Framboidal pyrite shroud confirms the ‘death mask' model for moldic preservation of ediacaran soft-bodied organisms—a reply

Liu, Alexander G. (2017) Framboidal pyrite shroud confirms the ‘death mask' model for moldic preservation of ediacaran soft-bodied organisms—a reply. PALAIOS, 32 (3). pp. 197-198. ISSN 0883-1351 DOI 10.2110/palo.2016.104

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Official URL: http://doi.org/10.2110/palo.2016.104

Abstract

Thin, laterally extensive veneers of framboidal pyrite on fossiliferous bedding planes in eastern Newfoundland, Canada, provide evidence for post-burial microbially mediated pyritization of the seafloor in the late Ediacaran Period (Liu 2016). Pyrite is inferred to have formed on the external surfaces of soft-bodied organisms and microbial matgrounds as a result of bacterial sulfate reduction, consistent with the ‘death mask' taphonomic model for Ediacaran moldic preservation (Gehling 1999). Retallack (2017) accepts the evidence presented by Liu (2016) for early diagenetic pyritization of bedding planes in Newfoundland, and seems to offer at least tacit acceptance of evidence for modern oxidation of that pyrite, its widespread occurrence in global Ediacaran localities, and the potential influence of sedimentary pyrite burial on global Ediacaran oxygen concentrations. However, Retallack questions whether the presence of such pyrite veneers can be taken to demonstrate the ‘death mask' taphonomic model, and specifically queries the source of the observed pyrite.

Item Type: Article
Additional Information: The linkl to the original paper may be found here:http://palaios.geoscienceworld.org/content/31/5/259 and at the University of Bristol oublications repository here:http://bit.ly/2osLuWk
Uncontrolled Keywords: 2017AREP; IA72;
Subjects: 04 - Palaeobiology
Divisions: 04 - Palaeobiology
08 - Green Open Access
Journal or Publication Title: PALAIOS
Volume: 32
Page Range: pp. 197-198
Identification Number: 10.2110/palo.2016.104
Depositing User: Sarah Humbert
Date Deposited: 03 Apr 2017 10:23
Last Modified: 28 Apr 2017 16:34
URI: http://eprints.esc.cam.ac.uk/id/eprint/3862

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