During the past decade, Environmental and Field Emission Scanning Electron Microscopes have been used at the NASA/Marshall Space Flight Center to investigate freshly fractured interior surfaces of a large number of different types of meteorites. Large, complex, microfossils with clearly recognizable biological affmities have been found embedded in several carbonaceous meteorites. Similar forms ...

Initially, Raman spectroscopy was a specialized technique used by vibrational spectroscopists; however, due to rapid advancements in instrumentation and imaging techniques over the last few decades, Raman spectrometers are widely available at many institutions, allowing Raman spectroscopy to become a widespread analytical tool in mineralogy and other geological sciences. Hyperspectral imaging, ...

Evidence of Archean life: Stromatolites and microfossils J. William Schopf a,∗, Anatoliy B. Kudryavtsev b, Andrew D. Czaja c, Abhishek B. Tripathi c a Department of Earth and Space Sciences, Center for the Study of Evolution and the Origin of Life (Institute of Geophysics and Planetary Physics), Molecular Biology Institute, and NASA Astrobiology Institute, University of California, Los Angeles,...

Geological materials such as rock fragments, microfossils and mineral grains are continuously being entrained (i.e. reworked) into soil during natural weathering processes. Distinctive reworked types in soil, specific components of them palynomorphs (organic microfossils), can prove extremely useful forensic investigations, i.e. to connect (match) people places. If the outcrop area a unique is ...

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc This discussion paper is/has been under review for the journal Climate of the Past (CP). Please refer to the corresponding final paper in CP if available. Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Climate sensitivity is a crucial parameter in global temperature...

doi: 10.1130/G25637.1 2010;38;143-146 Geology Francis A. Macdonald, Phoebe A. Cohen, Francis O. Dudás and Daniel P. Schrag and the Yukon Territory Early Neoproterozoic scale microfossils in the Lower Tindir Group of Alaska Email alerting services articles cite this article to receive free e-mail alerts when new www.gsapubs.org/cgi/alerts click Subscribe to subscribe to Geology www.gsapubs.org/s...

The oldest reported occurrence of cryptospores supposed to derive from land plants (embryophytes) is currently considered be in the Middle Ordovician. two genera Virgatasporites and Attritasporites, described 1960ʹs Early Ordovician (Tremadocian) Algeria, are morphologically close miospores, therefore pose a dilemma, because these spore-like microfossils recorded before first appearance plant d...