Statements (14)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:beganIn |
458.4 million years ago
|
| gptkbp:endDate |
453.0 million years ago
|
| gptkbp:followedBy |
gptkb:Darriwilian_Stage
|
| https://www.w3.org/2000/01/rdf-schema#label |
Sandbian Stage
|
| gptkbp:lowerBoundaryDefinedBy |
First appearance of graptolite Nemagraptus gracilis
|
| gptkbp:namedAfter |
gptkb:Södra_Sandby
|
| gptkbp:partOf |
gptkb:Ordovician_Period
|
| gptkbp:precededBy |
gptkb:Katian_Stage
|
| gptkbp:ratifiedBy |
gptkb:International_Commission_on_Stratigraphy
|
| gptkbp:stratigraphicUnitOf |
gptkb:Upper_Ordovician
|
| gptkbp:upperBoundaryDefinedBy |
First appearance of graptolite Diplacanthograptus caudatus
|
| gptkbp:bfsParent |
gptkb:Ordovician_System
|
| gptkbp:bfsLayer |
7
|