We thank Retallack (2011) for his comment on the paper by Davies et al. (2010). Davies et al. (2010) cast doubts on the terrestrial interpretation of trace-fossil bearing strata of the Ordovician Juniata Formation and thus on their applicability to the study of early terrestrial ecosystems. We do not think that Retallack's (2011) comment on this paper dispels these doubts, for the reasons listed herein. If sedimentary facies analysis were as straightforward as inferred by Retallack (2011) in the first paragraph of his comment, then it would be easy to determine, one way or another, the depositional environment of...

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