Microorganisms from the Late Precambrian of the Grand Canyon, Arizona

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Science  30 Mar 1973:
Vol. 179, Issue 4080, pp. 1319-1321
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.