Microfossils from the Paleoarchean Eon are the oldest known evidence of life. Despite their significance in understanding the history of life on Earth, any interpretation of the nature of these […]
Paleoarchean
Posted inAI - Data - Apps - Cybernetics, Astrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Status Report, Tricorders & Sensors
Organic Geochemical Evidence For Life In Archean Rocks Identified By Pyrolysis–GC–MS and Supervised Machine Learning
Significance Teasing out biochemical information from ancient organic-rich sediments, notably the timing of the emergence of photosynthesis relative to the inferred oxygenation of Earth’s atmosphere, remains a challenging opportunity. To […]
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Habitable Zones, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Origin & Evolution of Life, ROVs/Submersibles/Diving, Status Report
Magnesium Silicate Chimneys at the Strytan Hydrothermal Field, Iceland, as Analogues for Prebiotic Chemistry at Alkaline Submarine Hydrothermal Vents on the Early Earth
The Strytan Hydrothermal Field (SHF) in basaltic terrain in Iceland is one of the extant alkaline submarine hydrothermal vent systems favoured as analogues for where life on Earth may have […]
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.
Posted inBiophysics, Biosignatures & Paleobiology, Microbiology & Virology, Origin & Evolution of Life, Press Release
Microfossil Qingjiangonema Sheds Light Evolution Of Sulfate-reducing Bacteria In Response To Oxygenation
Microbial sulfate reduction dating back to the Paleoarchean plays a crucial role in driving global carbon and sulfur cycles in ancient and modern Earth.