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Showing 1 to 8 of 8 for “"Ichnofossils"”.
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Earliest Cambrian - latest Proterozoic ichnofossils and problematic fossils from Inyo County, California
<p>A stratigraphic collection of ichnofossils and problematic body fossils was made from Lower Cambrian to Upper Proterozoic (<em>sensu</em> Cloud, 1973) strata of Inyo County, California. Specimens were collected from the Wyman, Reed, Deep Spring, and Campito Formations in the White-Inyo Mountains …
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Análise das pegadas fósseis de tetrápodes do Permiano Superior da Bacia do Paraná
… The material comprises six samples with ichnofossils from Rio do Rasto Formation (São Jerônimo da Serra, PR) and others 25 from lrati Formation (Guapirama, PR, Portelândia e Perolândia, GO), besides 21 photographies and two plastic maps drew on the footprints from Corumbataí Formation …
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Stratigraphy And Depositional Environments Of Lower And Middle Cambrian Strata In The Lake Mead Region, Southern Nevada And Northwestern Arizona
… and Arenicoloides, Corophioides, and Skolithos ichnofossils. The collective presence of these structures indicates that Lower and Middle Cambrian rocks in the study area were deposited in shallow-subtidal to supratidal settings; The proposed depositional model incorporates an east-west oriented …
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Investigating Microbial Trace-fossils and Abiotic Alteration in Hydrovolcanic Tuffs of the Fort Rock Volcanic Field, Oregon
Microbial ichnofossils in volcanic rocks provide a significant record of subsurface microbes and potentially extraterrestrial biosignatures. Here, the textures, mineralogy, and geochemistry of two continental basaltic hydrovolcanic deposits - Reed Rocks and Black Hills - in the Fort Rock Volcanic …
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Planetary Materials Science and Astrobiology
… and the preservation mechanisms of microbial ichnofossils in basaltic glass. These studies all concern the emergence and development of terrestrial planets and habitable environments within them, and the preservation of records of biological activity through deep geologic time. This work …
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Evaluation of tridactyl theropod tracks in southern Africa: quantitative morphometric analysis across the Triassic–Jurassic boundary
… of the TJB remains unknown. Although diverse ichnofossils attributed to Saurischians and Ornithischians are preserved in the Stormberg Group, the record is dominated by isolated tridactyl tracks that can be assigned to common ichnogenera like Grallator, Eubrontes and Kayentapus. Ideally, these …
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Extinction and recovery dynamics of Triassic-Jurassic macro-invertebrate communities
… while the coverage, richness and body size of ichnofossils increased during the recovery. The Chile Tr/J section records low richness, but the ecological complexity and richness decreases through the interval and composition records high turnover, while the dominance increases. The results …
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Tephrostratigraphy, petrography, geochemistry, age and fossil record of the Ganigobis Shale Member and associated glaciomarine deposits of the Dwyka Group, Late Carboniferous, southern Africa
… Shale Member”. An abundance of marine macro- and ichnofossils as well as extrabasinally derived ashfall tuff beds characterise the more than 40 m thick mudstones and provide the basis for an integrated high-resolution biostratigraphic and tephrostratigraphic framework. The Ganigobis Shale Member …