en
2015-08-18 17:59 PM CEST
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/pragian:2
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/pragian
http://inspire.ec.europa.eu/codelist/GeochronologicEraValue/pragian:1
Pragian (older bound-411.2 +/-2.8 Ma, younger bound-407 +/-2.8 Ma)
IUGS /CGI value