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青海北祁连区上三叠统实测剖面南营儿组下部的泥质页岩、炭质页岩、泥质粉砂岩中首次发现保存及分异度尚可的有机壁微体化石,共计孢粉28属35种,疑源类10属12种;其中,蕨类植物孢子占总组合的58.5%,裸子植物花粉占18.9%,疑源类占22.6%,可称为Aratrisporites-Ovalipollis-Micrhystridium孢粉组合。该组合面貌与国内外不同相区的晚三叠世的孢粉组合特征大体相似,可以对比。该组同时产植物化石Danaeopsis fecunda Halle和Neocalamites carcinoides Harris等,是一套在海侵的环境中形成的河湖相沉积,当时气候温暖潮湿。
In the shale, carbonaceous shale and argillaceous siltstone in the lower part of the Nanying’er Formation in the upper Triassic measured section of the northern Qilian area of Qinghai Province, organic wall microfossils with good conservation and differentiation are found for the first time, 28 species belong to 35 genera and 12 species belong to 10 genera. Among them, fern spores accounts for 58.5% of the total assemblage, gymnosperms pollen accounts for 18.9%, and suspected sources account for 22.6%, which may be called Aratrisporites-Ovalipollis-Micrystridium spores Powder combination. The assemblage is similar to the late Triassic sporopollen assemblages in different facies at home and abroad, and can be compared. The group also produces fossil plants Danaeopsis fecunda Halle and Neocalamites carcinoides Harris, etc., is a set of rivers and lakes formed in the transgressive environment deposition, when the climate warm and humid.