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Showing results for tags 'belmont dazergues'.
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This specimen is missing part of the body chamber, but it displays very well nevertheless what size the shell of this ammonite had reached. This is the index fossil for the European bifrons zone. Literature: Rulleau, L. (1979): Geologie et Paleontologie des Carrières Lafarge à Belmont (Rhone), Section Geol. d. Comité d'Entreprise de l'usine du Val d'Azergues Howarth, M.K. (1992): The Ammonite Family Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society.
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- a727
- belmont dazergues
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This is the index fossil for the variabilis zone, the lowermost biozone of the European Toarcian. Literature: Rulleau, L. (1979): Geologie et Paleontologie des Carrières Lafarge à Belmont (Rhone), Section Geol. d. Comité d'Entreprise de l'usine du Val d'Azergues Howarth, M.K. (1992): The Ammonite Family Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society.
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- a726
- belmont dazergues
- (and 5 more)
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This is the index fossil for the fallaciosum subzone. Literature: Rulleau, L. (1979): Geologie et Paleontologie des Carrières Lafarge à Belmont (Rhone), Section Geol. d. Comité d'Entreprise de l'usine du Val d'Azergues Rulleau, L. (2001): Les Grammoceratinae du Toarcien Superieur de la Region Lyonaisse, SectionGeol.d.Comité d'Entreprise de l'usine du Val d'Azergues Howarth, M.K. (1992): The Ammonite Family Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society.
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- a733
- belmont dazergues
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This ammonite gives its species name to the so-called "Comptum bank", which is widespread in Europe, as well as the comptum subzone. The ribs are more pronounced and the whorls are wider than by L.opalinum. Literature: Rulleau, L. (1979): Geologie et Paleontologie des Carrières Lafarge à Belmont (Rhone), Section Geol. d. Comité d'Entreprise de l'usine du Val d'Azergues Rulleau, L. (1997): Les Ammonites de l'Aalénien de la region lyonnaise, Minéreaux et Fossiles #251, Mai 1997
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- a743
- belmont dazergues
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I recently tried to find out in which formation this was found and discovered to my consternation that the French don't apply formation names to their lithology. The iron sulphide rich limestone matrix of the Leioceras Beds give the fossils an attractive color. Literature: Rulleau, L. (1979): Geologie et Paleontologie des Carrières Lafarge à Belmont (Rhone), Section Geol. d. Comité d'Entreprise de l'usine du Val d'Azergues Rulleau, L. (1997): Les Ammonites de l'Aalénien de la region lyonnaise, Minéreaux et Fossiles #251, Mai 1997
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- a735
- belmont dazergues
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(and 4 more)
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