The succession of vertebrates and plants across the Cretaceous-Tertiary boundary in the Tremp Formation, Ager valley (south-central Pyrenees, Spain).
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...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 1999 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/56781 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/56781 |
| Access Level: | Acceso aberto |
| Palavra-chave: | 56 561 551.7 Cretaceous-Tertiary Boundary Palaeobotany Vertebrates Tremp FM. Pyrenees Limite Crétace-Tertiaire Paleobotanique Formation Tremp Pyrénees Paleontología Geología estratigráfica 2416 Paleontología 2506.19 Estratigrafía |
| Resumo: | 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. |
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