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New data from Oman ...
New data from Oman indicate benthic high biomass productivity coupled with low taxonomic diversity in the aftermath of the Permian-Triassic Boundary mass extinction
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- Brosse, Morgane (författare)
- Univ Zurich, Palaontol Inst & Museum, Karl Schmid Str 4, CH-8006 Zurich, Switzerland
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- Bucher, Hugo (författare)
- Univ Zurich, Palaontol Inst & Museum, Karl Schmid Str 4, CH-8006 Zurich, Switzerland
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- Baud, Aymon (författare)
- BGC, Parc Rouvraie 28, CH-1018 Lausanne, Switzerland
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- Frisk, Åsa (författare)
- Uppsala universitet,Paleobiologi
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- Goudemand, Nicolas (författare)
- Univ Claude Bernard Lyon 1, Univ Lyon, Inst Genom Fonct Lyon, ENS Lyon,CNRS,UMR 5242, 46 Allee Italie, F-69364 Lyon 07, France
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- Hagdorn, Hans (författare)
- Muschelkalkmuseum, Schlossstr 11, D-74653 Ingelfingen, Germany
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- Nützel, Alexander (författare)
- LMU, Dept Earth & Environm Sci, SNSB Bayer Staatssammlung Palaontol & Geol, GeoBio Ctr,Palaeontol & Geobiol, Richard Wagner Str 10, D-80333 Munich, Germany
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- Ware, David (författare)
- Leibniz Inst Evolut & Biodiversitatsforsch, Museum Nat Kunde, Invalidenstr 43, D-10115 Berlin, Germany
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- Hautmann, Michael (författare)
- Univ Zurich, Palaontol Inst & Museum, Karl Schmid Str 4, CH-8006 Zurich, Switzerland
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(creator_code:org_t)
- 2018-07-31
- 2019
- Engelska.
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Ingår i: Lethaia. - : WILEY. - 0024-1164 .- 1502-3931. ; 52:2, s. 165-187
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A new Early Triassic marine fauna is described from an exotic block (olistolith) from the Ad Daffah conglomerate in eastern Oman (Batain), which provides new insights into the ecology and diversity during the early aftermath of the Permian-Triassic Boundary mass extinction. Based on conodont quantitative biochronology, we assign a middle Griesbachian age to the upper part of this boulder. It was derived from an offshore seamount and yielded both nektonic and benthic faunas, including conodonts, ammonoids, gastropods and crinoid ossicles in mass abundance. This demonstrates that despite the stratigraphically near extinction at the Permian-Triassic Boundary, Crinoidea produced enough biomass to form crinoidal limestone as early as middle Griesbachian time. Baudicrinus, previously placed in Dadocrinidae, is now placed in Holocrinidae; therefore, Dadocrinidae are absent in the Early Triassic, and Holocrinidae remains the most basal crown-group articulates, originating during the middle Griesbachian in the Tethyan Realm. Abundant gastropods assigned to Naticopsis reached a shell size larger than 20 mm and provide another example against any generalized Lilliput effect during the Griesbachian. Whereas the benthic biomass was as high as to allow the resumption of small carbonate factories, the taxonomic diversity of the benthos remained low compared to post-Early Triassic times. This slow benthic taxonomic recovery is here attributed to low competition within impoverished post-extinction faunas.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- benthos
- biotic recovery
- Griesbachian
- Oman
- Permian-Triassic Boundary
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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