Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:beganIn |
about 485.4 million years ago
|
| gptkbp:characterizedBy |
first appearance of coral reefs
diverse marine invertebrates major diversification of life |
| gptkbp:contains |
gptkb:Dapingian_Stage
gptkb:Darriwilian_Stage gptkb:Floian_Stage gptkb:Hirnantian_Stage gptkb:Katian_Stage gptkb:Sandbian_Stage gptkb:Tremadocian_Stage |
| gptkbp:definedIn |
gptkb:Charles_Lapworth
|
| gptkbp:duration |
about 41.6 million years
|
| gptkbp:endDate |
gptkb:Ordovician-Silurian_extinction_event
about 443.8 million years ago |
| gptkbp:followedBy |
gptkb:Cambrian_System
|
| https://www.w3.org/2000/01/rdf-schema#label |
Ordovician System
|
| gptkbp:namedAfter |
Ordovices (ancient Welsh tribe)
|
| gptkbp:partOf |
gptkb:Paleozoic_Era
|
| gptkbp:precededBy |
gptkb:Silurian_System
|
| gptkbp:recognizedBy |
gptkb:International_Commission_on_Stratigraphy
|
| gptkbp:typeLocation |
gptkb:Wales,_United_Kingdom
|
| gptkbp:bfsParent |
gptkb:Silurian_System
gptkb:Illinois_Basin gptkb:Cincinnatian |
| gptkbp:bfsLayer |
6
|