The volcano-sedimentary succession of the Cerro Piche Graben, Río Negro province, Patagonia (Argentina), was studied U–Pb and Lu–Hf in zircon. As well, a stratigraphic, sedimentological, palynology review paleoflora content made. combined stratigraphic geochronological study on indicates that Graben developed during Early Jurassic allow us to propose Formation. This formation is composed lower ...

Processes controlling preservation and accumulation of organic matter (OM) in marine sediments are highly sensitive towards both natural anthropogenic impacts. Thus, the sedimentary OM is considered a key proxy for characterization recent past environments . Along Peruvian continental margin (PCM), high primary production an intense oxygen minimum zone (OMZ) favor sediments. Spatial variations ...

Abstract The Mississippian (Tournaisian–Visean) of the Jbel Asdaf area in Tisdafine Basin (Eastern Anti-Atlas, Morocco) has been, for first time, subject a palynological study. This work aims to describe lithological and paleontological composition Aït Yalla Tinerhir Formations, then refine age, reconstruct paleoenvironment assess thermal maturity organic matter. studied section is subdivided, ...

The Middle Jurassic in the north Western Desert, Egypt, was a time of complex tectonics and increased environmental perturbations attributed to predominant sedimentation organic carbon-rich fine siliciclastic carbonate deposits Khatatba Formation. Although some studies have addressed hydrocarbon potential source rock characteristics Formation, regional-scale investigation prevalent paleoenviron...

Abstract. ???????Late Paleocene deposition of an organic-rich sedimentary facies on the continental shelf and slope New Zealand eastern Australia has been linked to short-lived climatic cooling terrestrial denudation following sea level fall. Recent studies confirm that organic matter in this facies, termed “Waipawa organofacies”, is primarily origin, with a minor marine component. It also unus...

Late Carboniferous to early Permian organic-rich sedimentary successions of late-orogenic continental basins from the northeastern Massif Central (France) coincide with both Variscan mountain dismantling and acme long-lasting Paleozoic Ice Age. Here, we investigate carbon nitrogen cycles in newly dated Decize–La Machine Autun during these geodynamic climate upheavals. The organic matter has bee...