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Uppermost Cambrian carbon chemostratigraphy: the HERB and undocumented TOCE events are not synonymous

TitleUppermost Cambrian carbon chemostratigraphy: the HERB and undocumented TOCE events are not synonymous
Publication TypeJournal Article
Year of Publication2020
AuthorsLanding, E, Ripperdan, RL, Geyer, G
JournalGeological Magazine
Pagination1 - 5
ISSN0016-7568
Abstract

Chemostratigraphic units require consistent definitions and unambiguous names. So-called TOCE (Top of Cambrian Excursion) is used as an uppermost Cambrian δ13Ccarb negative excursion although it was proposed without documentation, is ambiguously defined, and variably correlated into four Laurentian trilobite zones. TOCE, a nihilartikel, is regularly substituted to the exclusion of the earlier named, precisely documented and geochronologically older HERB (Hellnmaria-Red Tops Boundary) Event. HERB allows late Cambrian global correlation; its onset is close to the lowest occurrence of the conodont Eoconodontus notchpeakensis at the base of a proposed replacement (Lawsonian Stage) of Cambrian Stage 10. TOCE must be retired from use and abandoned as a synonym of the HERB Event.
 

URLhttps://www.cambridge.org/core/product/identifier/S0016756820000382/type/journal_article
DOI10.1017/S0016756820000382
Short TitleGeol. Mag.