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gptkbp:instanceOf
|
geological formation
|
|
gptkbp:climate
|
warm at start, cooling towards end
|
|
gptkbp:duration
|
about 41.6 million years
|
|
gptkbp:endDate
|
443.8 million years ago
|
|
gptkbp:extinct
|
gptkb:Ordovician-Silurian_extinction_event
|
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gptkbp:followedBy
|
gptkb:Silurian_period
|
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gptkbp:fossil
|
abundant marine fossils
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Ordovician period
|
|
gptkbp:marineLife
|
brachiopods
conodonts
crinoids
graptolites
nautiloids
trilobites
|
|
gptkbp:namedAfter
|
Ordovices (ancient Celtic tribe)
|
|
gptkbp:namedFor
|
gptkb:Charles_Lapworth
|
|
gptkbp:notableFor
|
gptkb:Ordovician-Silurian_extinction_event
diversification of marine life
first appearance of coral reefs
first land plants
major glaciation event
|
|
gptkbp:partOf
|
gptkb:Paleozoic_era
|
|
gptkbp:precededBy
|
gptkb:Cambrian_period
|
|
gptkbp:significantEvent
|
gptkb:Great_Ordovician_Biodiversification_Event
|
|
gptkbp:startDate
|
485.4 million years ago
|
|
gptkbp:stratotypeLocation
|
gptkb:Wales,_United_Kingdom
|
|
gptkbp:supercontinent
|
gptkb:Siberia
gptkb:Baltica
gptkb:Gondwana
gptkb:Laurentia
|
|
gptkbp:bfsParent
|
gptkb:lake
|
|
gptkbp:bfsLayer
|
4
|