Grypania (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Grypania" in Simple English language version.

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1sciencemag.org

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1royalsocietypublishing.org

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archive.org

M. R. Walter, John H. Oehler & Dorothy Z. Oehler (1976). "Megascopic algae 1,300 million years old from the Belt supergroup, Montana: a reinterpretation of Walcott's Helminthoidichnites". Journal of Paleontology. 50 (5): 872–881. JSTOR 1303584.

geoscienceworld.org

cjes.geoscienceworld.org

Schneider D.A. et al 2006. Age constraints for Paleoproterozoic glaciation in the Lake Superior Region: detrital zircon and hydrothermal xenotime ages for the Chocolay Group, Marquette Range Supergroup. Canadian Journal of Earth Sciences 43, 571-591, [3]

jstor.org

M. R. Walter, John H. Oehler & Dorothy Z. Oehler (1976). "Megascopic algae 1,300 million years old from the Belt supergroup, Montana: a reinterpretation of Walcott's Helminthoidichnites". Journal of Paleontology. 50 (5): 872–881. JSTOR 1303584.

royalsocietypublishing.org

rstb.royalsocietypublishing.org

Knoll, Andrew H. et al 2006. Eukaryotic organisms in Proterozoic oceans. Philosophical Transactions of the Royal Society B 361 (1470): 1023–38. [2]

sciencemag.org

Han T.M. & Runnegar B. 1992. Megascopic eukaryotic algae from the 2.1-billion-year-old negaunee iron-formation, Michigan. Science 257 (5067): 232–235. [1]