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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
Do glaciers scratch bedrock through the process of abrasion?
When glaciers pick up loose rocks, the rocks will act as an abrasion, scoring and abrading the land beneath as the glacier slowly moved on. You can see the scratch marks on bedrock exposed on the surface in some places.
Also, boulders left isolated and strange to the area as the glacier melted and retreated are known as Glacial erratics.
What makes glaciers act like giant sandpaper?
The rocks and pebbles embedded in the ice. When these rocks and pebbles are on the bottom surface of the glacier they are dragged over the surface of the ground, cutting into it (whether it is soil or hard bedrock) cutting grooves in and polishing that surface. Much like the grit glued to sandpaper does to a surface it is rubbed against.
How much of a glacier is above the water line?
Over 90% of an iceberg's volume (and mass) is underwater. Therefore 10% is above the water.
A glacier is a flow of ice downhill, driven by snow and ice accumulating in the mountains. When a part of the glacier breaks off and begins to float on the sea, it becomes an iceberg.
Which spanish speaking country can i find glaciers?
There are significant glaciers in Colombia, Ecuador, Peru, Bolivia, Chile and Argentina. All of these countries are on the slopes of the Andes.
Is it true that climate on the highest mountains near the equator are to warm to form glaciers?
I dont know
Is a glacier a type of water form?
A glacier is formed from frozen water, and snow accumulating high in the mountains adding weight and forcing forward movement downhill.
Abrasion and plucking involves what part of glacier?
The base of the glacier, where it is in contact with the rocks beneath it.
There are many large and often beautiful glaciers in the Andes. Because many of these are in a tropical region they act as kind of warning for climatalogical conditions. Over the past 20-30 years the Andes glaciers have lost 30-50 % of their mass. This will have a very serious effect on farming all around this long range of mountains.
How fast did the black rapids of glacier of 1937 move?
Two hundred and twenty feet a day, a world record!
Why do glaciers grow slowly in Antarctica?
With so little precipitation, it is difficult for glaciers to grow more quickly. What this also means is that the existing glaciers are millions of years old.
Why do glaciers float and not sink to the bottom of the ocean?
Glaciers are made of ice, which is less dense than water. Therefore, fragments of glaciers that break off into water, called icebergs, will float.
Landforms that form at both high and low elevations are caused by?
Glaciers form in areas of permanent snow, both at high ..... reductions in middle- and lower-elevation glacial ice.
What effects did glaciers have on Canada?
The effects of the mountain glaciers on Canada included beautiful formation of distinctive features such as cirques, icebergs, and deep gorges.
What are some bottomless glacier lakes in the world?
No lakes are truly bottomless but there are some that are given that term. Lake Pend Oreille is the fifth largest glacier lake in the US, and is located in the Idaho Panhandle. Great Slave Lake in Canada is also given this name.
Are mountain glaciers generally larger than ice sheets?
No. Ice sheets are the largest kind of glacier, many times larger than mountain glaciers.
Does glacier national park have wolverines?
The National Parks Service does list wolverines as present in Glacier NP, but these reclusive animals are VERY difficult to spot.
How is the stratosphere involved with the glaciers melting causing the sea levels to rise?
It's really the entire atmosphere, not just the stratosphere, which is involved in the greenhouse effect. Carbon dioxide in the atmosphere, at any altitude, has the effect of retaining heat that would otherwise be radiated to outer space at night. The planet gets warmer as a result, and that causes glaciers to melt and the sea level to rise. I should point out that while lots of glaciers have melted, so far the sea level has only risen by a small amount. The largest glaciers, in Antarctica, remain frozen. If they melt, things are going to get very interesting.
How will melting glaciers affect the mountain streams and rivers downstream?
If mountain glaciers disappear there will be no source for many mountain streams, which will then dry up. Many rivers will be reduced in size as a result.
What are the pros and cons of glaciers?
Pros:
· Glaciers provide drinking water
· Glacier water provides plants water
· Glaciers help generate hydroelectric power
Cons:
· Glaciers cause flooding
· Glaciers cause avalanches
The answer is a term called, Glacial Calving
What are the similarities and differences in how wind and glaciers abrade rock?
Wind abrades rock by sandblasting, this is the process in which wind causes the blowing of millions of grains of sand, which bumps across the surface of rocks' surface. it can also happen due to deflation, which is when wind removes the top layer of fine sediment/soil to cause desert pavement (a cheaper way to form pavement☺).
Glaciers, however, abrade rock by simply using Gravity. when enough ice builds up on a slope, the ice begins to move downhill. The steeper the slope, the faster the glacier. As glaciers move fowad, the material that they picked up scratch and abrade the rock and soil underneath the glacier, which causes erosion.
