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Shivam Sharma posted an Question
September 05, 2020 • 22:45 pm 30 points
  • CSIR NET
  • Earth Sciences

Glaciers are downward moving bodies of (a) only snow (b) mostly ice and some snow at the top (c) mostly snow and some ice at the top (d) snow and ice in alterna

Glaciers are downward moving bodies of (A) only snow (B) mostly ice and some snow at the top (C) mostly snow and some ice at the top (D) snow and ice in alternate layers The basal section of amphibole is six-sided while the same of pyroxene is eight-sided. This is because of the absence of the crystal face (A) {100} (B) {011) (C){1i) (D) {0l0)

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    Sajan sarthak best-answer

    1 ..Mostly ice and some snow at the top. snow when fresh waterdrops below it's freezing point . ice is lithified compact snow 2. because due to absence of 100 plane

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    Rahul kumar Best Answer

    1.(B) Mostly ice and some snow at top Initially snow gets deposited on the top of glacier and continuous deposition of snow will lead to compaction of previously deposited snow. Snow upon compaction will give rise to ice which will be present at the bottom part of the glacier in large amount. Refer to the attached figure. 2(A) Absence of (100) plane. Basal section of Amphibole doesn't have (100) plane while in Pyroxene (100) is present. Refer to the attached figure.

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  • Veer vikram singh

    Answer: Option B mostly ice and some snow at the top

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    How Snow at top

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    Actually during deposition, water is present in form of snow, which is very light. but when large amount of snow gets deposited, the snow gets compacted and become ice. So in glacier most of the part is under compression except thin upper layer. hence glacier has thin layer of snow laying over the compacted snow known as ice.

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