Science. 1973 Mar 30;179(4080):1319-21. doi: 10.1126/science.179.4080.1319.
An assemblage of cellularly well-preserved, filamentous and spheroidal plant microfossils has been detected in a cherty pisolite bed of the late Precambrian Chuar Group from the eastern Grand Canyon of the Colorado River. This newly discovered microflora, probably among the youngest Precambrian biological communities now known, appears to be of both evolutionary and biostratigraphic significance.
在科罗拉多河东大峡谷晚前寒武纪 Chuar 群的燧石豆石层中，发现了一组细胞保存完好的丝状和球状植物微化石组合。这个新发现的微化石群可能是目前已知的最年轻的前寒武纪生物群落之一，具有进化和生物地层学意义。
