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Comment on "Bilaterian Burrows and Grazing Behavior at >585 Million Years Ago"

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Science  22 Feb 2013:
Vol. 339, Issue 6122, pp. 906
DOI: 10.1126/science.1230339

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Pecoits et al. (Reports, 29 June 2012, p. 1693) describe bilaterian trace fossils and assign them an Ediacaran age based on the age of a granite interpreted as intrusive. We argue that the granite is not intrusive but in fact represents the basement of the sedimentary succession. Moreover, we show that identical trace fossils occur in nearby Carboniferous-Permian glacigenic rocks.

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