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Chitinozoans and the age of the Soom Shale, an Ordovician black shale Lagerstatte, South Africa
Vandenbroucke, T.R.A.; Gabbott, S.E.; Paris, F.; Aldridge, R.J.; Theron, J.N. (2009). Chitinozoans and the age of the Soom Shale, an Ordovician black shale Lagerstatte, South Africa. J. Micropalaeontol. 28(1): 53-66. dx.doi.org/10.1144/jm.28.1.53
In: Journal of Micropalaeontology. Geological Society: London?. ISSN 0262-821X; e-ISSN 2041-4978, meer
Peer reviewed article  

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Trefwoorden
    Geological time > Phanerozoic > Paleozoic > Palaeozoic > Ordovician > Ordovician, Upper > Hirnantian
    Chitinozoa
    Africa, South Africa [Marine Regions]
    Marien
Author keywords
    Hirnantian; chitinozoans; Soom Shale; Lagerstatte; Ordovician-Silurian boundary

Auteurs  Top 
  • Vandenbroucke, T.R.A., meer
  • Gabbott, S.E.
  • Paris, F.
  • Aldridge, R.J.
  • Theron, J.N.

Abstract
    Isolated chitinozoans from the Soom Shale Member of the Cedarberg Formation, SW South Africa are described and provide a date of the latest Hirnantian–earliest Rhuddanian. The recovered chitinozoans are typical of the latest Ordovician Spinachitina oulebsiri Biozone, although an earliest Silurian age is possible. They indicate a very short time span (less than 1 Ma) across the Ordovician–Silurian boundary. This is currently the highest biostratigraphical resolution attainable for the Soom Shale Lagerstätte. Correlation of the Soom Shale chitinozoans with identical assemblages in post-glacial, transgressive deposits of Northern Africa is possible; both faunas occur in shales that overlie glacial diamictites of the Hirnantian glaciation. A new species, Spinachitina verniersi n. sp. is described.

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