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| Escartin, J.; Mevel, C.; Petersen, S.; Bonnemains, D.; Cannat, M.; Andreani, M.; Augustin, N.; Bezos, A.; Chavagnac, V.; Choi, Y.; Godard, M.; Haaga, K.; Hamelin, C.; Ildefonse, B.; Jamieson, J.; John, B.; Leleu, T.; Macleod, C. J.; Massot-campos, M.; Nomikou, P.; Olive, J. A.; Paquet, M.; Rommevaux, C.; Rothenbeck, M.; Steinfuhrer, A.; Tominaga, M.; Triebe, L.; Campos, R.; Gracias, N.; Garcia, R.. |
| Microbathymetry data, in-situ observations, and sampling along the 13°20'N and 13°20'N oceanic core complexes (OCCs) reveal mechanisms of detachment fault denudation at the seafloor, links between tectonic extension and mass wasting, and expose the nature of corrugations, ubiquitous at OCCs. In the initial stages of detachment faulting and high angle fault scarps show extensive mass-wasting that reduces their slope. Flexural rotation further lowers scarp slope, hinders mass wasting, resulting in morphologically complex chaotic terrain between the breakaway and the denuded corrugated surface. Extension and drag along the fault plane uplifts a wedge of hangingwall material (apron). The detachment surface emerges along a continuous moat that sheds rocks and... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00376/48702/49049.pdf |
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| Pastier, A-m; Husson, L.; Pedoja, K.; Bezos, A.; Authemayou, C.; Arias-ruiz, C.; Cahyarini, S. Y.. |
| The variety of coral reefs morphologies highlights their sensitivities to several forcings; fossil reefs stack in sequences that are accordingly diverse. In order to understand their genesis and architectures, we devised a numerical approach, accounting for Quaternary sea level oscillations, vertical land motion, initial slope, wave erosion, and reef growth. We first test our model on the subsiding sequence of Hawaii and on the uplifting sequence of Wangi-Wangi (Sulawesi) that bears active barriers. We then construct a parametric study that we analyze based on a comprehensive yet compact description of sequences as barcodes, that depict the vertical distribution of a few geometrical characteristics (number, width, and height of the terraces and barriers).... |
| Tipo: Text |
Palavras-chave: Coral reefs; Reef terraces; Numerical modeling; Geomorphology. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00637/74917/75771.pdf |
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