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青海省三叠纪地层发育、分布很广,占全省总面积的二分之一以上。原认为三叠纪地层以中、上三叠统为主,根据孢粉研究资料显示的特征修正为以下三叠统(包括部分原订为二叠纪的地层)为主,中、上三叠统次之或断续分布。首次对青海省的早三叠世孢子花粉组合,按地层分区进行了全面的归纳整理,识别出了5个地层群或组的9个孢粉组合,并讨论了其地层意义及对比等问题。华北区以下环仓组及赛尔贡切组组合为代表,分别以Lundbladispora或Aratrisporites的高含量为特征,并与少量Micrhystridium共生;过渡区以洪水川组的组合为代表,以Taeniaeporites及/或Limatulasporites/Tubermonocolpites的高含量为特征,并与少量Micrhystridium,Baltisphaeridium共存;华南区以下巴颜喀拉山群及池塘群组合为代表,以Lundbladispora较高含量为特征,并与Veryhachium为主的疑源类共存。同时讨论了孢粉的地层意义及对比等问题,建议将原布青山群划入下巴颜喀拉山群。
Triassic strata in Qinghai Province developed and distributed widely, accounting for more than one-half of the total area of the province. The Triassic strata were originally thought to be dominated by Middle and Upper Triassic and were revised to the following Triassic (including part of the original Permian strata) according to the characteristics shown by the pollen research data. The Middle and Upper Triassic Unified or intermittent distribution. For the first time, the pollen assemblages of the early Triassic spores in Qinghai Province were comprehensively summarized and classified according to the stratigraphic division. Nine sporo-pollen assemblages of five stratigraphic groups or groups were identified, and their significance of stratigraphy and comparison were discussed. The following Huancang Formation and Saiergongshe Formation combination in North China area are represented by the high content of Lundbladispora or Aratrisporites respectively and coexist with a few Micrhystridium. The transitional area is represented by the combination of Hongshuichuan and Taenia eporites and / or Limatulasporites / Tubermonocolpites, and coexisted with a few Micrystridium and Baltisphaeridium. The combination of the Bayan Harness and Pond Group below South China is characterized by higher Lundbladispora content and coexistence with Veryhachium-dominated . At the same time, the significance of stratum of sporopollen and its contrast are discussed. It is suggested that the original cloth Qingshan group should be assigned to the chinkela group in the chin.