Burning coal seams.
Ref.:
- Kuenzer, C., Jianzhong Zhang, Tetzlaff, A., van Dijk, P., Voigt, S., Mehl, H., and Wagner, W. (2007): Uncontrolled coal fires and their environmental impacts: Investigating two arid mining regions in north-central China. Applied Geography 27, 42-62.
Mineral List:4 entries listed. 3 valid minerals.
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