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Pick the option which does not determine the texture of igneous rocks.

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Pick the option which does not determine the texture of igneous rocks.

(a) Colour

(b) Size

(c) Shape

(d) Arrangement of the constituents within the body of the rock

This question was addressed to me in exam.

My question comes from Composition and Texture of Igneous Rocks topic in section The Study of Rocks of Engineering Geology

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The correct answer is (a) Colour

For explanation I would say: The term texture is defined as the mutual relationship of different mineralogical constituents in a rock. It is determined by the size, shape and arrangement of these constituents within the body of the rock.

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