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- W2003090492 abstract "The first age constraint on the upper part of the pre-Upper Ordovician series of the Pyrenees is presented. Data are based on acritarchs from the Jujols Group in the La Molina area on the southern slope of the Canigó massif, near the Upper Ordovician unconformity. The new data allow us to attribute a Late Cambrian (Furongian) to Early Ordovician age to the upper part of the Jujols Group and to support the absence of well developed Middle Ordovician strata in the Pyrenees. Our results confirm the occurrence of an Upper Ordovician unconformity and highlight the “Sardic” affinity of the pre-Upper Ordovician sequences in the Pyrenees. These sequences differ markedly from the pre-Upper Ordovician series of the Iberian Massif. L’âge de la partie supérieure de la succession anté-Ordovicien supérieur des Pyrénées est estimé, pour la première fois, à partir de la description d’acritarches provenant du Groupe de Jujols, dans des niveaux proches de la discontinuité de l’Ordovicien supérieur, dans la région de la Molina, sur le versant sud du massif du Canigou. L’analyse de cet assemblage permet de proposer un âge Cambrien supérieur (Furongien) à Ordovicien inférieur pour la partie supérieure du Groupe de Jujols et de mettre en évidence l’absence de dépôts de l’Ordovicien moyen dans les Pyrénées. Ces résultats confirment donc l’existence d’une discontinuité à la base de l’Ordovicien supérieur. Il en résulte que la succession anté-Ordovicien supérieur des Pyrénées témoigne d’affinités « sardes », ainsi que de différences très nettes avec le reste du Massif ibérique." @default.
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- W2003090492 date "2012-01-01" @default.
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- W2003090492 title "First biostratigraphical constraints on the pre-Upper Ordovician sequences of the Pyrenees based on organic-walled microfossils" @default.
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- W2003090492 doi "https://doi.org/10.1016/j.crte.2011.12.003" @default.
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