, they leave behind deposits of rocks.

What is the percent of glaciers on earth?

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Glaciers cover nearly 10% of Earth's land surface.

What are forces that can wear down rocks?

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The erosive forces that wear down rocks are the wind, rain, and sun. In humankind's feeble attempt to stop these forces, we apply man-made and natural sealers as a kind of shelter from them. Geologically speaking, all human attempts to control erosion will ultimately fail as nature's rock recycling machine grinds on.

Why were the glaciers covering Michigan?

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It starts to snow in Michigan in mid-November, and continues to snow until mid-February.

Are there any rock glaciers in the US?

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yes in texes

How do melting glaciers affect a region?

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Melting glaciers can be a danger to society. The melting of glaciers means that the sea level would rise. This could put some current sea-level cities underwater, causing damages and forcing people to find higher ground.

What is a winding ridge left by melting glacier?

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You may be referring to an "esker," a snake-like deposit of sediment left by a stream of running water underneath a glacier. At the edge of a glacier, a "moraine" also can form. A moraine is a pile of sediment and debris pushed by the glacier that forms alongside the glacier - a lateral moraine - or at the end of a glacier's run - a terminal moraine.

What does glaciers have to do with science?

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A little, maybe.

1. According to some ideas in geotechnics, when an ice field melts away, the isostatic rebound of the earth's crust may be enough to allow more gas-rich magma to fill the void, and cause an eruption. Because the isostatic rebound may open up old fault in the crust. This would only happen if there had been a considerable ice field.

2. If a volcano erupts beneath a glacier, it will melt the glacier, and can cause huge floods of water. As happens sometimes in Iceland. For Iceland not only has glaciers aplenty, it also is located directly above a major tectonic plate junction. Indeed, the volcanic activity produced Iceland.

What are two ways gravity helps glaciers shape landforms?

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well, for one gravity from the moon pulls on the ocean to form tides, and tides can channge the form of the land. this really takes place cause the polor caps are melting so there is more water that comes in at high tides. thats one. cant think of another so good luck!!

What color are glaciers?

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white

How much of earth's land did glaciers cover?

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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.

What caused the glaciers to melt at the end of the Ice Age?

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Glacers are formed by hundreds of years of constant snow fall on the earth. As the snow accumulates, it creates weight and pressure on the snow below causing large chunks of ice to form and grow in height and length.

How are glaciers created?

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Glaciers are made up fallen snow which over many years have compressed together to form large thickened ice masses. Glaciers form when snow stays in one area long enough to transform into ice. The amazing thing about glaciers is their ability to move. Due to the sheer mass, glaciers move like very slow rivers. Some glaciers can be as small as football field's whereas some are hundreds of kilometres in size. A valley that is carved by a glacier, or glacial valley, is normally u-shaped. The valley becomes visible when a glacier has formed on it due to the landscape shape. When the ice recedes or thaws, the valley is left with small boulders that were transported within the ice. The floor gradient does not affect the valleys shape, the size of the glacier does. Continuously flowing glaciers, especially in the ice age, also very large sized glaciers carve wide, deep incised valleys. Examples of U-shaped valleys are found in every mountain region that has experienced glaciation, usually during the Pleistocene ice ages. Most present U-shaped valleys started a V-shaped before glaciation. The glaciers have carved it out wider and deeper, resulting in the change of the shape. This carries on through the glacial erosion processes of glaciation and abrasion, which results in large rocks being carried in the glacier. This is also known as plucking. The rocks scrape against the side of the mountain and gorges and groves out big chunks of the mountain. Some examples of tarns are two in Easdale. Huge forces caused by millions of tonnes of ice have scooped out of the main Easdale tarn. Lower down the valley are several bowls which are filled with bog today. Moraine is collected by the glacier as it scrapes its way downhill and it is left behind when the glacier melts. The lumpy appearance of the land across the tarn is due to the piles of moraine left behind when the glacier melted. This kind of landscape is very common around corries. It is called hummocky moraine. Most tarns are dammed in by piles of moraine and in this case at Easdale. Where a stream leaves a tarn it cuts through the moraine at an outflow. At the back of tarns we usually see a shattered wall of rock, a headwall. These have been made by the plucking action of the ice as it forces its way down the rock face. A material called boulder clay is left on the floor of the valley. As the ice melts and retreats up the valley, it is left with very steep and a wide, flat floor. A river or stream may remain in the valley. This replaces the original stream or river and is known as a misfit stream because of its size. The river is expected to be bigger due to the sheer size of the valley.

How do alpine glaciers form?

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Alpine glaciers form when snow piles up after a while they begin to build up eventually making an alpine glacier.