Cenozoic 3 : An era of geologic time from the beginning of the Tertiary period, spanning the time between 65 million years ago to the present. The Cenozoic contains the Tertiary and the Quaternary periods. (GSA 1999 Geologic Timescale)
U.S. Department of the Interior, U.S. Geological Survey, US Geological Society (USGS), Glossary of Volcano and Related Terminology, USGS/Cascades Volcano Observatory, Vancouver, Washington, USA 2006. http://vulcan.wr.usgs.gov/Glossary/volcano_termino logy.html, (ND/ Volc Sci - Amer) {493}