Abstract Oxygen-isotope thermometry played a critical role in the rise of modern geochemistry and remains extensively used (bio-)geoscience. Its theoretical foundations rest on assumption that 18 O/ 16 O partitioning among water carbonate minerals primarily reflects thermodynamic equilibrium. However, after decades research, there is no consensus true equilibrium fractionation between calcite ( α cc/w ). Here, we constrain relations linking temperature, , clumped isotopes Δ 47 ) based...

The constraint of temperature evolution in coastal environments is an important factor deciphering the Earth’s global climatic history. In this study, we reconstruct sea-surface palaeotemperatures from oxygen stable isotope compositions four marine molluscs families Paris Basin during Palaeogene. combination several taxa living different used to limit uncertainties related influence salinity variations on palaeotemperature estimations. One family bivalves (oysters) and three gastropods...

The ostracod fauna from the outcroup "la falunière" of Grignon (Lutetian, Paris Basin): stratigraphical implications.The rehabilitation (shell marl pit) allowed for first time to take an almost complete section Basin Middle Lutetian under its uncimented facies. It was opportunity undertake sedimentological and paleontological studies. This publication presents results ostracode study. More than 6000 valves or carapaces were collected 87 species distinguished. Three new are described :...

Abstract Understanding the geodynamic and Earth surface processes at origin of post-collisional uplift in mountain ranges requires reconstruction paleo-elevation. Here, we focus on topographic evolution Cerdanya Basin eastern Pyrenees formed by post-orogenic extension during Late Miocene. Stable isotope (δ 18 O) analyses small rodent teeth biogenic carbonates show basin uplifted 500 m since 6.5 Ma. These new paleoaltitudes constraints when combined with regional geology geophysical data...

Abstract. During the Middle Miocene, Earth shifted from a warm state, Miocene Climatic Optimum (MCO; 16.9–14.7 Ma), to colder state associated with formation of extensive and permanent ice sheets on Antarctica. This climatic shift, Transition (MMCT; 14.7–13.8 Ma) strongly affected composition structure major biomes, ocean circulation, precipitation patterns. Although climate dynamics are well documented in marine records, our knowledge terrestrial change is not constrained. Here we present...

For decades, Mesozoic tectono-halokinetic structures have been increasingly recognized in the peripheral French alpine basins. However, reconstructing full history and mechanisms of halokinesis during these regions remains challenging due to overprinting effects Cenozoic compressive tectonics, which erased much evidences earlier deformations.This severely limits our understanding interplay between diapirism, sedimentary processes basins, role pre-compressional inheritances shaping internal...

Evaporite distribution and mobility is a key parameter in the structuration of salt bearing sedimentary basins where these layers can generate halokinetic deformations. Recent revisions compressive basin models, including those external Alps, highlight significant role tectonics. However, identifying pre-compression deformations often challenging due to erosion or misinterpretation. The “Baronnies provençales”, located Vocontian western Alps (France), display...

Litter pollution is a global concern, occurring in all oceans, including deep benthic habitats, where the extent of problem remains largely unexplored. Characterization litter on river banks and beaches have been standardized OSPAR convention. In sea, marine assessments result from "punctual” observations seabed by remotely operated vehicle (ROV) imaging, generally conducted during biodiversity survey cruises, or trawling, with limited data rocky areas vulnerable ecosystems. Additionally,...

Lithospheric delamination involves short-lived crustal and surface responses, alkaline magmatism, high heat flow extension. In the Western Mediterranean, is hypothesized to have triggered uplift at origin of Messinian Salinity Crisis (MSC). But as primary cause questioned due insufficient temporal resolution. We report new U-Pb ages clumped isotope analyses from calcite veins formed in an eastern Betic intramontane basin. They reveal a brief fluid event 8.5 5 Ma linked extension retreating...

Abstract Although the Neuquén basin in Argentina forms a key transitional domain between south‐central Andes and Patagonian Andes, its Cenozoic history is poorly documented. We focus on sedimentologic tectonic evolution of southern part this basin, at 39–40°30′S, based study 14 sedimentary sections. provide evidence that underwent alternating erosion deposition reworked volcaniclastic material continental fluvial settings during Neogene. In particular, basement uplift Sañico Massif, due to...

We make use of the cosmogenic nuclide 10Be exposure to date an alluvial terrace Aspe River in foothills northwestern Pyrenees. Initially ascribed Rissian glaciation, our dating shows that was abandoned at 18 ± 2 kyr. In reference Late Pleistocene climatic chronology, two kinds terraces can be distinguished: high-standing fill probably deposited during glacial events and lower cut-in-fill strath cut postglacial river incision. A part aggradations could have occurred Würmian episodes. Hence,...

The Benin continental margin was formed during the breakup of Gondwana through oblique rifting along transform faults. evolution topography following directly affects sedimentary basins, which has major implications for hydrocarbon exploration in region. Quantitative constraints on erosion across are limited to Cenozoic, based analysis dissected lateritic palaeolandscapes. To resolve Mesozoic history, we have obtained apatite fission-track and single-grain (U–Th–Sm)/He data from 18 samples...

Abstract A morphostructural analysis of a Pliocene flood basalt formation in the southern Neuquén basin (40°S) shows evidence contractional deformation less than 3.5 Ma ago. This exhibits general dip towards south‐east, with relict outcrops located 100 m higher main source volcano, which suggests local tilting lava flow. tilt has been brought about by Plio‐Quaternary reactivation eastern border Sañico Massif along two thrusts that offset Another long‐wavelength bulge part flow unit indicates...

Abstract. During the Middle Miocene, Earth shifted from a warm state, Miocene Climatic Optimum (MCO, 16.9–14.7 Ma), to colder state associated with formation of extensive and permanent ice sheets on Antarctica. This climatic shift, Transition (MMCT, 14.7–13.8 Ma) strongly affected composition structure major biomes, ocean circulation, as well precipitation patterns. Although climate dynamics are documented in marine records, our knowledge terrestrial change is not constrained. Here we...