Development of the geologic timescale ontology is continuing under the auspices of GeoSciML. See https://github.com/GeoscienceAustralia/geosciml.org/tree/master/resource/static/ontology/timescale and https://github.com/GeoscienceAustralia/geosciml.org/tree/master/resource/static/vocabulary/timescale
SJDC 2017-07-24