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 …

Modern dolomite formation caused by seasonal cycling of oxygenic phototrophs and anoxygenic phototrophs in a hypersaline sabkha

ZA Diloreto, S Garg, TRR Bontognali, M Dittrich - Scientific reports, 2021 - nature.com
Abstract The “Dolomite Problem” has been a controversy for over a century, owing to
massive assemblages of low-temperature dolomite in ancient rocks with little dolomite …

[HTML][HTML] Evolution of the Exmouth-Barrow carbonate margin through the Miocene: Insights from 3D seismic data and field investigations (North West Shelf, Australia)

R Riera, V Paumard, J Bourget, T Allan, U Lebrec - Sedimentary Geology, 2023 - Elsevier
Carbonate margins are records of the palaeoclimatology, palaeoceanography and
palaeogeography of continental shelves, and their study can help identify both regional and …

Variability of blue carbon storage in arid evaporitic environment of two coastal Sabkhas or mudflats

ZA Al Disi, K Naja, S Rajendran, H Elsayed… - Scientific Reports, 2023 - nature.com
Coastal Sabkhas are mudflats found in arid coastal regions that are located within the
supratidal zone when high rates of evaporation lead to high salinity. While evaporitic …

[HTML][HTML] Study of diversity of mineral-forming bacteria in Sabkha mats and sediments of mangrove forest in Qatar

TM Farhat, ZA Al Disi, MY Ashfaq, N Zouari - Biotechnology Reports, 2023 - Elsevier
The involvement of microorganisms in carbonate minerals and modern dolomite formation in
evaporitic environments occupied with microbial mats (ie, sabkha) and in mangrove forests …

Lacustrine-evaporitic microbial dolomite from a Plio-Pleistocene succession recovered by the SG-1 borehole in the Qaidam Basin, NE Tibetan Plateau

Y Zhao, X Wei, Z Han, C Han, X Gao, R Meng, Q Wang… - Chemical …, 2023 - Elsevier
Abstract The Plio-Pleistocene evaporitic lacustrine succession in the Qaidam Basin, which
was recovered by drill core SG-1, provides the material for understanding the maturation of …

Characterization of the extracellular polymeric substances (EPS) of Virgibacillus strains capable of mediating the formation of high Mg-calcite and protodolomite

ZA Al Disi, N Zouari, M Dittrich, S Jaoua… - Marine Chemistry, 2019 - Elsevier
The origin of dolomite–a common mineral in the geological record–is the subject of an
ongoing debate. Among different hypotheses, it has been proposed that extracellular …

Ubiquitous occurrence of organogenic dolomite in a late Ediacaran limestone-dominated succession from the Eastern Yangtze Gorges area of South China

Q Xiao, Z Xia, Z She, D Papineau, G Luo, B Chang… - Precambrian …, 2024 - Elsevier
The widespread occurrence of dolostones in Paleozoic and Precambrian sequences stands
in stark contrast to the difficulty of precipitating dolomite in experiments at low temperature …

Salt flat microbial diversity and dynamics across salinity gradient

KM Hazzouri, N Sudalaimuthuasari, EE Saeed… - Scientific reports, 2022 - nature.com
Sabkhas are hypersaline, mineral-rich, supratidal mudflats that harbor microbes that are
adapted to high salt concentration. Sabkha microbial diversity is generally studied for their …

Warm acidified seawater: a dolomite solution

JM Rivers - Journal of Sedimentary Research, 2023 - pubs.geoscienceworld.org
The “dolomite problem” is the product of two distinct observations. First, there are massive
amounts of ancient marine limestone (CaCO3) deposits that have been replaced by the …