en
2015-08-18 18:00 PM CEST
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/hirnantian:2
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/hirnantian
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/hirnantian:1
Hirnantian (older bound-445.6 +/-1.5 Ma, younger bound-443.7 +/-1.5 Ma)
IUGS /CGI value