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Why do crevasses form in the upper portion of a glacier but not below a depth of about 50 meters?
Wiki User
∙ 13y ago
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.
Wiki User
∙ 13y ago
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What is the difference between glacier erosion and glacier deposition?
Glacier erosion is when the ground below the glacier is removed. Glacial deposition is when the debris (eroded ground) is left behind when a glacier melts and the face retreats.
What is the difference between glacier erosion and glacial deposition?
Glacier erosion is when the ground below the glacier is removed. Glacial deposition is when the debris (eroded ground) is left behind when a glacier melts and the face retreats.
How cold does it have to be for a glacier to form?
Below the freezing temperature of water.
What is the plastic portion of the upper mantle?
It is called the asthenosphere, the layer directly below the lithosphere.
What does calving mean in relation to glaciers?
Usually a variety of things - a combination of melting from below due to being submerged in water, melting from above, and a weak point for the whole thing to crack off. Gravity takes it from there.
Why can crevasses in glaciers only be 50M deep?
Plastic flow occurs below that depth.
What is the difference between glacier erosion and glacier deposition?
Glacier erosion is when the ground below the glacier is removed. Glacial deposition is when the debris (eroded ground) is left behind when a glacier melts and the face retreats.
Hanging valley and a glacial trough?
A hanging valley is a smaller valley that sits above a main glacial trough, formed by tributary glaciers that did not erode as deeply as the main glacier. A glacial trough is a U-shaped valley carved out by a glacier as it moves downhill, creating steep walls and a flat bottom.
What is the difference between glacier erosion and glacial deposition?
Glacier erosion is when the ground below the glacier is removed. Glacial deposition is when the debris (eroded ground) is left behind when a glacier melts and the face retreats.
How the Boulder Glacier has changed in recent years?
Boulder Glacier is shrinking at an increasing rate, such that it will not be classified as a glacier soon (if not already). See the link below for repeat photos.
What are two kinds of glacier's?
A temperate glacier remains at melting point from surface to base throughout the year. A polar glacier always remains below freezing point.
How cold does it have to be for a glacier to form?
Below the freezing temperature of water.
What is the deepest point on land?
Dead Sea shore, Israel-Jordan: 1369 feet / 417.5 meters below sea level
Describe how the above ground portion and the below ground portion of the ecosystem are two interrelated and interdependent communities?
Describe how the above ground portion and the below ground portion of the ecosystem acts as two interrelated, interdependent communities
WHATS 40 meters below sea level?
whats 40 meters below sea level
Does a hill farm have good soil?
Usually no, but if it's below a glacier, the soil can be very rich.
What layer in the atmosphere is the top portion of the troposphere?
The troposphere is the portion of the atmosphere closest to earth. It is below the stratosphere.
