Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?
Correct answer: A. Vitrain
- A. Vitrain
- B. Clarain
- C. Durain
- D. Fussain
Explanation
Vitrain forms the bright, glassy and lustrous black bands in bituminous coal. Clarain is comparatively bright but less lustrous, while durain and fusain are duller constituents.
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