The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps
Deciphering the impact of short-term or long-term forcing on fluvial incision, as well as understanding the influence of local (channel lithology and morphology) and global (tectonic motions) parameters in the spatial variation of incision efficiency, are ongoing geomorphological research fields. To...
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Académie des sciences
2023-07-01
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| Series: | Comptes Rendus. Géoscience |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.216/ |
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| author | Cardinal, Thibaut Petit, Carole Rolland, Yann Schwartz, Stéphane Valla, Pierre Gaston Scalabrino, Bruno Audin, Laurence Bertauts, Maxime Zerathe, Swann Thiéblemont, Denis Braucher, Régis Team, ASTER |
| author_facet | Cardinal, Thibaut Petit, Carole Rolland, Yann Schwartz, Stéphane Valla, Pierre Gaston Scalabrino, Bruno Audin, Laurence Bertauts, Maxime Zerathe, Swann Thiéblemont, Denis Braucher, Régis Team, ASTER |
| author_sort | Cardinal, Thibaut |
| collection | DOAJ |
| description | Deciphering the impact of short-term or long-term forcing on fluvial incision, as well as understanding the influence of local (channel lithology and morphology) and global (tectonic motions) parameters in the spatial variation of incision efficiency, are ongoing geomorphological research fields. To shed new light on these issues, we chose to study the “Hautes Gorges du Verdon” (High Verdon Gorges or HVG), located in the foreland of the Southwestern Alps. We collected 24 samples along three polished surfaces for Cosmic Ray Exposure (CRE) $^{36}$Cl dating, which allowed us to constrain short-term incision rates ranging from 0.06 to 0.2 mm/yr between 60 and 15 ka. Compared to known regional uplift and denudation rates, incision rates obtained in the HVG suggest tectonic or isostatic uplift as the main driver of Verdon River incision in the Late Quaternary. This comparison allows us to propose that the downcutting of the Verdon Gorges started approximatively 1.5 to 2 Ma ago, even if the drainage network of the Verdon catchment area could have been shaped earlier, during the Messinian salinity crisis. |
| format | Article |
| id | doaj-art-3f149e8c0fdd450aad0039fd732ca355 |
| institution | Kabale University |
| issn | 1778-7025 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj-art-3f149e8c0fdd450aad0039fd732ca3552025-02-07T10:41:48ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252023-07-01356S226528710.5802/crgeos.21610.5802/crgeos.216The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French AlpsCardinal, Thibaut0Petit, Carole1https://orcid.org/0000-0002-8798-1168Rolland, Yann2https://orcid.org/0000-0001-9547-6092Schwartz, Stéphane3https://orcid.org/0000-0001-7942-7071Valla, Pierre Gaston4https://orcid.org/0000-0001-6525-5416Scalabrino, Bruno5Audin, Laurence6https://orcid.org/0000-0002-4510-479XBertauts, Maxime7Zerathe, Swann8https://orcid.org/0000-0002-4020-5823Thiéblemont, Denis9https://orcid.org/0000-0002-0605-7150Braucher, Régis10Team, ASTER11Université Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis 06560 Valbonne, FranceUniversité Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis 06560 Valbonne, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, France; Université Savoie Mont Blanc, CNRS, Pôle Montagne, Edytem, F-73370 Le Bourget-du-Lac, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, FranceUniversité Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis 06560 Valbonne, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, FranceUniversité Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, 38000 Grenoble, FranceDGR/CGEO, BRGM, B.P. 6009, 45060 Orléans, Cedex, FranceUniversité Aix-Marseille, CNRS-IRD-Collège de France-INRAE, UM 34 CEREGE, Technopôle de l’Environnement Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, FranceASTER Team: Georges Aumaître, Didier L. Bourlès † , Karim Keddadouche; Université Aix-Marseille, CNRS-IRD-Collège de France-INRAE, UM 34 CEREGE, Technopôle de l’Environnement Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, FranceDeciphering the impact of short-term or long-term forcing on fluvial incision, as well as understanding the influence of local (channel lithology and morphology) and global (tectonic motions) parameters in the spatial variation of incision efficiency, are ongoing geomorphological research fields. To shed new light on these issues, we chose to study the “Hautes Gorges du Verdon” (High Verdon Gorges or HVG), located in the foreland of the Southwestern Alps. We collected 24 samples along three polished surfaces for Cosmic Ray Exposure (CRE) $^{36}$Cl dating, which allowed us to constrain short-term incision rates ranging from 0.06 to 0.2 mm/yr between 60 and 15 ka. Compared to known regional uplift and denudation rates, incision rates obtained in the HVG suggest tectonic or isostatic uplift as the main driver of Verdon River incision in the Late Quaternary. This comparison allows us to propose that the downcutting of the Verdon Gorges started approximatively 1.5 to 2 Ma ago, even if the drainage network of the Verdon catchment area could have been shaped earlier, during the Messinian salinity crisis.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.216/QuaternaryGeomorphologyCRE $^{36}$Cl datingFluvial incisionGorges |
| spellingShingle | Cardinal, Thibaut Petit, Carole Rolland, Yann Schwartz, Stéphane Valla, Pierre Gaston Scalabrino, Bruno Audin, Laurence Bertauts, Maxime Zerathe, Swann Thiéblemont, Denis Braucher, Régis Team, ASTER The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps Comptes Rendus. Géoscience Quaternary Geomorphology CRE $^{36}$Cl dating Fluvial incision Gorges |
| title | The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps |
| title_full | The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps |
| title_fullStr | The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps |
| title_full_unstemmed | The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps |
| title_short | The interplay of geology, climate and tectonics on river incision: the example of the High Verdon Gorges, Southwestern French Alps |
| title_sort | interplay of geology climate and tectonics on river incision the example of the high verdon gorges southwestern french alps |
| topic | Quaternary Geomorphology CRE $^{36}$Cl dating Fluvial incision Gorges |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.216/ |
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