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贵州罗甸县等地发育宾夕法尼亚亚系巴什基尔阶—莫斯科阶的斜坡相沉积地层,含丰富的■类和牙形刺化石。作为莫斯科阶底界重要生物地层标志的牙形刺Streptognathodus expansus,Idiognathoides postsulcatus以及■类化石Profusulinella (Aljutovella) aljutovica,Pro.prisca和Eofusulina在该剖面上均有发现。通过对罗悃剖面宾夕法尼亚亚系巴什基尔阶-莫斯科阶界线附近■类以及牙形刺分布情况的研究,本文采用Idiognathoides postsulcatus的首现(116.8m)作为罗悃剖面莫斯科阶底界的生物地层标志,■类Profusulinella prisca和Pro.aljutovica最早出现的层位与之相近,可以作为界线的辅助标志。
Luodian County of Guizhou and other places to develop the Pennsylvania Bashkir level - Moscow-grade slope facies sedimentary formations, rich in species and dentary fossils. Streptognathodus expansus, Idiognathoides postsulcatus and Profusulinella (Aljutovella) aljutovica, Pro.prisca and Eofusulina, which are important biostratigraphic markers in the basement of Moscow, are found on this profile. By studying the distribution of the Bashkir order-Moscow line in the Peninsula of Pennsylvania in the Loess Plateau and the distribution of conodonts, we use the first appearance (116.8m) of the Idiognathoides postsulcatus as the creature of the bottom boundary of Moscow in the Loess Plateau Stratigraphic markers, â ... ¢ The earliest occurrences of the class â € "Profusulinella prisca and Pro.aljutovica are closely related and can serve as aids to the boundaries.