Loading...
Please wait, while we are loading the content...
Similar Documents
Le rôle de l'évolution des paysages holocènes dans le comblement des bas-fonds du Parc national de la Lopé, moyenne vallée de l'Ogooué au Gabon
| Content Provider | Semantic Scholar |
|---|---|
| Author | Obame, Victory Nfoumou M’voubou, Makaya Sebag, David Oslisly, Richard Bremond, Laurent Mounguengui, Michel Mbina Giresse, Pierre |
| Copyright Year | 2017 |
| Abstract | Sedimentological and geochemical ana- lyses and 14C dating were performed for a sedimentary core sample from the Lope 2 marsh in the northern zone of Gabon’s Lope National Park. The results produced a division of the core sample into three main units. The basal part of the core sample was dated to 2,320 years cal BP. At this time, the Lope 2 marsh was a topo- graphic hollow that flooded sporadically during the rainy season. This unit corres- ponds to a soil formation of clay, quartz and highly decomposed organic matter. The upper boundary of this unit corres- ponds to the end of the climatic deterio- ration that affected central Africa around 2,500 years BP. The second unit represents the period from 2,320 to 585 years cal BP. This shows a gradual decrease in the flow of quartz that reflects the increasing rela- tive density of the marsh vegetation as the climate became more humid. The organic matter in this unit is of mixed origin, rela- tively abundant and with a high content of refractory material. The third unit, repre- senting the period from 585 years cal BP to the present, shows plant cover asso- ciated with developing marshland (which began in unit 2) that was sustained by the humid climate. The organic matter here is rich in biological material. |
| Starting Page | 67 |
| Ending Page | 77 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.19182/bft2017.333.a31469 |
| Alternate Webpage(s) | https://hal-univ-perp.archives-ouvertes.fr/hal-01741839/file/31469-32407-1-PB.pdf |
| Alternate Webpage(s) | http://revues.cirad.fr/index.php/BFT/article/download/ID-BFT-170105/31188 |
| Alternate Webpage(s) | http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers17-10/010071195.pdf |
| Alternate Webpage(s) | https://doi.org/10.19182/bft2017.333.a31469 |
| Volume Number | 333 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
