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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 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.

What are glaciers like?

Glaciers are large bodies of ice that flow slowly over land, sculpting the landscape as they move. They can be found in polar regions, high mountain ranges, and even some lower latitudes. Glaciers accumulate snow over time, which compacts into ice and causes the glacier to advance downhill.

When did glaciers cover Ohio?

During the last glacial period, known as the Wisconsin Ice Age, glaciers covered Ohio approximately 20,000-14,000 years ago. These massive ice sheets sculpted the landscape of Ohio, leaving behind features such as moraines and kettle lakes.

What are the different types of glaciers?

Ice Sheets

Ice Shelves

Ice Caps

Ice Streams/Outlet Glaciers

Icefields

Mountain Glaciers Valley Glaciers

Piedmont Glaciers

Cirque Glaciers

Hanging Glaciers

Tidewater Glaciers

Why do glaciers melt?

Glaciers melt due to a variety of factors, including rising temperatures caused by climate change, exposure to sunlight, and seasonal variations. When these factors lead to more melting than the glacier can accumulate through snowfall, it results in an overall loss of mass and contributes to sea level rise.

Is glaciers light?

Glaciers appear white or blue in color because they are made up of compacted snow and ice, which reflects and scatters sunlight. This gives them a lighter appearance compared to surrounding rocks or land. Underneath the surface, glaciers can have layers of sediment or debris that may darken their color in some areas.

How are continental glaciers and alpine glaciers similar?

  • Both are made of compacted snow which recrystallizes into solid ice.
  • They both make Striates or Grooves, shaping the landscape they move over.
  • Both originate in high regions where the snowfall exceeds the amount of melt. This is called the zone of accumulation.
  • Both are pulled down slopes with Gravity, as the immense weight of accumulated snow and ice can no longer support its own weight, and begins to flow outward.
  • Both are an agent of Erosion as the flow of ice pushes, plucks and carries material from one place to another place.
  • Both weather rock surfaces by reducing the size of the rock formations they flow over; this is due to abrasion, plucking and grinding of rock.
  • Both carry Sediments and deposit them somewhere else.
  • Both create Morraines, or accumulations of soil and rock where the glacier reaches its furthest point of advance in any direction.

Why are glaciers important to your ecological system?

Glaciers play a crucial role in regulating global climate by reflecting sunlight and maintaining cooler temperatures. They also provide a source of freshwater for ecosystems and human communities through glacier melt. Additionally, glaciers support unique habitats and species adapted to cold environments.

How are glaciers created?

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.

Did glaciers form the Lower Peninsula?

Yes, glaciers did shape the Lower Peninsula of Michigan. During the last Ice Age, massive ice sheets covered the region, carving out the landscape and creating features such as the Great Lakes and the rolling terrain of the peninsula that exist today.

Where are glaciers most likely formed?

Glaciers are most likely formed in polar regions such as Antarctica and Greenland, as well as in high mountain ranges like the Alps or the Rockies. These areas have cold temperatures and receive sufficient snowfall for snow to accumulate and eventually compact into ice.

How do glaciers affect people today?

All throughout history and even unto this very day, glaciers make people VERY cold!

Glaciers, when they are not melting due to global warming, hold a vast amount of water. Without glaciers, most, if not all, of our oceanside villages and cities would be submerged by many feet.

It has been argued that the presence of the glaciers at the poles tends to keep the globe from drifting off its axis. In other words, north remains north and south remains south, within a few degrees.

There are many other ways in which glaciers are either beneficial or problematic to human and other species on the planet. I encourage you to do some further research on your own.

How are glaciers made?

Glaciers are formed when snow accumulates and compresses over time, turning into dense ice. This process occurs in areas where more snow falls in the winter than melts in the summer, causing the snow to build up and transform into glacier ice. The weight of the ice causes it to flow downhill, slowly forming a glacier.

What do you do when sliding on ice?

Turn the front wheels in the direction the car is teraveling, Let the catch traction and carefully try to get the car stopped. If your on "ICE" and you don't have any type of added grip on the tires like studs or chains then it is unlikely you will regain control after losing traction with all four tires.

What famous valley in a national park was formed by a glacier?

Essentially every feature in Glacier National Park was formed by a period of glaciation during the Pleistocene Ice Age, including all the mountains and all the valleys. A look at a map of the park will show several large, long lakes whose beds were scoured out by these glaciers. Some famous and oft-photographed valleys in the park that are easily accessible by car (and on the internet via webcam at www.nps.gov/glac ) are the Lake McDonald Valley, the St. Mary Valley, and the Many Glacier Valley.

Are there any Adders in England?

Yes, adders, which are a type of venomous snake, can be found in England. They are most commonly found in heathlands, moorlands, and woodlands throughout the country. Adders are protected under the Wildlife and Countryside Act 1981 in England.

What is rocky debris?

Rocky debris refers to small pieces of rocks, stones, or gravel that have eroded or broken off larger formations over time. They can be found in various natural environments such as river beds, mountainsides, or coastlines. Rocky debris can result from weathering processes, geological events, or human activities.

How is a glacier formed?

Glaciers can form only on relatively flat areas, or on slopes with less than 30 degrees of pitch in the mountains; too much steeper and the snow will avalanche instead of building up to a thicknessthat would form into ice.

Where are valley glaciers located?

Valley glaciers are streams of flowing ice that are confined by steep walled valleys, often following the course of an ancient river valley. They usually form from Cirques, where the glacier overspills the hollow and begins to travel down the valley. Alternatively, they may form branching off from an ice sheet. The downward erosive action of the ice carves a U shaped valley, as opposed to a V shaped valley for rivers. They have a lot of erosive potential as they are thick bodies of ice exerting extreme amounts of pressure. Valley glaciers 'choose' the most accessible route and erode and enlarge the area. It uses erosional processes, plucking and abrasion. Due to the size and nature of the glacier it can pick up large amounts of debris and scree and deposits it as moraine.