The Pliensbachian/Toarcian boundary (Pl/To) event precedes by ca. 1 Myr the onset of Toarcian Oceanic Anoxic Event. It corresponds to a second order mass extinction associated with an outstanding collapse shallow marine ecosystems at global scale. Yet, our knowledge about its exact driver(s) and unfolding is relatively ambiguous due numerous hiatuses present in sedimentary record during this cr...

Abstract The late Cambrian Steptoean positive carbon isotope excursion (SPICE) represents a major perturbation to the global cycle and was associated with trilobite extinctions expansion of anoxic and/or euxinic water masses during episodes eustatic sea-level change. We present new Re-Os age together Os Nd stratigraphy major- trace-element data from Alum Shale Formation (Scania, Sweden). 494.6 ...

Deltaic wetlands are among the most biodiverse systems on earth, provide important ecosystem services, and are natural buffers against violent storms and hurricanes. Marine processes change the planar configuration and internal stratigraphy of deltaic wetlands, and understanding their contribution to wetlands development and deterioration processes is a key issue for society. In this thesis, fi...

Microwave radar amplitude within a snowpack can be strongly influenced by spatial variability of internal layer boundaries. We quantify the impact of spatial averaging of snow stratigraphy and physical snowpack properties on surface scattering from near-nadir frequency-modulated continuous-wave radar at 12–18 GHz. Relative permittivity, density, grain size and stratigraphic boundaries were meas...