Late neoproterozoic geobiology of the Kimberley region, Northwestern Australia

Zhongwu Lan

    Research output: ThesisDoctoral Thesis

    Abstract

    [Truncated abstract] Neoproterozoic successions are well exposed in the Kimberley region, northwestern Australia. They comprise siliciclastic and carbonate rocks recording two glacial episodes equivalent to the Marinoan and Gaskiers glaciations. Microbially induced sedimentary structures (MISS) are found in the interglacial Ranford and Throssell Shale Formation and in the postglacial Yurabi and Flat Rock Formations. Ediacaran body fossils and trace fossils are relatively rare throughout the Neoproterozoic in Kimberley. Twenty-two morphological types of MISS from Kimberley are recognised, with nine from the Ranford Formation, four from the Throssell Shale, seven from the Yurabi Formation, and three from the Flat Rock Formation. The MISS from the Ranford Formation include erosional remnants (ER), erosional pockets (EP), linear ridges (LR), honeycomb-like wrinkle structure (HLWS), spindle shaped sand crack fills (SSSCF), palimpsest ripples (PR), irregular sand crack fills (ISCF), triradiate cracks (TC), and multidirectional linear ridges (MLR). The Throssell Shale MISS are characterized by irregular bulges (IB), ‘elephant skin’ wrinkle structure (ESWS), pinnacles/tufts (P/T), and drag folded bedding surfaces (DFBS). Alignment of quartz grains (AQG), micrite laminae (ML), pyrite-concentrated laminae (PCL), gas domes (GD), bamboo leaf-like cracks (BLC), worm-like cracks (WLC), and polygonal cracks (PC) were found from the Yurabi Formation. The Flat Rock MISS includes gas domes (GD), millimetre-scale ripples (MR), and ripple patches (RP). Of these, TC, MLR, RB, and ML are reported for the first time from the Neoproterozoic worldwide...
    LanguageEnglish
    QualificationDoctor of Philosophy
    StateUnpublished - 2011

    Fingerprint

    crack
    sedimentary structure
    ripple
    shale
    micrite
    dome
    fill
    rock
    Ediacaran
    sand
    trace fossil
    bamboo
    elephant
    gas
    Postglacial
    carbonate rock
    interglacial
    drag
    glaciation
    skin

    Cite this

    @phdthesis{ab552979f2be45a8a6769ab5f5c9fb64,
    title = "Late neoproterozoic geobiology of the Kimberley region, Northwestern Australia",
    abstract = "[Truncated abstract] Neoproterozoic successions are well exposed in the Kimberley region, northwestern Australia. They comprise siliciclastic and carbonate rocks recording two glacial episodes equivalent to the Marinoan and Gaskiers glaciations. Microbially induced sedimentary structures (MISS) are found in the interglacial Ranford and Throssell Shale Formation and in the postglacial Yurabi and Flat Rock Formations. Ediacaran body fossils and trace fossils are relatively rare throughout the Neoproterozoic in Kimberley. Twenty-two morphological types of MISS from Kimberley are recognised, with nine from the Ranford Formation, four from the Throssell Shale, seven from the Yurabi Formation, and three from the Flat Rock Formation. The MISS from the Ranford Formation include erosional remnants (ER), erosional pockets (EP), linear ridges (LR), honeycomb-like wrinkle structure (HLWS), spindle shaped sand crack fills (SSSCF), palimpsest ripples (PR), irregular sand crack fills (ISCF), triradiate cracks (TC), and multidirectional linear ridges (MLR). The Throssell Shale MISS are characterized by irregular bulges (IB), ‘elephant skin’ wrinkle structure (ESWS), pinnacles/tufts (P/T), and drag folded bedding surfaces (DFBS). Alignment of quartz grains (AQG), micrite laminae (ML), pyrite-concentrated laminae (PCL), gas domes (GD), bamboo leaf-like cracks (BLC), worm-like cracks (WLC), and polygonal cracks (PC) were found from the Yurabi Formation. The Flat Rock MISS includes gas domes (GD), millimetre-scale ripples (MR), and ripple patches (RP). Of these, TC, MLR, RB, and ML are reported for the first time from the Neoproterozoic worldwide...",
    keywords = "Late Neoproterozoic, Geobiology, MISS, Fossil structures, Kimberley region, Northwestern Australia",
    author = "Zhongwu Lan",
    year = "2011",
    language = "English",

    }

    Late neoproterozoic geobiology of the Kimberley region, Northwestern Australia. / Lan, Zhongwu.

    2011.

    Research output: ThesisDoctoral Thesis

    TY - THES

    T1 - Late neoproterozoic geobiology of the Kimberley region, Northwestern Australia

    AU - Lan,Zhongwu

    PY - 2011

    Y1 - 2011

    N2 - [Truncated abstract] Neoproterozoic successions are well exposed in the Kimberley region, northwestern Australia. They comprise siliciclastic and carbonate rocks recording two glacial episodes equivalent to the Marinoan and Gaskiers glaciations. Microbially induced sedimentary structures (MISS) are found in the interglacial Ranford and Throssell Shale Formation and in the postglacial Yurabi and Flat Rock Formations. Ediacaran body fossils and trace fossils are relatively rare throughout the Neoproterozoic in Kimberley. Twenty-two morphological types of MISS from Kimberley are recognised, with nine from the Ranford Formation, four from the Throssell Shale, seven from the Yurabi Formation, and three from the Flat Rock Formation. The MISS from the Ranford Formation include erosional remnants (ER), erosional pockets (EP), linear ridges (LR), honeycomb-like wrinkle structure (HLWS), spindle shaped sand crack fills (SSSCF), palimpsest ripples (PR), irregular sand crack fills (ISCF), triradiate cracks (TC), and multidirectional linear ridges (MLR). The Throssell Shale MISS are characterized by irregular bulges (IB), ‘elephant skin’ wrinkle structure (ESWS), pinnacles/tufts (P/T), and drag folded bedding surfaces (DFBS). Alignment of quartz grains (AQG), micrite laminae (ML), pyrite-concentrated laminae (PCL), gas domes (GD), bamboo leaf-like cracks (BLC), worm-like cracks (WLC), and polygonal cracks (PC) were found from the Yurabi Formation. The Flat Rock MISS includes gas domes (GD), millimetre-scale ripples (MR), and ripple patches (RP). Of these, TC, MLR, RB, and ML are reported for the first time from the Neoproterozoic worldwide...

    AB - [Truncated abstract] Neoproterozoic successions are well exposed in the Kimberley region, northwestern Australia. They comprise siliciclastic and carbonate rocks recording two glacial episodes equivalent to the Marinoan and Gaskiers glaciations. Microbially induced sedimentary structures (MISS) are found in the interglacial Ranford and Throssell Shale Formation and in the postglacial Yurabi and Flat Rock Formations. Ediacaran body fossils and trace fossils are relatively rare throughout the Neoproterozoic in Kimberley. Twenty-two morphological types of MISS from Kimberley are recognised, with nine from the Ranford Formation, four from the Throssell Shale, seven from the Yurabi Formation, and three from the Flat Rock Formation. The MISS from the Ranford Formation include erosional remnants (ER), erosional pockets (EP), linear ridges (LR), honeycomb-like wrinkle structure (HLWS), spindle shaped sand crack fills (SSSCF), palimpsest ripples (PR), irregular sand crack fills (ISCF), triradiate cracks (TC), and multidirectional linear ridges (MLR). The Throssell Shale MISS are characterized by irregular bulges (IB), ‘elephant skin’ wrinkle structure (ESWS), pinnacles/tufts (P/T), and drag folded bedding surfaces (DFBS). Alignment of quartz grains (AQG), micrite laminae (ML), pyrite-concentrated laminae (PCL), gas domes (GD), bamboo leaf-like cracks (BLC), worm-like cracks (WLC), and polygonal cracks (PC) were found from the Yurabi Formation. The Flat Rock MISS includes gas domes (GD), millimetre-scale ripples (MR), and ripple patches (RP). Of these, TC, MLR, RB, and ML are reported for the first time from the Neoproterozoic worldwide...

    KW - Late Neoproterozoic

    KW - Geobiology

    KW - MISS

    KW - Fossil structures

    KW - Kimberley region

    KW - Northwestern Australia

    M3 - Doctoral Thesis

    ER -