Présence d'une mangrove à Avicennia au Miocène moyen dans la région de Digne (Alpes-de-Haute-Provence,France) : implications stratigraphiques et paléoclimatiques |
| |
| Authors: | Jean-Jacques Châteauneuf Hugues Bauer Isabelle Cojan |
| |
| Institution: | 1. 8, quai du Châtelet, 45000 Orléans, France;2. École des mines de Paris, CGES–Sédimentologie, 35, rue Saint-Honoré, 77300 Fontainebleau, France |
| |
| Abstract: | Avicennia pollen grains have been discovered in marine facies from the Middle Miocene deltaic series of Châteauredon (southeastern France). Based on the local stratigraphy, an age between 15.8 and 16.5 Ma is proposed for these grains. The age and the transgressive context of the Avicennia bearing-levels are in agreement with the maximum extension of the mangrove known in the western Mediterranean during interval N8–NN4 pro parte, in relation with the Langhian highstand. This mangrove occurrence at 42°N latitude during Middle Miocene is a more northern witness of the mangrove sites known in Languedoc and Provence areas. It also implies a lower climatic gradient than today. To cite this article: J.-J. Châteauneuf et al., C. R. Geoscience 338 (2006). |
| |
| Keywords: | SE France Châteauredon Digne Mangrove Palynologie Miocène moyen Optimum climatique SE France Châteauredon Digne Mangrove Palynology Middle Miocene Climatic optimum |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
