en
2015-08-18 17:58 PM CEST
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/norian:2
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/norian
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/norian:1
Norian (older bound-216.5 +/-2 Ma, younger bound-203.6 +/-1.5 Ma)
IUGS /CGI value