【摘要】 作者首次对柳区砾岩夹层中的泥岩和泥质粉砂岩进行了孢粉学研究,共鉴定出52个形态属。其孢粉组合特征是:以被子植物花粉占优势(62.77%—83.19%),其次是裸子植物花粉(11.95%—32.31%),蕨类植物孢子最少(4.80%—10.38%)。被子植物花粉以具孔类为主,三孔沟或三沟类花粉在组合中有一定含量。裸子植物花粉以具双气囊类居多。孢粉植物群的总体特征表明其时代可能为古近纪晚期。当时的古植被为落叶阔叶林或针阔混交林,气候较温暖湿润,主要为暖温带的环境。更多还原

【Abstract】 This paper reports the first palynological study of interlayers of mudstones and mud-sandstone in the Liuqu Conglomerates.Fifty-two genera were identified in this palynological assesmblage.The assemblage are characterzed by the predominant angiosperm pollen grains(62.77%—83.19%) .The second common group is gymnosperm pollens(11.95%—32.31%) ,and pteridophyte spores are relatively rare(4.80%—10.38%) .Among the angiosperm pollens the most abundant are porate pollens,followed by tricolporate and tricolpate pollens in a moderate percentage.Bisaccate pollens dominate the gymnosperm pollens.The palynological assemblage from the Liuqu Conglomerates suggests a age of the Late Paleogene and a broad-leaved deciduous forest or mixed with conifer-broad-leaved forest,showing a warm-temperate climatic condition.更多还原