Planktonic and benthic foraminifera biostratigraphy


Along with calcareous nannofossils, Foraminifera are the most frequently used group in Mesozoic and Cainozoic biostratigraphy. The biozones are well calibrated with the nannofossil ones and offer a good control. They are small, abundant, diverse and experienced quick evolution which gives them an advantage in biostratigraphic researches. The planktonic foraminifera species provide detailed data used in interbasin and global correlations of Mesozoic and Cenozoic sediments, while benthic foraminifera has a more local application.

Foraminifera have also proved to be valuable in paleoenvironmental interpretations especially in determining the depth of deposition, salinity and climate. The ratio between benthic/planktonic species, species diversity is used to determine the changes in depth. A good use of Foraminifera is seen when mapping microfacies with information on shallowing/deepening.

All biostratigraphy research is accompanied with a report with the following content:

  • Relative age estimations and correlations with the International Stratigraphic chart;
  • Possible integration of the biostratigraphy results with the seismic/sequence stratigraphic framework;
  • Paleoecological and paleoenvironmental reconstructions and possible geohistory analysis of the sedimentary basins based  on biostratigraphy interpretations;
  •  Distribution charts and qualitative/quantative data.