other catastrophes in Earth history: Geological Society of America Special Paper 307, pp. 263-277.
*; 1975: Cenozoic planktonic foraminifera zonation and characteristics of index forms: The University of Kansas Paleontological Institute, Article 62, 425 p.

External links

*
*, at the website of the subcommission for stratigraphic information of the ICS
*, at the website of Norges Network of offshore records of geology and stratigraphy

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