Shanxi Formation Bibliographic references: New coniferophytes ovulate structures from the Early Permian of Chinain which chronostratigraphic unit is the base: Asselianrank: Formation status: regionalin which chronostratigraphic unit is the top: Sakmarian Read more about Shanxi FormationAdd new comment
Asselian Bibliographic references: International Stratigraphic Chartabsolute age of base: 299000kyerror in absolute age of base: 0%Containing Unit: Cisularianrank: Age/Stage status: global Read more about AsselianAdd new comment