Portal de Periódicos da CAPES

Orbital control on exceptional fossil preservation

2018; Geological Society of America; Volume: 47; Issue: 2 Linguagem: Inglês

10.1130/g45598.1

1943-2682

Farid Saleh, Bernard Pittet, Jean‐Philippe Perrillat, Bertrand Lefèbvre,

Geological and Geochemical Analysis

Research Article| December 31, 2018 Orbital control on exceptional fossil preservation Farid Saleh; Farid Saleh * 1Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, ENS de Lyon, CNRS, UMR 5276, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France *E-mail: farid.saleh@univ-lyon1.fr Search for other works by this author on: GSW Google Scholar Bernard Pittet; Bernard Pittet 1Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, ENS de Lyon, CNRS, UMR 5276, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar Jean-Philippe Perrillat; Jean-Philippe Perrillat 1Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, ENS de Lyon, CNRS, UMR 5276, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar Bertrand Lefebvre Bertrand Lefebvre 1Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement, ENS de Lyon, CNRS, UMR 5276, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar Geology (2019) 47 (2): 103–106. https://doi.org/10.1130/G45598.1 Article history received: 14 Sep 2018 rev-recd: 26 Nov 2018 accepted: 29 Nov 2018 first online: 31 Dec 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Farid Saleh, Bernard Pittet, Jean-Philippe Perrillat, Bertrand Lefebvre; Orbital control on exceptional fossil preservation. Geology 2018;; 47 (2): 103–106. doi: https://doi.org/10.1130/G45598.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Exceptional fossil preservation is defined by the preservation of soft to lightly sclerotized organic tissues. The two most abundant types of soft-tissue preservation are carbonaceous compressions and replicates in authigenic minerals. In the geological record, exceptionally preserved soft fossils are rare and generally limited to only a few stratigraphic intervals. In the Fezouata Shale (Lower Ordovician, southern Morocco), we found that deposits yielding pyritized soft tissues contain iron-rich silicate minerals. These minerals played a crucial role in inhibiting the decay of dead individuals and are comparable to those found in formations yielding carbonaceous soft parts around the world. Furthermore, we found that iron-rich minerals show a cyclic pattern of occurrence (of ∼100 k.y. periodicity) implicating a short-period eccentricity control on iron availability through the general oceanic and atmospheric circulations. Our results identify, for the first time, an external climate forcing on exceptional preservation and show that orbital forcing may be a level-selective parameter responsible for the discontinuous occurrence of horizons preserving soft parts around the world. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.