Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:geological_formation
|
| gptkbp:age |
approximately 66 million years ago
|
| gptkbp:alsoKnownAs |
gptkb:Cretaceous–Paleogene_boundary
|
| gptkbp:associatedWith |
gptkb: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
|
| 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
|
| http://www.w3.org/2000/01/rdf-schema#label |
K-T boundary
|