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.

中文翻译：

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寒武纪最上层碳化学地层学：HERB 和未记录的 TOCE 事件不是同义词

化学地层单位需要一致的定义和明确的名称。所谓的 TOCE (Top of Cambrian Excursion) 被用作最上面的寒武纪δ13C碳水化合物负偏移虽然是在没有文件的情况下提出的，但定义不明确，并且可变地关联到四个劳伦三叶虫区。TOCE 是一个 nihilartikel，经常被替换，以排除更早命名、精确记录和年代较早的 HERB（Hellnmaria-Red Tops Boundary）事件。HERB允许晚寒武世全球相关；它的发病率接近牙形石的最低出现次数鲶鱼在寒武纪第 10 阶段的拟议替代（劳森阶段）的基础上。TOCE 必须停止使用并作为 HERB 事件的同义词被放弃。