ratified by IUGS (15-12-2019) Stratotype Point Base of Hauterivian https://stratigraphy.org/icschart/ChangeLog2012-2013-2014-2015-2016-2017-2018-2019-2020.txt base of Bed 189 of La Charce Section. Ammonite FAD of genus Acanthodiscus (especially A. radiatus) Stratotype Point Base of Hauterivian Base of Hauterivian true La Charce village, DrĂ´me Province, southeast France