According to the multiple stratigraphic division of the International stratigraphic Guide, a complete column of lithostratigraphic units of the Yixian Formation has been erected.
以《国际地层指南》的多重地层划分观点为基础，建立了一套完整的义县组岩石岩层单位。
According to the multiple stratigraphic division of the International stratigraphic Guide, a complete column of lithostratigraphic units of the Yixian Formation has been erected.
以《国际地层指南》的多重地层划分观点为基础，建立了一套完整的义县组岩石岩层单位。
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