Compacted bentonites are one of the best sealing and backfilling clays considered for use in Deep Geological Repositories radioactive wastes. However, an in-depth understanding their behavior after placement repository is required, including if activity indigenous microorganisms affects safety conditions. Here we provide optimized phenol:chloroform based protocol that facilitates higher DNA-yie...

The 100 m thick stratigraphic section exposed at Dinosaur Provincial Park (DPP, southern Alberta) contains bentonites that have been used for more than 30 years to date DPP's rocks and fossils using the K-Ar decay scheme. Limited reproducibility among different vintages of 40Ar/39Ar ages inhibited development a high resolution chronostratigraphy. Here we employ further test recently completed C...

Continental arc volcanism generates a wide diversity of magma compositions, but the tempos compositional variation are unclear. Here, we investigate 7-million year record volcanic ash layers in Cretaceous Eagle Ford Group, which was deposited Western Interior Seaway western North America. Low oxygen conditions prevented significant bioturbation, allowing for preservation hundreds thin form bent...

Abstract Sorption properties of Greek bentonites and zeolites were investigated in raw form after irradiation for removal Cs, Co Eu from aqueous solutions using 137 60 152 as tracers γ-spectroscopy. The sorption experiments undertaken under different conditions (pH, concentration, competitive ions temperature). structural changes the sorbents due to metal examined through XRD, FTIR SEM/EDS. iso...