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Author Question: Crevasses (deep fractures or cracks) form in glaciers because ________. (Read 39 times)

big1devin

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on: Feb 28, 2020

Question 1

Which one of the following applies to a valley glacier that lengthens (extends the position of its terminus downslope over a period of many years?
◦ accumulation exceeds wastage
◦ accumulation and wastage are about equal
◦ wastage exceeds accumulation
◦ none of the above

Question 2

Crevasses (deep fractures or cracks) form in glaciers because ________.
◦ there is not always the same amount of ice available in all areas so cracks form when the ice tries to move and fill in empty parts of the glacier
◦ not all of the ice in a glacier moves downhill at the same rate in the glacier
◦ as the glacier moves over irregular topography, cracks can form anywhere in the glacier but they are called "crevasses" only if they are near the surface
◦ as the glacier moves over irregular topography the bottom of the glacier (known as the zone of fracture) cracks and the cracks propagate upward to the surface of the glacier
◦ as the glacier moves over irregular topography, the brittle upper layer or zone of fracture is subject to tension and cracks above the ductile layer
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by big1devin on Feb 28, 2020

jomama

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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big1devin

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Reply 2 on: Feb 28, 2020
YES! Correct, THANKS for helping me on my review

LVPMS

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Reply 3 on: Yesterday
:D TYSM

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