Revision of the 'Biostratigraphic units' section of the North American Stratigraphic Code

摘要

The current version North American Strati-graphic Code was published in 1983, and since then, a single amendment has been proposed and accepted—that regarding allo-stratigraphic units (Baars, 1994). The section on biostratigraphic units has remained unchanged. A decade after the Code was published, the second edition of the International Stratigraphic Guide (Salvador, 1994) appeared, and this, coupled with ongoing discussions of the North American Commission on Stratigraphic Nomenclature (NACSN), has prompted a comparison between the two publications. We are of the opinion that there is a pressing need for a revision of the Biostratigraphic Units section. The content of the revision could be comparable to that of the International Guide or, simplified in a more radical way.