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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

Are glaciers destructive?

Ok, this answer is pretty obvious; NO, OK JK, the answer is YES! Because... glaciers cause a lot of damage by making it cold, maybe a little death, and it could kill many plants. Thanks, the mysteries.:)

What causes alpine glaciers to flow?

Glaciers move by extrusion flow. This involves two main processes; internal deformation and basal sliding.

Internal Deformation

Under the immense weight of overlying ice, individual ice crystals align into layers and slide over each other. (Much like the property of metal ions which leads to the characteristic of maleability).

Basal sliding

Meltwater (from pressure melting) lubricates the base of the glacier, which slides over the bedrock under the influence of gravity.

The end or outer margin of a glacier?

The end or outer margin of a glacier is called the glacier terminus. This is where the glacier ends and begins to melt or calve into the surrounding environment, such as a body of water or land. Changes in the glacier terminus are closely monitored by scientists to understand the health and movement of the glacier.

What is happening to the glaciers?

The sea ice will melt, and less ice will be reflecting the sunlight. The water absorbs the heat from the sunlight, and the heated water will melt more of the ice. That way animals woudl not be able to adapt to their habitat.

How much fresh water is in glaciers?

Water resources are sources of water that are useful or potentially useful to humans. Uses of water include agricultural, industrial, household, recreational and environmental activities. Virtually all of these human uses require fresh water.

97% of water on the Earth is salt water, leaving only 3% as fresh water of which slightly over two thirds is frozen in glaciers and polar ice caps. The remaining unfrozen freshwater is mainly found as groundwater, with only a small fraction present above ground or in the air.

Fresh water is a renewable resource, yet the world's supply of clean, fresh water is steadily decreasing. Water demand already exceeds supply in many parts of the world and as the world population continues to rise, so too does the water demand. Awareness of the global importance of preserving water for ecosystem services has only recently emerged as, during the 20th century, more than half the world's wetlands have been lost along with their valuable environmental services. Biodiversity-rich freshwater ecosystems are currently declining faster than marine or land ecosystems. The framework for allocating water resources to water users (where such a framework exists) is known as water rights.

Where are cirque glaciers?

A cirque glacier is a small glacier that occupies a cirque or rests against the headwall of a cirque. A cirque is a deep, horseshoe-shaped hollow with steep walls which was created by erosive activity of glaciers.

Does Yosemite have glaciers?

According to Wikipedia, Yosemite National Park has several glaciers, but they are small in formation. Most of the glaciers are found in areas where there is a great deal of shade, like the north and northeast facing regions.

The largest glacier in Yosemite is the Lyell Glacier and it expands over 165 acres. In 1871, most of the glaciers within the park were discovered by John Muir, like the Merced Glacier.

For more historical and travel information about Yosemite National Park, check out this great article: http://www.scenicwonders.com/yosemite_national_park.html

What are Glaciers and how much water can they hold?

Glaciers are large masses of snow, recrystallized ice and rock debris that accumulate in great quantities and begin to flow outwards and downwards under the pressure of their own weight. Glaciers form when yearly snowfall in a region far exceeds the amount of snow and ice that melts in a given summer. In this way, massive quantities of material accumulate in relatively small periods of geologic time. The molecules of ice being close together and because of the pressure means it would need a lot of water to make a little ice.

Are the glaciers in antarctica the biggest in the world?

The world's tallest mountain -- Mt Everest at 29,029' (8,848 m) is located in Asia.

The world's largest volcano -- Mauno Loa -- about the size of New Mexico, is located on Hawaii's big island of Hawai'i.

What is a land feature found at Fox and Franz Josef?

At Fox and Franz Josef glaciers in New Zealand, the land feature you would find are massive rivers of ice flowing down the valleys of the Southern Alps. These glaciers are some of the most accessible in the world, attracting visitors who come to witness their spectacular beauty and unique environment.

What color are glaciers?

Glaciers can appear to be white, blue, or even black. They can look white when covered in snow, blue due to ice compression, or black from debris and sediment.

An example for a glacier?

well you tell me if your a crack head then its nothing hahaha or maybe its your brain saying hello to taylor swift lol. that doesn't make sense, i knw. anyways back to answering the questions. sike! im not answering the question lol. anyways if you think im funny let me know. you can call me at 1-888-588-2300

Why is the study of glaciers important?

Air bubbles in ice trap whatever was in the air at the time the ice froze. By looking at ice core samples, we can tell what the atmosphere was like thousands of years ago. There are also layers of volcanic ash that record eruption times. It is another form of reading years and what events, such as weather, occured in those years.

Is it true or false that humans had to wait for glaciers to spread before they could begin growing crops?

False. Human civilizations did not have to wait for glaciers to spread before growing crops. They developed agriculture independently in various regions around the world as a way to secure reliable food sources. The spread of glaciers would have made agriculture more challenging due to the colder temperatures and ice cover.

What landforms are created by glaciers and how?

Glaciers create various landforms such as U-shaped valleys, moraines, drumlins, and fjords through processes like erosion, deposition, and melting. For example, as glaciers move, they erode the land beneath them, forming U-shaped valleys. When glaciers retreat, they leave behind piles of debris called moraines. Drumlins are elongated hills formed by glaciers depositing sediments, and fjords are deep, narrow inlets created by glaciers moving through valleys and subsequently melting.

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

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.

Where are continental glaciers found today?

There are continental glaciers in and around the Arctic and Antarctic circles, and covering parts of Greenland and other polar region islands.

What are glaciers made up of?

Glaciers are not made of rock; they are made of ice. Glaciers can contain rocks, but not of any particular type. Rather, they carry whatever type of rock they are going over or have gone over.

What are giant glaciers called?

Giant glaciers are called ice sheets. These massive expanses of ice cover large areas of land and are found in Antarctica and Greenland. Ice sheets can be several kilometers thick and have a significant impact on global climate.

How are glaciers dangerous?

They can be very dangerous to ships passing by, especially if it is foggy. A lot of times glaciers will split causing splinters of icebergs. These can be extremely dangerous because they can be mostly underwater.

Other than that, the edge of a glacier on land can easily kill with falling pieces of ice; this is a growing fear in areas where they are tourist destinations, since the ice melts easier and is even less predictable than before.

Slips on the ice can injure just as much as the ice falling on you can; there are always crevasses and slips that you can fall down; and of course you are standing on a frozen river.

Also, ships are in grave dangers when passing through icy waters. Since, as said before, glaciers can be mostly underwater, ship's can hit them and burst through the metal. An example is the Titanic.

How do glaciers retreat?

Glaciers retreat due to a combination of increased melting at their lower ends and reduced snowfall at their upper ends. This melting is often caused by rising temperatures due to climate change. As glaciers lose more ice than they gain, they shrink and retreat.

Moraines carried in the bottom of glaciers?

Moraines carried at the bottom of glaciers are called basal or ground moraines. They consist of rocks, soil, and other debris that have been plucked and eroded by the moving glacier. Basal moraines are typically deposited at the glacier's terminus or along its path as the glacier retreats.

Where can you find glaciers?

Glaciers can be found in polar regions like Antarctica and Greenland, as well as in high-altitude mountainous areas around the world. Some examples include the glaciers in the Alps, Himalayas, Andes, and Rocky Mountains.