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虫形弓笔石和离心弓笔石的变异范围

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摘要 自从国际地层委员会对温洛克统底界再研究以来,在中国紫阳地区找到了许多横过兰多维统至温洛克统的连续剖面,随着调查和研究的深入,必然提出许多新的问题提供给大家讨论。
出处 《地层学杂志》 CSCD 北大核心 2013年第4期604-607,共4页 Journal of Stratigraphy
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参考文献19

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