Here we present techniques for, and new data from, in situ carbon isotope (dC) analysis of Precambrian permineralized microscopic fossils with a reproducibility of 1–2& using secondary ion mass spectrometry (SIMS). Individual microfossils, selected for their excellent preservation, were analyzed in petrographic thin sections of stromatolitic cherts from the Proterozoic Gunflint ( 1880 Ma), Bitt...

Agić, H. 2015. Palaeobiology and diversification of Proterozoic-Cambrian photosynthetic eukaryotes. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1308. 47 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9389-9. One of the most important events in the history of life is the evolution of the complex, eukaryotic cell. The eukaryote...

Fourier transform infrared spectroscopy (FTIR) provides a rapid non-destructive molecular characterization of organic and inorganic material in geological samples. Combination qualitative semi-quantitative approaches are routinely used FTIR study kerogen coals. A diversity descriptors straightforward tools to characterize type, composition structure. However, only few these applied the chemical...

The present contribution provides a study of calcareous nannofossils and siliceous microfossils from the Sawai Bay Formation on Car Nicobar Island, northern Indian Ocean. Two stratigraphically short sediment intervals near have been examined. Qualitative quantitative microfossil analyses show ‘A’ Section to be devoid microfossils, while 24 well-preserved nannofossil taxa are identified. ‘B’ yie...

Abstract Early-middle Ediacaran organic-walled microfossils from the Doushantuo Formation studied in several sections Yangtze Gorges area, South China, show ornamented cyst-like vesicles of very high diversity. These are diagenetically permineralized and observed petrographic thin-sections chert nodules. Exquisitely preserved specimens belonging to seven species Appendisphaera , Mengeosphaera T...