Conodonts of the Niluo Member Form Ziyun Area, Guizhou Province, and Their Age Significance

May 1, 2026ACTA MICROPALAEONTOLOGICA SINICA

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This research aims to identify conodont species from the Niluojian Member to determine the geological age of deposits in the Ziyun area.
Conducted profile measurements and sampling in the Niluojian Member and the adjacent Banyang Formation.
Collected conodonts from the carbonate rocks, identifying several key species.
Analyzed the distribution and age range of the collected conodont species.
Identified important conodont species including Budurovignathus mungoensis for the first time in this region, excluding the Guandao profile.
Determined that the Niluojian Member corresponds to late Anisian to late Ladinian of the Mid-Triassic based on conodont assemblages.
Provided significant material for stratigraphical age division and regional correlation in the Nanpanjiang Basin.

Research identifies conodont species, determining geological age in Guizhou's Niluojian Member, suggesting implications for further regional studies.

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谭斌贤 et al. (2026) studied this question.

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