At the 77th Annual Meeting of the North American Commission on Stratigraphic Nomenclature (NACSN), 10 October 2022, Denver, Colorado, the Commission voted to accept the introduction of Chemostratigraphic Units to the North American Stratigraphic Code (NACSN 2021) and revisions to the OVERVIEW section and Articles 2, 61 and 62, the renumbering of Articles 61-97 as Articles 63-99, minor rewording of Articles 68 and 77, and concomitant changes to Tables 1 and 2 and Text-Figure 1. Specific revisions of the Code are indicated in red text. These changes replace all older versions of the specified Articles. An application for this revision (Scott et al. 2020) was published in Stratigraphy more than one year prior to the meeting; thus, the vote on this application for revision follows Article 21 of the Code. The numbering of the Articles here differs from that proposed in Scott et al. (2020) hence new versions of Tables 1 and 2 and Text-Figure 1 are introduced here. These revisions explicitly allow the use of chemostratigraphic Units in formal stratigraphic nomenclature.
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