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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
October 16, 2020 • 18:36 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir, what we understand from last 4-5 lines.
The mechanics of a glacier flow is not clearly understood, but the velocity of glacier movement can be measured on the glacier surface, by driving a series of stakes and by surveying their displacements Over a certain period of time. On such surveys, the glaciers have been found differing in their movement rates, from a few cm per day to as much as 20 metres per day under extreme conditions. The velocities, deep below the glacier surface, are dificult to be evaluated even with the help of bore holes.lt is however, generally believed that the rate of glacier flow increases with depth, but some minimum movement does OCCur at the base of
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Sajan sarthak Best Answer
Here the paragraph is saying about the glacial movement and it's velocity. as we know the glacier tip always moves it's visible from that we can know the galcier velocity by observing the lines,grooves,or stratition marks per unit time. And again the statement suggest of the highest velocity below and lowest on top but the deeper part velocity can't be measured directly.. few evidence like the groove and displacement mark is seen on the top of soil.after glacier is mealted seasonally
sir, what he means to bore hole in glacier as we only use this term in groundwater or and bore into earth in geophysics
borehole is created also in glacier to take cores also.
ok sir. thankyou.
see the image