@prefix envthes: . @prefix skos: . @prefix owl: . @prefix dc: . @prefix xsd: . envthes: skos:prefLabel "EnvThes"@en ; a owl:Ontology, skos:ConceptScheme . envthes:21024 skos:inScheme envthes: ; a skos:Concept ; skos:scopeNote "MS Academic Keyword"@en ; skos:definition "[Henderson's] any of the various epi­sodes in evolutionary history in which numerous large groups of organisms dis­appear from the fossil record over a rel­atively short time (e.g. the extinction of the dinosaurs and other groups at the end of the Cretaceous). Mass extinctions are generally explained by sudden changes in climate, of various causes."@en ; skos:broader envthes:20982 ; dc:modified "2019-02-17"^^xsd:date ; dc:created "2016-10-12"^^xsd:date ; skos:prefLabel "mass extinction"@en ; dc:creator "0000-0003-2195-3997"@en . envthes:20982 skos:prefLabel "biological process"@en ; a skos:Concept ; skos:narrower envthes:21024 .