Separating ecological assemblages using stable isotope signals: Late paleocene to early eocene planktic foraminifera, DSDP Site 577

Gangyi Lu, Gerta Keller

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Analysis of late Paleocene to early Eocene planktic foraminifera from DSDP Site 577 indicates the presence of two and possibly three isotopically and morphologically distinct assemblages. The surface dwelling assemblage includes species with pustulate-muricate wall texture (e.g., species of the genera Morozovella, Acarinina, Igorina, and Muricoglobigerina). This assemblage is characterized by light δ18O values and large interspecific δ13C variation. It accounts for 82% of the population. The subsurface dwelling assemblage includes species with cancellate-pitted and smoothed-granulate wall textures (e.g., species of the genera Subbotina, "Turborotalia," Planarotalites, Pseudohastigerina, and Chiloguembelina). This assemblage is characterized by heavier δ18O values and small interspecific δ13C variation. It accounts for 14% of the population. The questionable deep dwelling assemblage includes some species with pitted wall texture (e.g., species of the genus "Planorotalites"). This assemblage is characterized by the heaviest δ18O values and accounts for only 4% of the population.

Original languageEnglish (US)
Pages (from-to)103-112
Number of pages10
JournalJournal of Foraminiferal Research
Volume26
Issue number2
DOIs
StatePublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Palaeontology

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