Statements (20)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:beganIn |
445.2 million years ago
|
| gptkbp:contains |
gptkb:Late_Ordovician_mass_extinction
gptkb:Hirnantian_glaciation |
| gptkbp:definedIn |
first appearance of the graptolite Normalograptus extraordinarius
|
| gptkbp:duration |
1.4 million years
|
| gptkbp:endDate |
443.8 million years ago
|
| gptkbp:followedBy |
gptkb:Katian_Stage
Rhuddanian Stage |
| gptkbp:GSSPYear |
2006
|
| https://www.w3.org/2000/01/rdf-schema#label |
Hirnantian Stage
|
| gptkbp:location |
Wufeng Formation, China
|
| gptkbp:namedAfter |
gptkb:Hirnant,_Wales
|
| gptkbp:partOf |
gptkb:Upper_Ordovician
|
| gptkbp:precededBy |
gptkb:Katian_Stage
Rhuddanian Stage |
| gptkbp:stratigraphicUnitOf |
gptkb:Ordovician_System
|
| gptkbp:bfsParent |
gptkb:Ordovician_System
gptkb:Llandovery_Series |
| gptkbp:bfsLayer |
7
|