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The texture which involves polygonal or trigonal spaces in rocks is ______________

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The texture which involves polygonal or trigonal spaces in rocks is ______________

(a) Directive texture

(b) Intergrowth texture

(c) Interstitial texture

(d) Intergranular texture

I had been asked this question in final exam.

Asked question is from Composition and Texture of Igneous Rocks in division The Study of Rocks of Engineering Geology

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Correct choice is (d) Intergranular texture

The best explanation: In certain igneous rocks crystals formed at earlier stages may get so arranged that polygonal or trigonal spaces are left in between them. These spaces get filled subsequently during the process of rock formation by crystalline or glassy masses of other minerals.

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