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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.

1,124 Questions

What does glacier national park look like?

I've been to 58 national parks in the U.S. and Canada, and Glacier NP ranks in my personal top ten for scenic beauty.

The process in which a glacier loosens and picks up rock as it moves is called?

Plucking is the process in which a glacier freezes around cracked and broken rock and when it moves downhill, the rock is plucked from the back wall of the glacier.

Can glaciers transport and deposit rock?

The force of ice being pulled down by gravity can create sufficient movement to displace all but the largest or most well-anchored rocks. Glacial movement can slide rocks several tons in weight.

What are similarities of geyser and glacier?

None.

Except that both words start with "g" and end with "r".

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

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.

Do glaciers sink?

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?

As glaciers retreat, they leave behind deposits of rocks.

What is the percent of glaciers on earth?

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

What are forces that can wear down rocks?

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?

Glaciers covered Michigan during the Ice Age because of the continental ice sheets that extended southward from the North Pole, bringing massive amounts of ice and snow. These glaciers advanced and retreated over thousands of years, shaping the landforms we see in Michigan today.

What is a winding ridge left by melting glacier?

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 are two ways gravity helps glaciers shape landforms?

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!!

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.

What are features left behind glaciers?

  1. The glaciers flows unevenly beneath the surface, and regions of tension and compression build under the brittlesurface. As aresult, large cracks, called crevasses.
  2. Some parts of the ice sheets may move out over the ocean and form ice shelves.

How do valley glacier modify the mountainous areas where it forms?

a. deepens it

b. straightens it

c. all of these

d. only deepens it and widens it

C.) all of these

Why are glaciers melting away in the world today?

Because we are leaving behind an Ice age, and as the Earth gradually warms, the glaciers formed in the Ice age begin to melt.

Most glaciers are melting, a few are adding mass. Glaciers melt when their mass budget becomes negative because there is too much melt caused by warmer temperatures, not enough precipitation to balance that, or both. The amount of precipitation over all glaciers and ice sheets is generally not changing too much, just shifting from place to place and moving through the vagaries of natural variability. However, temperature is rising, particularly in the ablation zones of glaciers, and this is what is causing them to melt more than they would. We stopped coming out of the last ice age (i.e. temperatures stopped warming as a result of orbital forcings and their feedbacks associated with this particular ice age) several thousands of years ago; this could not possibly be the cause of increased mass loss today.

The process of glaciers melting is called retreatment. As a glacier is in the process of retreating, the volume of water begins to melt. The water level had dropped by 25 m by only the terminus as of the Helm Glacier for example! Imagine how large of a decrease the water level could have had if all the water lost in total was calculated! The water than effects the regions surrounding the glaciers, as in the Helm glacier, that contain vast quantities of fresh water. Since these glaciers are made out of fresh water resources, the more water the glaciers lose, the more water we lose out on too. This will affect our water systems, the global water system, and us humans greatly. 68.7% of the earth's fresh water resources are in icecaps and glaciers, but since they are continually melting away, the water is going to have an impact on plants and animals as well (since they depend on the water we drink). The volume of ice use to be so large in the Helm Glacier, but that ice over time began to melt, resulting in serious damage to those who wait in the future.

The factor that most contributes to a glacier advancing or retreating all depends on the temperature, climate, and weather in the atmosphere. When the temperature of the atmosphere rises, the climate and weather is affected due to an indirect measure of climate change. Global temperatures have increased by 0.3-0.6*C since the last century, and in response to increasing temperatures, glaciers have generally been thinned out, loss of mass, and have been retreated over the last 100 years. The temperature of earth had been conducted by surveyors that humans have been the result to this Jurassic climate change. Also known as global warming, humans are adding large quantities of fine particles (aerosols) into our atmosphere, mainly from industrial and agriculture activities. Even though most of these particles have been circulating and renewing itself, aerosols still affect the radiation balance. This effect is adding to the nature of particles as well, and in our case, glaciers. Global warming affects the temperatures, and current climates that transfer in the atmosphere (from the atmosphere the heat is naturally moved to earth). If humans could someway stop the act of global warming (though many are choosing not to), this would result to advancement in global glaciers. Until then, glaciers will remain in the process of retreating.

Overall, retreating is the overall result of our global glaciers today. Glaciers are affecting our water systems which is our one and only water source. Water is important and is a necessity in our lives, and it is in our hands to fix this. Advancing has not been in power for a long time, but hopefully with everyone in our hands, we can fix this problem as a whole. As we have been taught, it is not only us mammals who must depend on the earth's limited supply of fresh water, but the different plants and animal species that live within it. Think back to the main contributer to retreatment on the helm glacier, what could you do to fix this problem? Therefore, that is why glaciers are in the process of melting.

How does a glacier recede?

An advancing glacier is like an ice making machine with the output being dropped on a conveyor belt. The ice travels along until the temperature of the surrounding environment stops it from proceeding any further by causing it to melt. When a glacier recedes, the conveyor belt is not switched to "reverse", it just means that the point at which it melts is moving closer to the ice making machine.

What is it called when I have breaks off the glacier and becomes an iceberg?

New icebergs float on sea water and are broken away from the ice floe in a process called calving. The iceberg calvesoff the floe.