According to the conodont and fusulinid fossils,their ages are determined to be Devonian-Permian.
根据所含化石确
形成时代为泥盆纪至二叠纪。
According to the conodont and fusulinid fossils,their ages are determined to be Devonian-Permian.
根据所含化石确形成时代为泥盆纪至二叠纪。
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