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Supercritical‐Flow Deposits: A New Quantitative Tool to Characterise Deep‐Marine Depositional Environments (Oligocene Annot Sandstones, SE France)?

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Title: Supercritical‐Flow Deposits: A New Quantitative Tool to Characterise Deep‐Marine Depositional Environments (Oligocene Annot Sandstones, SE France)?
Authors: Cornard, P. H.1,2 (AUTHOR) cornard@uni‐bremen.de, Pickering, K. T.3 (AUTHOR), Strasser, M.1 (AUTHOR)
Source: Terra Nova. Feb2025, Vol. 37 Issue 1, p49-56. 8p.
Subjects: Paleoenvironmental studies, Sedimentology, Continental slopes, Spatial arrangement, Measuring instruments, Marine sediments, Fluid flow, Sandstone
Geographic Terms: France
Abstract: Despite a growing interest, few studies integrate quantitative supercritical‐flow deposit (SFD) distribution into paleoenvironmental reconstructions in deep‐marine settings. We present a re‐evaluation of the Oligocene Annot Sandstones (SE France) in terms of flow criticality, by examining the spatial distribution of SFDs. Proximal settings exhibit SFD proportion varying from ~90% to 40% with a common occurrence of cyclic steps, whereas distal environments show <40% SFDs with antidunes and upper‐plane beds prevalent. Comparing SFD spatial distribution to other proxies in the Annot Sandstones and published proxies from the Eocene Ainsa‐Jaca basins (Spanish Pyrenees), SFD trends appear more consistent than those in sandstone percentages, or the distribution of the Bouma sequence divisions. Our approach achieves two goals: (1) establishing the reliability of quantitatively analysing SFDs as a proxy for paleoenvironment reconstructions, characterising the proximal‐to‐basin floor transition at ~40% SFDs and (2) providing fundamental insights into the formation processes compared to other proxies. [ABSTRACT FROM AUTHOR]
Copyright of Terra Nova is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Despite a growing interest, few studies integrate quantitative supercritical‐flow deposit (SFD) distribution into paleoenvironmental reconstructions in deep‐marine settings. We present a re‐evaluation of the Oligocene Annot Sandstones (SE France) in terms of flow criticality, by examining the spatial distribution of SFDs. Proximal settings exhibit SFD proportion varying from ~90% to 40% with a common occurrence of cyclic steps, whereas distal environments show &lt;40% SFDs with antidunes and upper‐plane beds prevalent. Comparing SFD spatial distribution to other proxies in the Annot Sandstones and published proxies from the Eocene Ainsa‐Jaca basins (Spanish Pyrenees), SFD trends appear more consistent than those in sandstone percentages, or the distribution of the Bouma sequence divisions. Our approach achieves two goals: (1) establishing the reliability of quantitatively analysing SFDs as a proxy for paleoenvironment reconstructions, characterising the proximal‐to‐basin floor transition at ~40% SFDs and (2) providing fundamental insights into the formation processes compared to other proxies. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Terra Nova is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1111/ter.12746
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 49
    Subjects:
      – SubjectFull: Paleoenvironmental studies
        Type: general
      – SubjectFull: Sedimentology
        Type: general
      – SubjectFull: Continental slopes
        Type: general
      – SubjectFull: Spatial arrangement
        Type: general
      – SubjectFull: Measuring instruments
        Type: general
      – SubjectFull: Marine sediments
        Type: general
      – SubjectFull: Fluid flow
        Type: general
      – SubjectFull: Sandstone
        Type: general
      – SubjectFull: France
        Type: general
    Titles:
      – TitleFull: Supercritical‐Flow Deposits: A New Quantitative Tool to Characterise Deep‐Marine Depositional Environments (Oligocene Annot Sandstones, SE France)?
        Type: main
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            NameFull: Cornard, P. H.
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            NameFull: Pickering, K. T.
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            NameFull: Strasser, M.
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            – D: 01
              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
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              Value: 37
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            – TitleFull: Terra Nova
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