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@prefix af: <https://anchorfact.org/ns#> .

<https://anchorfact.org/kb/science/geological-time>
  a schema:Article ;
  schema:headline "Geological Time Scale and Earth History" ;
  schema:url <https://anchorfact.org/science/geological-time/> ;
  af:status "public" ;
  af:confidence "medium" ;
  af:confidenceScore "0.89" ;
  af:confidenceBasis "verified_sources" ;
  af:generationMethod "ai_structured" .

<https://anchorfact.org/kb/science/geological-time>
  schema:citation <https://stratigraphy.org/chart/> ;
  af:sourceTier "S" .

<https://anchorfact.org/kb/science/geological-time>
  schema:citation <https://pubs.usgs.gov/gip/geotime/> ;
  af:sourceTier "A" .

<https://anchorfact.org/kb/science/geological-time>
  schema:citation <https://doi.org/10.1016/0016-7037(56)90036-9> ;
  af:sourceTier "S" .