Statements (28)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:beganIn |
about 485 million years ago
|
| gptkbp:characterizedBy |
diversification of marine life
first appearance of coral reefs first land plants major glaciation event mass extinction at end |
| gptkbp:contains |
Dapingian stage
Darriwilian stage Floian stage Hirnantian stage Katian stage Sandbian stage Tremadocian stage |
| gptkbp:definedIn |
gptkb:Charles_Lapworth
|
| gptkbp:dividedInto |
gptkb:Middle_Ordovician
gptkb:Early_Ordovician gptkb:Late_Ordovician |
| gptkbp:endDate |
about 444 million years ago
|
| gptkbp:followedBy |
Cambrian system
|
| https://www.w3.org/2000/01/rdf-schema#label |
Ordovician system
|
| gptkbp:location |
gptkb:Wales,_United_Kingdom
|
| gptkbp:namedAfter |
Ordovices (ancient Welsh tribe)
|
| gptkbp:partOf |
gptkb:Paleozoic_era
|
| gptkbp:precededBy |
gptkb:Silurian_system
|
| gptkbp:recognizedBy |
gptkb:International_Commission_on_Stratigraphy
|
| gptkbp:bfsParent |
gptkb:Silurian_system
|
| gptkbp:bfsLayer |
7
|