|
gptkbp:instanceOf
|
geological formation
|
|
gptkbp:characterizedBy
|
high sea levels
diversification of marine life
first appearance of coral reefs
first land plants
glaciation at end of period
|
|
gptkbp:climate
|
generally warm, cooling at end
|
|
gptkbp:continent
|
gptkb:Siberia
gptkb:Baltica
gptkb:Laurentia
Gondwana dominant
|
|
gptkbp:dividedInto
|
gptkb:Middle_Ordovician
gptkb:Early_Ordovician
gptkb:Late_Ordovician
|
|
gptkbp:duration
|
about 41.6 million years
|
|
gptkbp:endDate
|
443.8 million years ago
|
|
gptkbp:followedBy
|
gptkb:Cambrian
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Ordovician
|
|
gptkbp:lake
|
gptkb:Rheic_Ocean
gptkb:Iapetus_Ocean
gptkb:Paleo-Tethys_Ocean
|
|
gptkbp:namedAfter
|
gptkb:Ordovices
|
|
gptkbp:notableSite
|
brachiopods
conodonts
graptolites
nautiloids
trilobites
early jawless fish
|
|
gptkbp:partOf
|
gptkb:Paleozoic_Era
|
|
gptkbp:precededBy
|
gptkb:Silurian
|
|
gptkbp:recognizedBy
|
gptkb:Charles_Lapworth
1879
|
|
gptkbp:significantEvent
|
gptkb:Great_Ordovician_Biodiversification_Event
gptkb:Ordovician-Silurian_extinction_event
|
|
gptkbp:startDate
|
485.4 million years ago
|
|
gptkbp:type
|
gptkb:Wales
|
|
gptkbp:bfsParent
|
gptkb:Silurian
gptkb:Southern_Uplands
gptkb:Isotelus
|
|
gptkbp:bfsLayer
|
5
|