A type of earth material that is a single rock type only
Pyroclastic-rock and pyroclastic-sediment

http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PC_PYSD
Child in main BGS rock hierarchyhttp://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PYRR
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/TPH
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PYBA
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PSPYR
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PYRRH
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/BLBTPH
http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/BBTPH
Child in Total Alkalis Versus Silica hierarchyhttp://data.bgs.ac.uk/id/EarthMaterialClass/RockName/PYRSD
Child in Unconsolidated Deposits hierarchyhttp://www.w3.org/1999/02/22-rdf-syntax-ns#nil
Parent in main BGS rock hierarchyhttp://data.bgs.ac.uk/id/EarthMaterialClass/RockName/+^~VIS
Parent in Total Alkalis Versus Silica hierarchyhttp://www.w3.org/1999/02/22-rdf-syntax-ns#nil
Parent in Unconsolidated Deposits hierarchyhttp://www.w3.org/1999/02/22-rdf-syntax-ns#nil
Schemahttp://data.bgs.ac.uk/ref/EarthMaterialClass/RockName
Label"Pyroclastic-rock and pyroclastic-sediment" language=en 
See alsohttp://dbpedia.org/resource/Pyroclastic_rock
Typehttp://www.w3.org/2004/02/skos/core#Concept
Definition"PYROCLASTIC-ROCK AND PYROCLASTIC-SEDIMENT" language=en 
Is in schemehttp://data.bgs.ac.uk/ref/EarthMaterialClass/RockName
Preferred label"Pyroclastic-rock and pyroclastic-sediment" language=en 

namespaces used
bgsienBGS RCS Named Rock
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