ordovician
IPA: ɔrdˈoʊvˈɪʃʌn
Root Word: Ordovician
noun
- (geology) The Ordovician period.
adjective
- (geology) Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.
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Examples of "ordovician" in Sentences
- This also marks the end of the Ordovician period.
- They are used as an index fossil in the Ordovician.
- The conglomerate is estimated to be Ordovician in age.
- Polychaetes diversified in the early Ordovician, about.
- They are from the Ordovician of Morocco and are heavily mined.
- Ordovician dolomite is evident, and two trails lead to a blind.
- Constellaria is an extinct genus of bryozoan from the Ordovician.
- Parasitism of Ordovician bryozoans and the origin of pseudoborings.
- A more pelagic habit was gradually adopted as the Ordovician progressed.
- Bioimmuration is known in the fossil record from the Ordovician to the Recent.
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