Statements (23)
Predicate | Object |
---|---|
gptkbp:instanceOf |
geological formation
|
gptkbp:age |
approximately 66 million years ago
|
gptkbp:alsoKnownAs |
gptkb:Cretaceous–Paleogene_boundary
|
gptkbp:associatedWith |
mass extinction event
dinosaur extinction |
gptkbp:characterizedBy |
high iridium concentration
|
gptkbp:contains |
iridium layer
|
gptkbp:discoveredBy |
gptkb:Luis_Alvarez
gptkb:Walter_Alvarez |
gptkbp:discoveredIn |
1980
|
gptkbp:evidence |
gptkb:Chicxulub_impact
|
gptkbp:foundIn |
sedimentary rock layers worldwide
|
https://www.w3.org/2000/01/rdf-schema#label |
K-T boundary
|
gptkbp:marking |
beginning of the Paleogene period
end of the Cretaceous period |
gptkbp:notablePlace |
gptkb:Gubbio,_Italy
gptkb:Stevns_Klint,_Denmark gptkb:Hell_Creek_Formation,_USA |
gptkbp:separates |
Mesozoic Era and Cenozoic Era
|
gptkbp:usedIn |
paleontology
stratigraphy |
gptkbp:bfsParent |
gptkb:K-T_extinction_event
|
gptkbp:bfsLayer |
8
|