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Building Materials

Q1: Pick up the hypabyssal rock from the following:

A Granite

B Dolerite

C Basalt

D All the above.

ANS:B - Dolerite

Dolerite, also called diabase, is a dark igneous rock intermediate in grain size between basalt and gabbro. Consisting of plagioclase feldspar and pyroxene, it is a widespread intrusive rock, quarried for crushed and monumental stone (known as "black granite").



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