BGS Lexicon of Named Rock Units
has rock unit rank

http://data.bgs.ac.uk/ref/Lexicon/hasRockUnitRank
Comment"Property links to the rank of the rock unit" language=en 
Label"has rock unit rank" language=en 
Rangehttp://data.bgs.ac.uk/ref/Lexicon/RockUnitRank
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