Statements (32)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
geological formation
|
| gptkbp:climate |
varied from warm to glaciated
|
| gptkbp:contains |
gptkb:Silurian_period
gptkb:Cambrian_period gptkb:Carboniferous_period gptkb:Ordovician_period gptkb:Permian_period gptkb:Devonian_period |
| gptkbp:endDate |
gptkb:Permian-Triassic_extinction_event
about 252 million years ago |
| gptkbp:followedBy |
gptkb:Mesozoic_era
|
| https://www.w3.org/2000/01/rdf-schema#label |
Paleozoic era
|
| gptkbp:majorLifeForms |
amphibians
ferns early reptiles lycophytes brachiopods trilobites |
| gptkbp:notableFor |
gptkb:Cambrian_explosion
appearance of amphibians appearance of reptiles colonization of land by plants development of early fish formation of Pangaea |
| gptkbp:partOf |
gptkb:Phanerozoic_eon
|
| gptkbp:precededBy |
gptkb:Precambrian_supereon
|
| gptkbp:significance |
development of extensive forests
evolution of vertebrates first appearance of hard-shelled animals |
| gptkbp:startDate |
about 541 million years ago
|
| gptkbp:bfsParent |
gptkb:Devonian_period
|
| gptkbp:bfsLayer |
4
|