The Earth’s critical zone (CZ) extends from the top of vegetation canopies to the base of weathered bedrock. Within this region, rock meets life, as water is stored and released to streams, groundwater and vegetation. However, understanding the complex interactions between vegetation, water cycling, and bedrock weathering remains a grand challenge ...
We provide detailed sedimentological, paleontological, and tephrochronological data on a complex sedimentary succession cropping out in the Tyrrhenian coastal area of central Italy, which was deposited in response to sea-level rise during MIS 7, coeval with the Latera phase of activity in the Vulsini Volcanic District. Diffuse intercalations of pri...
Cette thèse documente les processus physiques impliqués dans l’ouverture puis le remplissage des cavités du Cerro Benítez (Patagonie chilienne) ayant aboutit au piégeage de sédiments riches en restes de mégafaune éteinte et en matériel archéologique d’âge pléistocène, au voisinage de la calotte de glace patagonne, lors de la dernière terminaison gl...
This PhD thesis investigates the influence of climate on the architecture and morphology of Amazonian sediments along the Brazilian Equatorial Margin over the last 3.7-4.1 million years. Using a multidisciplinary approach that incorporates cyclostratigraphy, sequence stratigraphy, and geomorphology, the study primarily fills substantial gaps in the...
The Broadwater Formation, initially defined in 1945, is a Pliocene-aged coarse-grained alluvial deposit in Nebraska and southeastern Wyoming. It is characterized by a complex stratigraphic history and debated geologic interpretations. The formation is a rich resource of groundwater for the citizens of Nebraska and the Central Great Plains. We aim t...
The tidal prism, or the volume of water exchanged from the sea to an estuary from mean low to mean high tide, influences system hydrodynamics and ecological functioning. Since 1884, the tidal prism in Morro Bay, California has been estimated to be decreasing over time due to sedimentation from upstream practices. What is the current tidal prism in ...
The southern limit of the Patagonian Ice Sheet at glacial maxima is poorly constrained due to a paucity of field data. This particularly applies to southern outlet glaciers of the Cordillera Darwin whose full extents have been debated by glacial geologists since 1899 CE, introducing uncertainty into estimates of total ice volume. Here we report on ...
Les études topographiques sont nécessaires à la compréhension de la dynamique du trait de côte. L’utilisation des seuls instruments de mesure topographique comme des GPS de précision ou des lunettes impose une mesure très chronophage et non exhaustive des milieux littoraux. Dans le cas des vasières, le problème majeur réside dans la difficulté d’y ...
On 5–6 July 2017, an unstable atmospheric condition caused an unusual concentration of rainfall above the Northern part of Kyushu Island, triggering a set of hydro-meteorological hazards. Within the affected area, the mountainous subwatershed of the Akatani River was significantly impacted by numerous landslides combined with debris flow and floods...
Les aquifères, constamment rechargés par l'infiltration de l'eau de pluie, sont des réservoirs d'eau souterraine. Celle-ci y est stockée sous forme de nappe phréatique dont la surface libre intersecte parfois celle du relief environnant : l'eau souterraine émerge alors hors de l'aquifère pour s'écouler à la surface. Lorsque l'écoulement est suffisa...
