@prefix qx8: <http://data.loterre.fr/ark:/67375/QX8> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

qx8:-CW164JM9-R
  skos:prefLabel "Stage 3"@en, "Étage 3"@fr ;
  a skos:Concept ;
  skos:broader qx8:-N67BCN1D-C .

qx8: a skos:ConceptScheme .
qx8:-ZF6TQ5X0-3
  skos:prefLabel "Cambrien"@fr, "Cambrian"@en ;
  a skos:Concept ;
  skos:narrower qx8:-N67BCN1D-C .

qx8:-C8FSRH19-V
  skos:prefLabel "Stage 4"@en, "Étage 4"@fr ;
  a skos:Concept ;
  skos:broader qx8:-N67BCN1D-C .

qx8:-N67BCN1D-C
  skos:exactMatch <https://en.wikipedia.org/wiki/Cambrian_Series_2>, <https://fr.wikipedia.org/wiki/S%C3%A9rie_2> ;
  skos:narrower qx8:-C8FSRH19-V, qx8:-CW164JM9-R ;
  skos:prefLabel "Series 2"@en, "Série 2"@fr ;
  skos:definition "Cambrian Series 2 is the unnamed 2nd series of the Cambrian. It lies above the Terreneuvian series and below the Miaolingian. Series 2 has not been formally defined by the International Commission on Stratigraphy, lacking a precise lower boundary and subdivision into stages. The proposed lower boundary is the first appearance of trilobites which is estimated to be around 521 million years ago. The International Commission on Stratigraphy has not named the 2nd series of the Cambrian yet. In part the new name will replace the older terms \"Lower Cambrian\" and \"Early Cambrian\". The nomenclature used in Siberia uses the term \"Yakutian\" for this series. The 2nd series is currently subdivided by the ICS into two stages: Cambrian Stage 3 and Cambrian Stage 4. Both of these stages also lack formal definition. The Siberian nomenclature distinguishes three stages (lowest first): Atdabanian, Botomian and Toyonian. In general most subdivisions of this series rely on biostratigraphy of trilobite zones. The beginning of the 2nd series of the Cambrian is marked by the appearance of trilobites. The end of the 2nd series of the Cambrian is marked by the first major biotic extinction of the Paleozoic. Changes in ocean chemistry and the marine environment are posited as the most likely cause of these extinctions. (Adapted from: <a href=\"https://en.wikipedia.org/wiki/Cambrian_Series_2\">https://en.wikipedia.org/wiki/Cambrian_Series_2</a>)"@en, "La série 2 est une époque géologique du Cambrien inférieur, entre -521 et -509 millions d'années. Elle correspond approximativement avec le Terreneuvien aux anciennes notions de Géorgien. La division du Cambrien s'est effectué par vote en décembre 2004 de l'ISCS (International Sub-commission on Cambrian Stratigraphy), il demeure le seul système n'ayant pas encore de biostratigraphie complètement établie à l'échelle mondiale à cause du fort endémisme de la faune. La base de la série 2 (521 Ma), et de l'étage 3, est marquée par l'apparition des trilobites, probablement la famille Fallotaspididae. L'étage 4 est marqué par l'apparition du trilobite Olenellus au Laurentia ou des Redlichiidae au Gondwana. (Adapté de : <a href=\"https://fr.wikipedia.org/wiki/S%C3%A9rie_2\">https://fr.wikipedia.org/wiki/S%C3%A9rie_2</a>)"@fr ;
  a skos:Concept ;
  dc:modified "2024-02-28T10:08:04"^^xsd:dateTime ;
  skos:inScheme qx8: ;
  skos:altLabel "2nd series of the Cambrian"@en, "Cambrian Series 2"@en ;
  skos:broader qx8:-ZF6TQ5X0-3 .