Les échinodermes du Paléozoïqueinférieur de Montagne Noire: Biostratigraphie et paléodiversité
Abstract
Early Palaeozoic echinoderm faunas from Montagne Noire represent some of the richest and most diversified assemblages known so far. This situation results from their interest and from more than one century of active research. Study of echinoderms and associated faunas allows us to place them in a well-defined regional stratigraphical framework extending from the Middle Cambrian up to the Arenig, and to illustrate the influence of palaeoenvironnents in the distribution and diversity of echinoderms. Montagne Noire faunas show strong affinities with other assemblages from the northern margin of Gondwana (palaeogeographical implications). Variations in the biodiversity of Cambro-Ordovician echinoderms from Montagne Noire indicate that the radiation observed at the base of the Ordovician may result, at least partly, from a too imperfect knowledge of Upper Cambrian faunas.
- Publication:
-
Géobios
- Pub Date:
- 1999
- DOI:
- Bibcode:
- 1999Geobi..32..353V
- Keywords:
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- Montagne Noire;
- Cambrien;
- Ordovicien;
- Échinodermes;
- Paléoenvironnement;
- Paléogéographie