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Miospores et acritarches de la formation d'Hydrequent (Frasnien superieur à Famennien Inferieur, Boulonnais, France)
Loboziak, S.; Streel, M.; Vanguestaine, M. (1983). Miospores et acritarches de la formation d'Hydrequent (Frasnien superieur à Famennien Inferieur, Boulonnais, France). Ann. Soc. géol. Belg. (1968) 106(1): 173-183
In: Annales de la Société Géologique de Belgique (1968). Vaillant-Carmanne: Liège. ISSN 0037-9395, more
Peer reviewed article  

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Keywords
    Boulonnais; Famennian; Frasnian; Spores; Acritarcha; Marine

Authors  Top 
  • Loboziak, S.
  • Streel, M., more
  • Vanguestaine, M., more

Abstract
    The upper part of the Hydrequent Shales, which are inserted between the last dolomite layer and the Ste Godeleine Sandstone, consists of at least 20 m of shaly sediments with thin sandy partings. The 44 samples studied have yielded numerous spore and acritarch species which permit a very detailed palynological zonation to be established, mainly corresponding to the upper Frasnian. The highest samples, 0.5 m below the Ste Godeleine Sandstone, can be correlated with the lower Famennian of the Belgian stratotype. The Frasnian-Famennian boundary thus falls within the Hydrequent Shales between 0.5 and 2.5 m below the Ste Godeleine Sandstone.

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