Glaciated Landscapes: Formation Of Glaciers Flashcards
1
Q
How do glaciers form?
A
When temperatures are cold enough that fallen snow remains and next years snow lays on top of the previous snow
2
Q
What is the density and structure of fresh snow?
A
0.05g/cm^3 and made of flakes of snow
3
Q
How does glacial ice form?
A
Snow lands on previously fallen snow year by year, which expels the air and forms high density ice
4
Q
What is firn and what is its density?
A
Snow that survives one summer, and it has a density of 0.4g/c^3
5
Q
What is the density of glacial ice?
A
Between 0.83 and 0.91g/cm^3
6
Q
What is the process by which glacial ice forms and how long does it take?
A
Diagenesis, and it can take between 30-40 and 1000 years to occur
7
Q
Where and what is true glacial ice?
A
At the depth of 100m in a glacier, where the ice appears bluish
