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In which of the following rocks, clay predominates?

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in Construction & Building Materials by (190k points)
In which of the following rocks, clay predominates?

(a) Argillaceous rocks

(b) Calcareous rocks

(c) Silicious rocks

(d) Volcanic rocks

The question was posed to me in an interview for job.

The origin of the question is Stones topic in portion Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

1 Answer

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The correct choice is (a) Argillaceous rocks

Easy explanation: Clay predominates in argillaceous rocks. Slate is an example of this type of rock. In calcareous rocks, calcium carbonate predominates while in siliceous rocks, silica predominates.

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