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The geology of the Hsiwan coal field has been studied by Dr. Yoh of theGeological Survey of Kwangtung and Kwangsi and Messrs. Meng and Chang ofthe Geological Institute of the Academia Sinica. All these authors assigned aLower Carboniferous age to the coal-bearing series. Their grounds are probably
The geology of the Hsiwan coal field has been studied by Dr. Yoh of the Geological Survey of Kwangtung and Kwangsi and Messrs. Meng and Chang of the Geological Institute of the Academia Sinica. All these authors assigned aLower Carboniferous age to the coal-bearing series. Their grounds are probably