By Stanley C. Finney and Lucy E. Edwards | GSA Today  We thank Jan Zalasiewicz and his 25 co-authors for their consid- ered response. We are in complete agreement with the following two major statements: “All chronostratigraphic units are defined by their base and char- acterized by their content;” and “There are clearly societal and political … Continue reading REPLY: Zalasiewicz et al. Comment