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Correlation of the Cambrian Evolutionary Radiation: geochronology, evolutionary stasis of earliest Cambrian (Terreneuvian) small shelly fossil (SSF) taxa, and chronostratigraphic significance

TitleCorrelation of the Cambrian Evolutionary Radiation: geochronology, evolutionary stasis of earliest Cambrian (Terreneuvian) small shelly fossil (SSF) taxa, and chronostratigraphic significance
Publication TypeJournal Article
Year of Publication2016
AuthorsLanding, E, Kouchinsky, A
JournalGeological Magazine
Volume153
Issue4
Pagination750-756
Date Published02/2016
ISSN0016-7568
KeywordsCambrian Evolutionary Radiation, Meishucunian, Siberia, Terreneuvian, Tommotian
Abstract

Early faunas with Watsonella crosbyi with or without Aldanella spp. have been equated with the Siberian Tommotian Stage (uppermost Terreneuvian) and used to define a proposed Cambrian Stage 2 base. Much earlier Terreneuvian occurrences are now shown by recovery of these micromolluscs below the I’ carbon excursion in the Siberian ‘Nemakit-Daldynian’ Stage and comparable δ13C excursions in the middle Meishucunian (China) and middle Chapel Island Formation (Avalonia). This δ13C excursion, a reliable Stage 2 marker, lies in a c. 10 Ma interval in the Cambrian Radiation in which long-ranged small shelly fossil taxa provide limited biostratigraphic resolution.

URLhttp://www.journals.cambridge.org/abstract_S0016756815001089
DOI10.1017/S0016756815001089
Short TitleGeol. Mag.