Statements (14)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:geological_formation | 
| gptkbp:endDate | 445.2 million years ago | 
| gptkbp:followedBy | gptkb:Hirnantian_Stage | 
| gptkbp:GSSPDefinedBy | First appearance of the graptolite Diplacanthograptus caudatus | 
| gptkbp:location | Black Knob Ridge, Oklahoma, USA | 
| gptkbp:namedAfter | Katy Lake, Oklahoma, USA | 
| gptkbp:partOf | gptkb:Upper_Ordovician | 
| gptkbp:precededBy | gptkb:Sandbian_Stage | 
| gptkbp:ratifiedBy | gptkb:International_Commission_on_Stratigraphy 2006 | 
| gptkbp:startDate | 453 million years ago | 
| gptkbp:bfsParent | gptkb:Ordovician_System | 
| gptkbp:bfsLayer | 7 | 
| https://www.w3.org/2000/01/rdf-schema#label | Katian Stage |