{"refrec":{"BRefID":250052,"RR":"<b>Yoshida, H.; Ujihara, A.; Minami, M.; Asahara, Y.; Katsuta, N.; Yamamoto, K.; Sirono, S.; Maruyama, I.; Nishimoto, S.; Metcalfe, R.</b> (2015). Early post-mortem formation of carbonate concretions around tusk-shells over week-month timescales. <i>NPG Scientific Reports 5(14123)</i>: 7 pp. <a href=\"http://dx.doi.org/10.1038/srep14123\" target=\"_blank\">http://dx.doi.org/10.1038/srep14123</a>","BEntID":241752,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 5(14123)</i>: 7 pp. <a href=\"http://dx.doi.org/10.1038/srep14123\" target=\"_blank\">http://dx.doi.org/10.1038/srep14123</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Yoshida, H.; Ujihara, A.; Minami, M.; Asahara, Y.; Katsuta, N.; Yamamoto, K.; Sirono, S.; Maruyama, I.; Nishimoto, S.; Metcalfe, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Yoshida, H. <i>et al.</i>","Englishabstract":"Carbonate concretions occur in sedimentary rocks of widely varying geological ages throughout the world. Many of these concretions are isolated spheres, centered on fossils. The formation of such concretions has been variously explained by diffusion of inorganic carbon and organic matter in buried marine sediments. However, details of the syn-depositional chemical processes by which the isolated spherical shape developed and the associated carbon sources are little known. Here we present evidence that spherical carbonate concretions (diameters f : 14 ~ 37mm) around tusk-shells (<i>Fissidentalium</i> spp.) were formed within weeks or months following death of the organism by the seepage of fatty acid from decaying soft body tissues. Characteristic concentrations of carbonate around the mouth of a tusk-shell reveal very rapid formation during the decay of organic matter from the tusk-shell. Available observations and geochemical evidence have enabled us to construct a ‘Diffusion-growth rate cross-plot’ that can be used to estimate the growth rate of all kinds of isolated spherical carbonate concretions identified in marine formations. Results shown here suggest that isolated spherical concretions that are not associated with fossils might also be formed from carbon sourced in the decaying soft body tissues of non-skeletal organisms with otherwise low preservation potential.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Early post-mortem formation of carbonate concretions around tusk-shells over week-month timescales","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-15 01:32:44.487264","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2015-09-24","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000361174700001","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/srep14123"},"refs":null,"anarec":{"AnaID":250052,"PubliDate":2015,"Pagination":"7 pp","XtraPublOfAnaID":null,"ISBN":null,"Volume":"5","Issue":"14123","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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