Continuous versus pulsed origination and extinction and biozones

• Autorzy: Trammer J.

Identyfikatory

DOI

10.2478/agp-2014-0020

• Języki publikacji: EN

Abstrakty

EN

The count of biozones as an approximate measure of the origination and extinction rates of index taxa (mostly species) is proposed. The mean number of extinctions of these taxa per m.y. is 1.136 (Palaeozoic mean 0.902, Mesozoic mean 1.680, Cenozoic mean 0.789). In contrast with the majority of taxa, the originations and extinctions of index taxa, as well as of other taxa belonging to biostratigraphically important systematic groups, seems to be continuous.

Słowa kluczowe

EN

origination; extinction; rates; biozones

PL

powstawanie; wygaśnięcie; tempo; okres

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2014
• Tom: Vol. 64, no. 4
• Strony: 361--366
• Opis fizyczny: Bibliogr. 16 poz., il.

Twórcy

autor

Trammer J.

• Institute of Geology, University of Warsaw, Al. Żwirki i Wigury 93; PL-02-089, Poland

Bibliografia

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• ON-LINE REFERENCES
• 14. International Chronostratigraphic Chart (www.stratigraphy.org)
• 15. Paleobiology Database (www.paleodatabase.org)
• 16. Sepkoski’s Online Genus Database constructed by Shanan Peters (www.strata.geology.wisc.edu/jack/)