Tertiary 3 : Geologic period from 65 million to 2.6 million years ago. This time period began with the extinction of the non-avian dinosaurs and signifies the end of the Cretaceous Period and the start of the Cenozoic era
U.S. Geological Survey, U.S. Department of the Interior, Volcano Hazards Program, Glossary, Washington, DC, USA 2011. http://volcanoes.usgs.gov/vsc/glossary/alluvium.ht ml, (ND/ Volc Emr - Amer) {795}