[PNAS]. Kerogen, insoluble organic matter preserved in sediments, represents some of the earliest known terrestrial biosignatures which have provided important insights into the origin of life and planetary habitability.
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Posted inAstrogeology, Atmospheres, Climate, Weather, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extinction events, Fossils & Paleontology, Habitable Zones, Impact events, Mapping, Geodesy, Cartography, Bathymetry, Meteorites & Asteroids, Status Report
Effect Of A Giant Meteorite Impact On Paleoarchean Surface Environments And Life
Large meteorite impacts must have strongly affected the habitability of the early Earth. Rocks of the Archean Eon record at least 16 major impact events, involving bolides larger than 10 […]
Posted inAstrogeology, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Fossils & Paleontology, Imaging & Spectroscopy, Microbiology & Virology, Status Report
Nanoparticulate Apatite and Greenalite In The Oldest, Well-preserved Hydrothermal Vent Precipitates
Paleoarchean jaspilites are used to track ancient ocean chemistry and photoautotrophy because they contain hematite interpreted to have formed following biological oxidation of vent-derived Fe(II) and seawater P-scavenging.