Statements (14)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:endDate |
445.2 million years ago
|
| gptkbp:followedBy |
gptkb:Hirnantian_Stage
|
| gptkbp:GSSPDefinedBy |
First appearance of the graptolite Diplacanthograptus caudatus
|
| https://www.w3.org/2000/01/rdf-schema#label |
Katian Stage
|
| 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
|