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  1. Article ; Online: The Cabrières Biota (France) provides insights into Ordovician polar ecosystems.

    Saleh, Farid / Lustri, Lorenzo / Gueriau, Pierre / Potin, Gaëtan J-M / Pérez-Peris, Francesc / Laibl, Lukáš / Jamart, Valentin / Vite, Antoine / Antcliffe, Jonathan B / Daley, Allison C / Nohejlová, Martina / Dupichaud, Christophe / Schöder, Sebastian / Bérard, Emilie / Lynch, Sinéad / Drage, Harriet B / Vaucher, Romain / Vidal, Muriel / Monceret, Eric /
    Monceret, Sylvie / Lefebvre, Bertrand

    Nature ecology & evolution

    2024  Volume 8, Issue 4, Page(s) 651–662

    Abstract: Early Palaeozoic sites with soft-tissue preservation are predominantly found in Cambrian rocks and tend to capture past tropical and temperate ecosystems. In this study, we describe the diversity and preservation of the Cabrières Biota, a newly ... ...

    Abstract Early Palaeozoic sites with soft-tissue preservation are predominantly found in Cambrian rocks and tend to capture past tropical and temperate ecosystems. In this study, we describe the diversity and preservation of the Cabrières Biota, a newly discovered Early Ordovician Lagerstätte from Montagne Noire, southern France. The Cabrières Biota showcases a diverse polar assemblage of both biomineralized and soft-bodied organisms predominantly preserved in iron oxides. Echinoderms are extremely scarce, while sponges and algae are abundantly represented. Non-biomineralized arthropod fragments are also preserved, along with faunal elements reminiscent of Cambrian Burgess Shale-type ecosystems, such as armoured lobopodians. The taxonomic diversity observed in the Cabrières Biota mixes Early Ordovician Lagerstätten taxa with Cambrian forms. By potentially being the closest Lagerstätte to the South Pole, the Cabrières Biota probably served as a biotic refuge amid the high-water temperatures of the Early Ordovician, and shows comparable ecological structuring to modern polar communities.
    MeSH term(s) Animals ; Ecosystem ; Fossils ; Biota ; Arthropods ; Echinodermata
    Language English
    Publishing date 2024-02-09
    Publishing country England
    Document type Journal Article
    ISSN 2397-334X
    ISSN (online) 2397-334X
    DOI 10.1038/s41559-024-02331-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Chengjiang Biota inhabited a deltaic environment.

    Saleh, Farid / Qi, Changshi / Buatois, Luis A / Mángano, M Gabriela / Paz, Maximiliano / Vaucher, Romain / Zheng, Quanfeng / Hou, Xian-Guang / Gabbott, Sarah E / Ma, Xiaoya

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 1569

    Abstract: The Chengjiang Biota is the earliest Phanerozoic soft-bodied fossil assemblage offering the most complete snapshot of Earth's initial diversification, the Cambrian Explosion. Although palaeobiologic aspects of this biota are well understood, the precise ... ...

    Abstract The Chengjiang Biota is the earliest Phanerozoic soft-bodied fossil assemblage offering the most complete snapshot of Earth's initial diversification, the Cambrian Explosion. Although palaeobiologic aspects of this biota are well understood, the precise sedimentary environment inhabited by this biota remains debated. Herein, we examine a non-weathered core from the Yu'anshan Formation including the interval preserving the Chengjiang Biota. Our data indicate that the succession was deposited as part of a delta influenced by storm floods (i.e., produced by upstream river floods resulting from ocean storms). Most Chengjiang animals lived in an oxygen and nutrient-rich delta front environment in which unstable salinity and high sedimentation rates were the main stressors. This unexpected finding allows for sophisticated ecological comparisons with other Burgess Shale-type deposits and emphasizes that the long-held view of Burgess Shale-type faunas as snapshots of stable distal shelf and slope communities needs to be revised based on recent sedimentologic advances.
    MeSH term(s) Animals ; Biological Evolution ; Biota ; Floods ; Fossils ; Minerals ; Rivers
    Chemical Substances Minerals
    Language English
    Publishing date 2022-03-23
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-29246-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: New fossil assemblages from the Early Ordovician Fezouata Biota.

    Saleh, Farid / Vaucher, Romain / Vidal, Muriel / Hariri, Khadija El / Laibl, Lukáš / Daley, Allison C / Gutiérrez-Marco, Juan Carlos / Candela, Yves / Harper, David A T / Ortega-Hernández, Javier / Ma, Xiaoya / Rida, Ariba / Vizcaïno, Daniel / Lefebvre, Bertrand

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 20773

    Abstract: The Fezouata Biota (Morocco) is a unique Early Ordovician fossil assemblage. The discovery of this biota revolutionized our understanding of Earth's early animal diversifications-the Cambrian Explosion and the Ordovician Radiation-by suggesting an ... ...

    Abstract The Fezouata Biota (Morocco) is a unique Early Ordovician fossil assemblage. The discovery of this biota revolutionized our understanding of Earth's early animal diversifications-the Cambrian Explosion and the Ordovician Radiation-by suggesting an evolutionary continuum between both events. Herein, we describe Taichoute, a new fossil locality from the Fezouata Shale. This locality extends the temporal distribution of fossil preservation from this formation into the upper Floian, while also expanding the range of depositional environments to more distal parts of the shelf. In Taichoute, most animals were transported by density flows, unlike the in-situ preservation of animals recovered in previously investigated Fezouata sites. Taichoute is dominated by three-dimensionally preserved, and heavily sclerotized fragments of large euarthropods-possibly representing nektobenthic/nektic bivalved taxa and/or hurdiid radiodonts. Resolving whether this dominance reflects a legitimate aspect of the original ecosystem or a preservational bias requires an in-depth assessment of the environmental conditions at this site. Nevertheless, Taichoute provides novel preservational and palaeontological insights during a key evolutionary transition in the history of life on Earth.
    MeSH term(s) Animals ; Fossils ; Ecosystem ; Biota ; Biological Evolution ; Minerals
    Chemical Substances Minerals
    Language English
    Publishing date 2022-12-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-25000-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Insolation-paced sea level and sediment flux during the early Pleistocene in Southeast Asia.

    Vaucher, Romain / Dashtgard, Shahin E / Horng, Chorng-Shern / Zeeden, Christian / Dillinger, Antoine / Pan, Yu-Yen / Setiaji, Romy A / Chi, Wen-Rong / Löwemark, Ludvig

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 16707

    Abstract: Global marine archives from the early Pleistocene indicate that glacial-interglacial cycles, and their corresponding sea-level cycles, have predominantly a periodicity of ~ 41 kyrs driven by Earth's obliquity. Here, we present a clastic shallow-marine ... ...

    Abstract Global marine archives from the early Pleistocene indicate that glacial-interglacial cycles, and their corresponding sea-level cycles, have predominantly a periodicity of ~ 41 kyrs driven by Earth's obliquity. Here, we present a clastic shallow-marine record from the early Pleistocene in Southeast Asia (Cholan Formation, Taiwan). The studied strata comprise stacked cyclic successions deposited in offshore to nearshore environments in the paleo-Taiwan Strait. The stratigraphy was compared to both a δ
    Language English
    Publishing date 2021-08-18
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-96372-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: A genetic link between Konzentrat- and Konservat-Lagerstätten in the Fezouata Shale (Lower Ordovician, Morocco)

    Vaucher, Romain / Emmanuel L.O. Martin / Hélène Hormière / Bernard Pittet

    Palaeogeography, palaeoclimatology, palaeoecology. 2016 Oct. 15, v. 460

    2016  

    Abstract: In the central Anti-Atlas (Morocco; Zagora region), the Fezouata Shale has yielded an extraordinary fossil Lagerstätte documenting the initial stages of the Great Ordovician Biodiversification Event. This Lagerstätte contains abundant and exceptionally ...

    Abstract In the central Anti-Atlas (Morocco; Zagora region), the Fezouata Shale has yielded an extraordinary fossil Lagerstätte documenting the initial stages of the Great Ordovician Biodiversification Event. This Lagerstätte contains abundant and exceptionally well-preserved fossils (EPF) exhibiting soft-bodied preservation as well as “hard”, mineralized parts of extinct organisms. While soft-bodied preservation in the Fezouata Shale is confined to a few stratigraphic intervals, other fossiliferous intervals contain only shelly fossils in sandstone lenses (SL).Placed in the context of a previously established depositional model, EPF are interpreted as autochthonous assemblages buried by storm deposits, close to storm wave-base. There, the current component of storms is reduced compared to proximal settings and weak oscillation is dominant resulting in the record of oscillation ripples. In contrast, bioclastic accumulations were generated upslope in shallower, more proximal lower shoreface environments. There, the current component of storms was significant, as suggested by the disarticulation of skeletal remains. Bioclastic materials are localized in SL, which are lenses a few tens of centimeters in thickness and a few meters in width and length. These lenses commonly display erosive bases and convex tops, resulting in a lobate or a channel-lobe morphology. A large amount of sediment was thus rapidly deposited, resulting in the rapid burial of allochthonous material across a strongly localized surface of the sea floor.Integrating both sedimentological and paleontological evidence, intervals yielding EPF are considered as Konservat-Lagerstätten (KsL), in contrast with bioclastic accumulations defined as Konzentrat-Lagerstätten (KzL). Thus, KsL assemblages are interpreted to approximate biocenoses, in which organisms experienced rapid burial by distal tempestites, while KzL assemblages more likely correspond to thanatocenoses, locally deposited by storm back-currents. Here, a genetic link between KsL and KzL is suggested within the Fezouata Shale. Both types of Lagerstätten were related to storm activity, but at different depths.
    Keywords biocenosis ; fossils ; models ; sandstone ; sediments ; shale ; storms ; Morocco
    Language English
    Dates of publication 2016-1015
    Size p. 24-34.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 417718-6
    ISSN 0031-0182
    ISSN 0031-0182
    DOI 10.1016/j.palaeo.2016.05.020
    Database NAL-Catalogue (AGRICOLA)

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