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Frontiers Review: Experimental analysis of soft-tissue fossilization – opening the black box

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posted on 08.02.2018, 11:33 by Mark A. Purnell, Philip J. C. Donoghue, Sarah E. Gabbott, Maria McNamara, Duncan J. E. Murdock, Robert S. Sansom
Taphonomic experiments provide important insights into fossils that preserve the remains of decay-prone soft tissues – tissues that are usually degraded and lost prior to fossilization. These fossils are among the most scientifically valuable evidence of ancient life on Earth, giving us a view into the past that is much less biased and incomplete than the picture provided by skeletal remains alone. Although the value of taphonomic experiments is beyond doubt, a lack of clarity regarding their purpose and limitations, and ambiguity in the use of terminology, are hampering progress. Here we distinguish between processes that promote information retention and those that promote information loss in order to clarify the distinction between fossilization and preservation. Recognising distinct processes of decay, mineralization and maturation, the sequence in which they act, and the potential for interactions, has important consequences for analysis of fossils, and for the design of taphonomic experiments. The purpose of well-designed taphonomic experiments is generally to understand decay, maturation, and preservation individually, thus limiting the number of variables involved. Much work remains to be done, but these methodologically reductionist foundations will allow researchers to build towards more complex taphonomic experiments and a more holistic understanding and analysis of the interactions between decay, maturation and preservation in the fossilization of non-biomineralized remains. Our focus must remain on the key issue of understanding what exceptionally preserved fossils reveal about the history of biodiversity and evolution, rather than on debating the scope and value of an experimental approach.

Funding

MAP, SEG and DJEM funded by NERC grant NE/K004557/1; PCJD by Royal Society Wolfson Merit Award and NERC NE/P013678/1, DJEM by a Leverhulme Trust Early Career Fellowship, MMN by a European Research Council Starting Grant H2020-20140-ERC-StG-637691-ANICOLEVO, RSS by NERC fellowship NE/I020253/2 and BBSRC grant BB/N015827/1.

History

Citation

Palaeontology, 2018

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/School of Geography, Geology and the Environment

Version

AM (Accepted Manuscript)

Published in

Palaeontology

Publisher

Wiley for Palaeontological Association

issn

0031-0239

eissn

1475-4983

Acceptance date

31/01/2018

Copyright date

2018

Available date

20/03/2019

Publisher version

https://onlinelibrary.wiley.com/doi/abs/10.1111/pala.12360

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en

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