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20 June, 14:19

The Vaiont Dam area was vulnerable to mass movement because (Choose one):

A. limestone beds there dipped parallel to the mountain slope and were interlayered with weak shale.

B. underlying granite bedrock had begun to weather.

C. logging in the region had stripped the mountain tops of vegetation.

D. shale layers in that region dipped into the mountain slope, causing weakness.

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  1. 20 June, 14:34
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    A. limestone beds there dipped parallel to the mountain slope and were interlayered with weak shale.

    Explanation:

    The Vaiont Dam is prone to mass movement due to the site of the dam is built on a platform that is not stable and can break or slide. In due course of time due to heavy pressure or where the rocks are not weak such as in the limestone areas and due to the process of Solifluction a type of soil creep that takes place in the high elevation areas.
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