10.1594/PANGAEA.992685Santos, Felipe RodriguesFelipe RodriguesSantos0000-0001-8756-5036Lourenço, Rafael AndréRafael AndréLourençoTaniguchi, SatieSatieTaniguchiMartins, César de CastroCésar de CastroMartinsWainer, Ilana E K CIlana E K CWainer0000-0003-3784-623XMahiques, Michel MichaelovitchMichel MichaelovitchMahiques0000-0002-5249-5610Nagai, Renata HanaeRenata HanaeNagai0000-0002-1358-5074Figueira, Rubens César LopesRubens César LopesFigueira0000-0001-8945-4540Bouloubassi, Ioanna DIoanna DBouloubassiBicego, Marcia CMarcia CBicegoPANGAEA2026alkanesLa Plata Riversouthern Brazilian marginvegetation changesAGEn-Alkane C27, δ13Cn-Alkane C29, δ13Cn-Alkane C31, δ13Cn-Alkane C33, δ13CGravity corerAccelerator mass spectrometry (AMS)Gas chromatograph–combustion–isotope ratio mass spectrometer (GC-C-IRMS), Thermo Scientific, Trace GC Ultra coupled to Delta V Advantage2019-06-02T12:20:00/2019-06-02T13:22:00Dataset159 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset includes compound-specific stable carbon isotope (δ¹³C) values of long-chain n-alkanes (nC27–nC33) from the Holocene marine sediment core MDBT 561, collected on the southern Brazilian continental shelf. Individual n-alkanes were analyzed using gas chromatography–combustion–isotope ratio mass spectrometry (GC-C-IRMS). The compound-specific isotope data provide information on the sources and isotopic composition of terrigenous organic matter delivered to the shelf, supporting reconstructions of vegetation dynamics and continental hydrological variability during the Holocene.-52.21-51.3-33.79-33.27Brazilian southeastern continental shelfSão Paulo Research Foundationhttps://doi.org/10.13039/50110000180717/20344-7Mudbelts of Southern and Southeast Brazil: Implications on anthropogenic influences on the marine environment