This work refined reconstruction of the geological framework of the Death Valley area in California that archives the time period in Earth history during which the Snowball Earth glaciations and the evolution of metazoans occurred (between ca. 850 and 600 million years ago). It enhances correlations of the Death Valley sections to those established globally for these time periods and thus enhances understanding of the Neoproterozoic time slice, which records the transition of the Earth System from its Precambrian to its Phanerozoic mode of operation.