Geologica Belgica

1374-8505 2034-1954

 

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Maurice STREEL, Michel VANGUESTAINE, Andrés PARDO-TRUJILLO & Eric THOMALLA

The Frasnian-Famennian boundary sections at Hony and Sinsin (Ardenne, Belgium): new interpretation based on quantitative analysis of palynomorphs, sequence stratigraphy and climatic interpretation

(volume 3 (2000) — number 3-4 - Volume dédié à Jos BOUCKAERT Herdenkingsnummer)
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Abstract

In the light of recent geochemical and sedimentological investigations, the Frasnian-Famennian Boundary sections at Hony and Sinsin (eastern and central Ardenne, Belgium) are re-evaluated in terms of quantitative analysis of spiny acritarchs and miospores. It is concluded that the shaly interval separating the limestone beds dated Frasnian and Famennian by conodonts corresponds to a transgressive - regressive marine sequence. This interpretation is supported, for the Hony section, by a quantitative analysis of two spiny acritarch groups (Gorgonisphaeridium gr. and Micrhystridium gr.) based on the relationship between their abundance and the depth of the marine environment. It is also corroborated by the frequency distribution of a Prasinophyceae (Maranhites stockmansii) indicative for a maximum flooding surface. A sequence stratigraphic model and the possible causes of the bathymetric changes right at the Frasnian-Famennian Boundary are briefly discussed. It is suggested that these changes are related to a short glacial phase during a "warm mode" period.

Keywords : palynology, Frasnian-Famennian Boundary, Ardenne, Belgium, sequence stratigraphy, paleoclimate

Pour citer cet article

Maurice STREEL, Michel VANGUESTAINE, Andrés PARDO-TRUJILLO & Eric THOMALLA, «The Frasnian-Famennian boundary sections at Hony and Sinsin (Ardenne, Belgium): new interpretation based on quantitative analysis of palynomorphs, sequence stratigraphy and climatic interpretation», Geologica Belgica [En ligne], number 3-4 - Volume dédié à Jos BOUCKAERT Herdenkingsnummer, volume 3 (2000), 271-283 URL : https://popups.ulg.ac.be/1374-8505/index.php?id=2215.

A propos de : Maurice STREEL

University of Liège, Paleontology, Sart-Tilman B 18, B-4000 LIEGE 1, Belgium.

A propos de : Michel VANGUESTAINE

University of Liège, Paleontology, Sart-Tilman B 18, B-4000 LIEGE 1, Belgium.

A propos de : Andrés PARDO-TRUJILLO

Universidad de Caldas, Departamento de Ciencias Geológicas, Calle 65 #26-10, MANIZALES, Columbia.

A propos de : Eric THOMALLA

University of Liège, Paleontology, Sart-Tilman B 18, B-4000 LIEGE 1, Belgium; Rue des Liserons, 107, B-4000 SERAING, Belgium.