@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix mi: <https://taxonomy.materialinstruments.com/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://taxonomy.materialinstruments.com/id/material/clay>
  a skos:Concept ;
  skos:inScheme <https://taxonomy.materialinstruments.com/id/axis/material> ;
  skos:prefLabel "Clay"@en ;
  skos:definition "A naturally occurring fine-grained earthy material composed largely of clay minerals, unfired."@en ;
  skos:broader <https://taxonomy.materialinstruments.com/id/material/mineral> ;
  skos:closeMatch <http://www.wikidata.org/entity/Q42302> ;
  skos:notation "Ma_20_16"^^<https://taxonomy.materialinstruments.com/ns/uniclass> ;
  mi:sourceBasis "referenced" ;
  dcterms:source "https://pubs.usgs.gov/info/clays/" ;
  dcterms:date "2026-08-30" ;
  mi:status "active" .