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四川中江石泉至古店地层剖面中保存了极其丰富的晚侏罗—早白垩世介形类化石,笔者研究了其中20属97种在地层中垂直分布规律,从而将过渡层划分为两个亚共存延限带,包括四个生物组合带,讨论了生物地层单位与岩石地层单位的关系,为地层时代的探讨提供了较可靠的依据;该地层剖面露头极好,层序清楚,组段齐全,划分标志明确,生物群属种变化显著,可选作我国非海相侏罗—白垩系过渡层模式剖面。本文记述和图示了介形虫14属44种(其中23新种),丰富了侏罗—白垩纪非海相生物资料。
Sichuan Province, from the Shiquan to Gudian strata profile preserved extremely rich Late Jurassic - Early Cretaceous fossils, the author studied the 20 genera and 97 kinds of vertical distribution in the strata, so that the transitional layer is divided into two sub-Asian Coexistence of delineation zone, including four biological combination zone, discusses the relationship between biostratigraphy units and lithostratigraphic unit, and provides a more reliable basis for the exploration of the stratigraphic period. The stratigraphic section has an excellent profile, clear sequence and complete set of stages , Clear division marks, significant changes in biome species, optional for our non-marine Jurassic - Cretaceous transitional layer profile section. This article describes and illustrates 44 genera (including 23 species) of 14 genera of ostracods, enriching the Jurassic-Cretaceous non-marine biological data.