In the geologic timescale, the Asselian is the earliest geochronologic age or lowermost chronostratigraphic stage of the Permian. It is a subdivision of the Cisuralian epoch or series. The Asselian lasted between {Geologic Ages Inline|Asselian} and {Geologic Ages Inline|Sakmarian} million years ago (Ma). It was preceded by the Gzhelian (the latest...
Found on
http://en.wikipedia.org/wiki/Asselian
The lowest stage of the permian, 290.0 - 281.5 Ma
Found on
https://www.encyclo.co.uk/local/20501
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