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The succession of vertebrates and plants across the Cretaceous-Tertiary boundary in the Tremp Formation, Ager valley (south-central Pyrenees, Spain).

López Martínez, Nieves and Fernández Marrón, María Teresa and Valle, María F. (1999) The succession of vertebrates and plants across the Cretaceous-Tertiary boundary in the Tremp Formation, Ager valley (south-central Pyrenees, Spain). Geobios, 32 (4). pp. 617-627. ISSN 0016-6995

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Abstract

The Tremp Formation red beds in the Ager valley (Fontllonga section, Lleida, Spain) have yielded
plants (macrorests, palynomorphs) and vertebrates (teeth, bones, eggshells and footprints) at different levels from
Early Maastrichtian to Early Palaeocene. A decrease in diversity affected both, plants and vertebrates, but not synchronously.
Plant diversity decreases early in the Maastrichtian, while the change in vertebrate assemblages (sudden
extinction of the dinosaurs) occurs later on, at the Cretaceous-Tertiary (K/T) boundary. This pattern agrees with
the record of France and China, but contrasts with that of North American Western Interim; where both changes
coincide with the K/T boundary.
[RÊSUMÊ] - Les dépôts continentaux de la Formation Tremp dans la vallge d'Ager (coupe de Fontllonga, Lleida,
Spain) ont fourni des fossiles de plantes (palynomorphes et macrorestes) et de vertebras (ossements, dents, oeufs et
traces) dates du Maastrichtien inférieur-Paléocène inférieur. Les deux groupes montrent une réduction de la diversity
mais celle-ci n'est pas synchrone: la crise floraie a eu lieu pendant le Maastrichtien, et celle des vertebras terrestres
s'est passée plus tard, à la limite K/T. Ceci est en accord avec les donn~es de la France et de la Chine, mais
contraste avec celles du Western Interior de l'Amérique du Nord où les deux changements coíncident avec la limite
Crétacé-Tertiaire.

Item Type:Article
Uncontrolled Keywords:Cretaceous-Tertiary Boundary, Palaeobotany, Vertebrates, Tremp FM., Pyrenees Limite Crétace-Tertiaire, Paleobotanique, Vertebrates, Formation Tremp, Pyrénees
Subjects:Sciences > Geology > Paleontology
Sciences > Geology > Stratigraphic geology
ID Code:10528
Deposited On:26 Apr 2010 10:50
Last Modified:02 Sep 2010 08:07

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