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gptkbp:instance_of
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gptkb:geological_formation
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gptkbp:bfsLayer
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4
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gptkbp:bfsParent
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gptkb:Phanerozoic_Eon
gptkb:Paleozoic_Era
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gptkbp:climate
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generally warm and stable
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gptkbp:duration
|
approximately 23 million years
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gptkbp:ends_at
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419.2 million years ago
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gptkbp:follows
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Ordovician Period
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gptkbp:fossil_record
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gptkb:galaxy
gptkb:dinosaur
gptkb:Insects
gptkb:Cnidarians
gptkb:superhero
gptkb:Anomalocaridids
gptkb:Brachiopods
gptkb:Chordates
gptkb:Conodonts
gptkb:Cystiphyllum
gptkb:Drepanocladus
gptkb:Foraminifera
gptkb:Hybodus
gptkb:Pentamerus
gptkb:Polychaetes
gptkb:Pterobranchs
gptkb:Strophomena
gptkb:Ammonites
gptkb:Eurypterids
gptkb:Graptolites
gptkb:Scorpions
Mollusks
Bivalves
Echinoderms
Gastropods
Sponges
Bryozoans
Ctenophorans
Flickia
Pseudocorax
Clymenia
Acanthodian fish
Hexapods
Lobopods
Myriapods
Nautiloids
Ostracods
Palaeosoma
Rugose corals
Tabulate corals
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|
gptkbp:geographical_feature
|
extensive shallow seas
reef-building organisms
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|
https://www.w3.org/2000/01/rdf-schema#label
|
Silurian Period
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gptkbp:is_characterized_by
|
diversification of fish
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gptkbp:launched
|
443.8 million years ago
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gptkbp:lifespan
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gptkb:island
gptkb:opera
gptkb:fish
early vascular plants
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gptkbp:notable_event
|
first land plants appear
first terrestrial arthropods appear
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gptkbp:precedes
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Devonian Period
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