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The mechanisms that led to this extraordinary preservation of soft\u2010bodied organisms in fine\u2010 to medium\u2010grained sandstones have been extensively debated. Ediacara\u2010style fossilization is recorded in a variety of sedimentary facies characterized by clean quartzose sandstones (as in the eponymous Ediacara Member) as well as less compositionally mature, clay\u2010rich sandstones and heterolithic siliciclastic deposits. To investigate this preservational process, we conducted experiments using different mineral substrates (quartzose sand, kaolinite, and iron oxides), a variety of soft\u2010bodied organisms (microalgae, cyanobacteria, marine invertebrates), and a range of estimates for Ediacaran seawater dissolved silica (DSi) levels (0.5\u20132.0\u2009mM). These experiments collectively yielded extensive amorphous silica and authigenic clay coatings on the surfaces of organisms and in intergranular pore spaces surrounding organic substrates. This was accompanied by a progressive drawdown of the DSi concentration of the experimental solutions. These results provide evidence that soft tissues can be rapidly preserved by silicate minerals precipitated under variable substrate compositions and a wide range of predicted scenarios for Ediacaran seawater DSi concentrations. These observations suggest plausible mechanisms explaining how interactions between sediments, organic substrates, and seawater DSi played a significant role in the fossilization of the first complex ecosystems on Earth.<\/jats:p>","DOI":"10.1111\/gbi.12615","type":"journal-article","created":{"date-parts":[[2024,8,16]],"date-time":"2024-08-16T10:53:39Z","timestamp":1723805619000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Controls on authigenic mineralization in experimental Ediacara\u2010style preservation"],"prefix":"10.1111","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1100-2373","authenticated-orcid":false,"given":"Silvina","family":"Slagter","sequence":"first","affiliation":[{"name":"Department of Earth &amp; Planetary Sciences Yale University  New Haven Connecticut USA"},{"name":"Instituto de Ciencias de la Ingenier\u00eda Universidad de O'Higgins  Rancagua Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kurt O.","family":"Konhauser","sequence":"additional","affiliation":[{"name":"Department of Earth &amp; Atmospheric Sciences University of Alberta  Edmonton Alberta Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Derek E. 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