Geologic Names and Usage: A Guide to Stratigraphic Nomenclature

Stratigraphic nomenclature is the system of proper names given to specific stratigraphic units, which provides a universal language essential for all scientific publications. Consistent and effective communication in the geosciences requires systematic use of stratigraphic nomenclature. This review of geologic names usage and stratigraphic principles serves as a foundation for professionals and students to improve geoscience communication among all industries.

The importance of consistent stratigraphic nomenclature as a means of effective geologic communication has been recognized since the USGS established the Geologic Names Committee (GNC) in 1899 to evaluate and address issues of nomenclature. A geologic names review is more than spell checking geologic names and correcting usage of rank and rank terms. It also includes making sure publications are in conformance with the North American Stratigraphic Code or the International Stratigraphic Guide. It is essential to make sure there is stratigraphic consistency between text, correlation charts, descriptions of stratigraphic units, figures, and tables within papers and geologic maps, as this is a prerequisite for clear explanations, and precise discussion of data and interpretations.