BGS Geochronology and Chronostratigraphy concepts published as linked data
IRIs:
http://data.bgs.ac.uk/ref/Geochronology/Division (currently resolving to https://vocab.bgs.ac.uk/v/vocab/gchrnlgy:Division)
and
http://data.bgs.ac.uk/ref/Geochronology/Rank (currently resolving to https://vocab.bgs.ac.uk/v/vocab/gchrnlgy:Rank)
Data available to download through:
https://github.com/BritishGeologicalSurvey/vocabularies/tree/main/vocabularies/Geochronology