نتایج جستجو برای: glauconite
تعداد نتایج: 125 فیلتر نتایج به سال:
Contourite sediment accumulations at continental margins are related to strong bottom water circulation, where intense winnowing can result in neoformation of authigenic grains glauconite the seafloor. In this study, we investigated whether such could faithfully record ambient bottom-water neodymium (Nd) isotopic compositions, and hence be used as paleoceanographic archives. To purpose, measure...
The Velaux-La Bastide Neuve fossil-bearing site (Bouches-du-Rhône, France) has yielded a diverse vertebrate assemblage dominated by dinosaurs, including the titanosaur Atsinganosaurus velauciensis. We here provide a complete inventory of vertebrate fossils collected during two large-scale field campaigns. Numerous crocodilian teeth occur together with complete skulls. Pterosaur, hybodont shark ...
A combined ultrasonic treatment, with de-ionized H2O, dilute HAc or HCl, of three Mid-Miocene glauconite samples was applied to K–Ar date the different separates in order compare results those obtained by Rb–Sr method using same and that were analyzed strictly way. Two aliquots yield opposite elemental trends, which suggests initial mineral compositions for various pellets. The data two untreat...
The Oligocene of the New Jersey continental margin is divisible into as many as eight sequences and 23 lithofacies associations, documented in a series of seven boreholes across the modern coastal plain. This paper summarizes the sequence architecture of these deposits, interpreted from high-resolution biostratigraphy and Sr-isotope chemostratigraphy, and evaluates the factors that governed pat...
At present time, there is a steady trend of expanding the area grape plantations in Russian Federation. The revival industry caused by number problems, one which lack high-quality planting material. purchase imported seedlings not universal way satisfying vineyards seedlings, due to inability clone varieties soil and climatic conditions growing regions That why it necessary increase yield local...
The present work focuses on the upper Cretaceous (Cenomanian-early Campanian) carbonate successions in selected wells from northwestern Iraq. These are represented by Gir Bir Turonian), Wajna (late Santonian) and Mushorah (early Formations. succession has affected early burial near-surface, unconformity-related deep diagenesis cementation, neomorphism, dolomitization, dedolomitization, silicifi...
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