@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .

<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
nalt:15964_def
  a <https://lod.nal.usda.gov/naltv#Definition> ;
  rdf:value "Rocas formadas por la solidificación de materiales fundidos que han sido comprimidos sobre la superficie del suelo."@es, "Volcanic rocks are formed by solidification of molten materials which have been extruded onto the ground surface."@en ;
  dc:source "NAL Thesaurus Staff" .

<https://lod.nal.usda.gov/nalt>
  a skos:ConceptScheme ;
  rdfs:label "NALT Full"@en .

<https://lod.nal.usda.gov/naltv#Topic>
  a owl:Class ;
  rdfs:label "Topic"@en .

nalt:15964
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Topic> ;
  dc:created "2006-01-19"^^xsd:date ;
  dc:modified "2016-10-25"^^xsd:date ;
  skos:altLabel "lava rocks"@en ;
  skos:broader nalt:60653, nalt:43654 ;
  skos:definition nalt:15964_def ;
  skos:inScheme <https://lod.nal.usda.gov/nalt>, <https://lod.nal.usda.gov/nalt-core> ;
  skos:narrower nalt:15963, nalt:66575, nalt:57483, nalt:60563, nalt:210677 ;
  skos:prefLabel "rocas volcánicas"@es, "volcanic rocks"@en ;
  skos:related nalt:49173 ;
  ns0:marc001 "39707" .

nalt:210677
  a ns0:Topic, skos:Concept ;
  skos:broader nalt:15964 ;
  skos:prefLabel "andesita"@es, "andesite"@en .

nalt:60563
  a ns0:Topic, skos:Concept ;
  skos:broader nalt:15964 ;
  skos:prefLabel "piedra pómez"@es, "pumice"@en .

nalt:57483
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:15964 ;
  skos:prefLabel "perlita"@es, "perlite"@en .

nalt:66575
  a ns0:Topic, skos:Concept ;
  skos:broader nalt:15964 ;
  skos:prefLabel "toba"@es, "tuff"@en .

nalt:15963
  a ns0:Topic, skos:Concept ;
  skos:broader nalt:15964 ;
  skos:prefLabel "basalto"@es, "basalt"@en .

nalt:43654
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:15964 ;
  skos:prefLabel "rocas ígneas"@es, "igneous rocks"@en .

nalt:60653
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:15964 ;
  skos:prefLabel "materiales pirclásticos"@es, "pyroclastic materials"@en .

nalt:49173
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "volcanes"@es, "volcanoes"@en ;
  skos:related nalt:15964 .