【摘 要】
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This paper divides the Telychian into 7 graptolite zones, 12 subzones and 4 chitinoans in the Ziyangregion, China. The zones and subzones of England are almost
【机 构】
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Xi',anInstituteofGeologyandMineralResources,NanjingInstituteofGeologyandPalaeontology,?,graduated