Which one of the following is not an igneous rock ?

Which one of the following is not an igneous rock ?

Granite

Slate

Basalt

Gabbro

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2023

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The correct option is B.

Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava). Metamorphic rocks are formed from existing rocks (igneous, sedimentary, or other metamorphic rocks) that have been changed by heat, pressure, or chemical reactions. Slate is a metamorphic rock.

Granite is a coarse-grained intrusive igneous rock. Basalt is a fine-grained extrusive igneous rock. Gabbro is a coarse-grained intrusive igneous rock, compositionally similar to basalt. Slate is a fine-grained, foliated metamorphic rock formed by the low-grade regional metamorphism of shale or mudstone.

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