BGS Geochronostratigraphy
maximum age

http://data.bgs.ac.uk/ref/Geochronology/start
Comment"A property linking to the earliest date (ie maximum age) of a geological time division" language=en 
Label"maximum age" language=en 
Rangehttp://data.bgs.ac.uk/ref/Geochronology/Boundary
Typehttp://www.w3.org/1999/02/22-rdf-syntax-ns#Property

namespaces used
bgsrBGS Schemas
bgsreBGS RCS Earth Material Classes
bgsrgBGS Geochronology
bgsrlBGS Lexicon of Named Rock Units
bgsrmBGS 1:625 000 Digital Geological Map
dctDublin Core terms
rdfResource Description Framework
rdfsResource Description Framework - Schema
skosSimple Knowledge Organization System
xsdXML Schema Data Type