False biosignatures on Mars: anticipating ambiguity
S McMahon, J Cosmidis - Journal of the Geological Society, 2022 - lyellcollection.org
It is often acknowledged that the search for life on Mars might produce false positive results,
particularly via the detection of objects, patterns or substances that resemble the products of …
particularly via the detection of objects, patterns or substances that resemble the products of …
The link between biomineralization and fossilization of bacteria: insights from field and experimental studies
Fossil biominerals and fossils of microorganisms in ancient rocks contain important
biogeochemical signals. Decoding this record may reveal crucial information about the …
biogeochemical signals. Decoding this record may reveal crucial information about the …
[图书][B] Geomicrobiology
HL Ehrlich, DK Newman - 2008 - taylorfrancis.com
Uncovers the Key Role Microbes Play in the Transformation of Oxidizable and Reducible
MineralsMany areas of geomicrobial processes are receiving serious attention from …
MineralsMany areas of geomicrobial processes are receiving serious attention from …
Potential role of nitrite for abiotic Fe (II) oxidation and cell encrustation during nitrate reduction by denitrifying bacteria
N Klueglein, F Zeitvogel, YD Stierhof… - Applied and …, 2014 - Am Soc Microbiol
Microorganisms have been observed to oxidize Fe (II) at neutral pH under anoxic and
microoxic conditions. While most of the mixotrophic nitrate-reducing Fe (II)-oxidizing bacteria …
microoxic conditions. While most of the mixotrophic nitrate-reducing Fe (II)-oxidizing bacteria …
Self-assembly of biomorphic carbon/sulfur microstructures in sulfidic environments
J Cosmidis, AS Templeton - Nature Communications, 2016 - nature.com
In natural and laboratory-based environments experiencing sustained counter fluxes of
sulfide and oxidants, elemental sulfur (S0)—a key intermediate in the sulfur cycle—can …
sulfide and oxidants, elemental sulfur (S0)—a key intermediate in the sulfur cycle—can …
[HTML][HTML] Early entombment within silica minimizes the molecular degradation of microorganisms during advanced diagenesis
Most ancient organic microfossils delicately preserved in 3D have been found in cherts.
Although entombment within silica has been shown to promote morphological preservation …
Although entombment within silica has been shown to promote morphological preservation …
Characterization of Ca-phosphate biological materials by scanning transmission X-ray microscopy (STXM) at the Ca L2, 3-, P L2, 3-and C K-edges
Several naturally occurring biological materials, including bones and teeth, pathological
calcifications, microbial mineral deposits formed in marine phosphogenesis areas, as well …
calcifications, microbial mineral deposits formed in marine phosphogenesis areas, as well …
What do we really know about the role of microorganisms in iron sulfide mineral formation?
Iron sulfide mineralization in low-temperature systems is a result of biotic and abiotic
processes, though the delineation between these two modes of formation is not always …
processes, though the delineation between these two modes of formation is not always …
Pushing Raman spectroscopy over the edge: purported signatures of organic molecules in fossil animals are instrumental artefacts
Widespread preservation of fossilized biomolecules in many fossil animals has recently
been reported in six studies, based on Raman microspectroscopy. Here, we show that the …
been reported in six studies, based on Raman microspectroscopy. Here, we show that the …
Comprehensive stable isotope investigation of marine biogenic apatite from the late Cretaceous–early Eocene phosphate series of Morocco
Fossil biogenic apatites were studied for their geochemical composition across the late
Cretaceous–early Eocene Moroccan phosphate series in the Ouled Abdoun and Ganntour …
Cretaceous–early Eocene Moroccan phosphate series in the Ouled Abdoun and Ganntour …