Diverse and large Archean microfossil assemblage from the Pilbara Craton -its origin and significance in the early evolution of life-

形态多样的微体化石。3.0对澳大利亚西部皮尔巴拉地区Ga Farrel石英岩进行了综合研究，包括微体化石照片数据积累、微体化石孢粉学提取、三维图像重建、生活史重建和分类分析、寄主硅质岩稀土元素分析和Nano-SIMS元素填图。这些研究的结果与法雷尔石英岩微结构的生物成因一致，并表明太古代的地表生态系统比目前假设的要多样化得多，并且组合包括产氧光合细菌甚至真核生物的可能性。

Morphologically diverse microfossils from the ca. 3.0 Ga Farrel Quartzite in the Pilbara Craton, Western Australia were studied comprehensively, including accumulation of photo data of microfossils, palynological extraction of microfossils, reconstruction of 3-D images, reconstruction of life cycle and taxonomic analyses, analyses of rare-earth elements in host cherts, and Nano-SIMS elemental mapping. The results of these studies are consistent with the biogenicity of the Farrel Quartzite microstructures, and suggest that the surface ecosystem in the Archean was much more diverse than currently postulated and the possibility that the assemblage includes oxygen-producing photosynthetic bacteria and even eukaryotes.