Reworked palynomorphs are commonly found in sedimentary deposits of glacial environments. However, instances of reworking were few times identified in the Carboniferous assemblages of central-western Argentina. In this study, two well-preserved palynological assemblages recovered from shales bearing dropstones of the Majaditas Formation in San Juan province are described for the first time. The palynoflora comprises spores, monosaccate pollen, acritarchs, and prasinophyte. Although in a low proportion (at least 2%), some palynomorphs correspond to reworked specimens of the underlying Devonian and Mississippian successions. The assemblages are indicative of the Subzone A of the Biozone that characterizes the late Serpukhovian-early Bashkirian in the country. Close similarities are evident with other palynofloras described for glaciogenic deposits of the same age in the region.

中文翻译：

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阿根廷马贾迪塔斯组（石炭纪）的孢粉组合：冰川沉积物改造的一个例子

改造后的孢粉型常见于冰川环境的沉积物中。然而，在阿根廷中西部的石炭纪组合中，很少发现改造的实例。在这项研究中，首次描述了从圣胡安省马贾迪塔斯组含落石的页岩中发现的两个保存完好的孢粉组合。孢粉植物群包括孢子、单囊花粉、原生植物和草生植物。尽管比例较低（至少 2%），但一些孢粉型对应于底层泥盆纪和密西西比纪演替的改造标本。这些组合代表了生物带的 A 亚带，该亚带是该国谢尔普霍夫晚期 - 巴什基尔早期的特征。与该地区同龄冰川沉积物描述的其他孢粉植物群有明显的相似之处。