{"refrec":{"BRefID":231496,"RR":"<b>Van Itterbeeck, J.; Sprong, J.; Dupuis, C.; Speijer, R.P.; Steurbaut, E.</b> (2007). Danian/Selandian boundary stratigraphy, paleoenvironment and Ostracoda from Sidi Nasseur, Tunisia. <i>Mar. Micropaleontol. 62(4)</i>: 211-234. <a href=\"http://dx.doi.org/10.1016/j.marmicro.2006.08.006\" target=\"_blank\">dx.doi.org/10.1016/j.marmicro.2006.08.006</a>","BEntID":223208,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Mar. Micropaleontol. 62(4)</i>: 211-234. <a href=\"https://dx.doi.org/10.1016/j.marmicro.2006.08.006\" target=\"_blank\">https://dx.doi.org/10.1016/j.marmicro.2006.08.006</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Van Itterbeeck, J.; Sprong, J.; Dupuis, C.; Speijer, R.P.; Steurbaut, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Van Itterbeeck, J. <i>et al.</i>","Englishabstract":"Two detailed records (NSF and 05NSC, Sidi Nasseur, Tunisia) across the Danian/Selandian (D/S) boundary were investigated for their micropalcontological content. Calcareous nannofossils and planktic foraminifera provided a biostratigraphic framework. The interval spans part of planktic foraminiferal Zone P2, Subzone P3a and part of Subzone P3b. This corresponds to calcareous nannoplankton Zone NP4. Using a more detailed nannofossil zonation the studied section spans part of Zone NTp6, Zone NTp7a and part of NTp7b. Quantitative ostracod and qualitative benthic foraminiferal data were used to characterize environmental changes across the D/S boundary. The two subsections have yielded a total of 50 ostracod taxa. The ostracod assemblage of the entire section belongs to the Southern Tethyan Type showing subtle but distinct changes up section. Based on statistical analysis of the quantitative ostracod data, faunal changes at a glauconitic maker bed (P3a/P3b boundary) were demonstrated. The local Reticulina proteros assemblage, with the typical species R. proteros, Oertliella vesiculosa and Cytheroptheron lekefense, is gradually replaced by the Protobuntonia nakkadii assemblage, with the typical species Cristaeleberis arabii, Xestoleberis tunisiensis, Cytheropteron sp. and P. nakkadii, across the glauconitic bed. The benthic foraminifera also demonstrated distinct changes at this marker bed. The changes in ostracods and foraminifera are related to changes in paleoproductivity and an overall relative sea-level fall.<br>The lithological and faunal changes at the P3a/P3b zone boundary within the Sidi Nasseur sections seem to correspond to the D/S boundary in the type region in Danmark and are characterized by a significant hiatus, yielding this section not suitable as a GSSP candidate for this boundary.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Danian/Selandian boundary stratigraphy, paleoenvironment and Ostracoda from Sidi Nasseur, Tunisia","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Danian/Selandian boundary; Tunisia; tethys; Ostracoda; benthic foraminifera","OtherDescriptors":null,"Notes":null,"AnaPub":2007,"MonPub":null,"DateUpdate":"2015-10-30","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000244969500001","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.marmicro.2006.08.006"},"refs":null,"anarec":{"AnaID":231496,"PubliDate":2007,"Pagination":"211-234","XtraPublOfAnaID":null,"ISBN":null,"Volume":"62","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43516,"SerRR":"Marine Micropaleontology. 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