Statements (55)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:geographical_feature
|
| gptkbp:associated_with |
Ordovician radiation
|
| gptkbp:climate |
warm and shallow seas
|
| gptkbp:field_of_study |
geology
paleontology stratigraphy |
| gptkbp:first_appearance |
485 million years ago
|
| gptkbp:follows |
Cambrian period
|
| gptkbp:fossil_record |
gptkb:dinosaur
gptkb:opera gptkb:graptolites |
| gptkbp:geological_formation |
Arenig Formation
Tremadoc Formation |
| https://www.w3.org/2000/01/rdf-schema#label |
Tremadocian stage
|
| gptkbp:is_characterized_by |
gptkb:dinosaur
|
| gptkbp:notable_event |
extinction events
development of coral reefs changes in community structure formation of new habitats climatic shifts increased sedimentation rates changes in ocean chemistry development of new ecological niches evolution of new species biogeographic changes changes in faunal assemblages changes in sediment composition development of benthic communities development of new feeding strategies development of new reproductive strategies development of symbiotic relationships diversification of echinoderms evolution of early fish expansion of marine habitats first appearance of many marine species formation of carbonate platforms formation of new sedimentary basins increased nutrient availability influence of anthropogenic factors influence of biotic interactions influence of climate on biodiversity influence of environmental changes influence of ocean currents influence of predation pressures influence of sea level changes influence of tectonic activity influence of volcanic activity |
| gptkbp:part_of |
Ordovician period
|
| gptkbp:precedes |
Arenigian stage
|
| gptkbp:region |
global
|
| gptkbp:significance |
early Ordovician biodiversity
|
| gptkbp:type |
marine sedimentary rocks
|
| gptkbp:works_for |
477 million years ago
|
| gptkbp:bfsParent |
gptkb:Upper_Cambrian
|
| gptkbp:bfsLayer |
6
|