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Why are the uppermost 50 meters of a glacier referred to as the zone of fracture?
Wiki User
∙ 10y ago
The zone of fracture experiences tension hen the glacier moves over irregular terrain. This tension results in gaping cracks called crevasses. Crevasses can be 50 meters deep. They are often hidden by snow and make travel across glaciers dangerous.
Wiki User
∙ 10y ago
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Why do crevasses form in the upper portion of a glacier but not below a depth of about 50 meters?
Crevasses form on the upper portion of the glacier because when a glacier moves over irregular terrain, the zone of fracture is subjected to tension, which forms the crevasse. The reason why it may not form below the depth of 50 feet is because plastic flow seals them off.
Is it true that due to the force of friction a glacier will start to move downhill once the layer of snow and ice is more than about 30 to 40 meters deep?
False. A glacier will move due to the force of gravity, not friction.
Can you watch a glacier move?
You can with the fastest moving glaciers in the world. For example, Jakobshavn in western Greenland advances about 20 meters per day.
Can you see a glacier move if it goes 112 meters a day?
Maybe. 112m is just the average, but here is the break down: 4.66 meters/hour 7.8 cm/minute 1.3 mm/second What do you think?
A glacier will begin to flow when it reaches what critical thickness?
Slope and temperature play a very important role here, the steeper the slope and the higher the temperature, the easier the glacies flows. That being said, a glacier typically starts to flow when it reaches a thickness of between say 50 and 200 meters, depending on slope and temperature. The speed at which it flows is then several meters per year to several tens of meters per year, again depending on slope and temperature.
Why do crevasses form in the upper portion of a glacier but not below a depth of about 50 meters?
Crevasses form on the upper portion of the glacier because when a glacier moves over irregular terrain, the zone of fracture is subjected to tension, which forms the crevasse. The reason why it may not form below the depth of 50 feet is because plastic flow seals them off.
What is the area of Sperry Glacier?
The area of Sperry Glacier is 874,120.9872384 square meters.
How many meters deep is the Lambert Glacier?
According to its Wikipedia entry: "Lambert Glacier is a major glacier in East Antarctica. At about 60 miles wide, over 250 miles long, and about 2,500 m deep, it holds the Guinness world record for the world's largest glacier."
How big is the Bering Sea?
The Bering Glacier is the largest (5200 sq km) and longest (190km) glacier in North America. It is 800 meters thick
In 2010 a glacier was 171 meters away from a road every year since then it has moved 3 meters closer to the road at this rate in what year will the glacier meet the road?
It will take 57 years, so it will meet it in 2067.
What is the largest interior glacier?
The world's largest glacier is the Lambert glacier in Antarctica , according to the United States Geological Survey.The glacier is more than 60 miles (96 km) wide at its widest point, about 270 miles (435) long, and has been measured to be 8,200 feet (2,500 meters) deep at its center.
When does the snow and ice that make up glacier begin to move downhill?
Once snow and ice reach more than 30 to 40 meters gravity begins to pull the glacier downhill.I hope I helped you!!! =)
What is the average thickness of a glacier?
The average thickness of glaciers decrease every year due to global warming and the melting of the polar ice caps. The average thickness of the Himalayan glacier is 85 and 175 meters thick.
What is the worlds third largest glacier?
Lambert Glacier is the world largest Glacier. It is in East Antarctica.The Baltoro Glacier, at 62 kilometers long, is one of the longest glaciers outside the polar regions. It is located in Baltistan, in the Gilgit-Baltistan Pakistan. The Lambert Glacier, located in East Antartica, is the largest on Earth. 250 miles (400 km) long, 60 miles (100 km) wide, and 2,500 meters deep.
Is it true that due to the force of friction a glacier will start to move downhill once the layer of snow and ice is more than about 30 to 40 meters deep?
False. A glacier will move due to the force of gravity, not friction.
Can you watch a glacier move?
You can with the fastest moving glaciers in the world. For example, Jakobshavn in western Greenland advances about 20 meters per day.
Can you see a glacier move if it goes 112 meters a day?
Maybe. 112m is just the average, but here is the break down: 4.66 meters/hour 7.8 cm/minute 1.3 mm/second What do you think?
