@misc{245,
  author = {Gerta Keller and Marie-Pierre Bolle and Thierry Adatte},
  title = {Biostratigraphy, mineralogy and geochemistry of the Trabakua Pass and Ermua sections in Spain : Paleocene-Eocene transitions},
  abstract = {<p>Isotopie, geochemical and bulk mineralogical analyses in the Trabakua and Ermua sections. Basque Basin, reveal major changes across the Paleocene- Eocene transition. Expanded sedimentary records exhibit a gradual decrease of 1.0 \%o in 5 "C values in the lower part of Zone P5 followed by a more rapid 3 \%o negative excursion. The 3 \%si S l3C excursion is associated with an abrupt decrease in carbonate sedimentation, increased detrital flux and decreased grain size which suggest changes in marine/atmospheric currents and/or size and structure of the ocean carbon reservoir. The clays recognized at Trabakua record a deep burial diagenesis as indicated by two generations of chlorite. the presence of mixed-layers chlorite-smectite and illite-smectite. the absence of smectite and the near absence of kaolinite. The very low 5 "O values (\&lt;-3.5\%o) throughout the Trabakua and Ermua sections reflect diagenetic al{\textlnot} teration rather than paleotemperatures. Because of deep burial diagenesis and very poorly preserved microfossils. the Trabakua Pass and Ermua sections are not optimal potential stratotypes for the Paleocene-Eocene boundary.\&nbsp; <a href="https://geoweb.princeton.edu/research/keller/pubs/Bolle-1997-EcoGeoHelv.pdf" target="_blank">PDF</a></p>
},
  year = {1998},
  doi = {10.5169/seals-168405},
  language = {eng},
}