Examples of 'ordovician' in a sentence
Meaning of "ordovician"
Ordovician is an adjective referring to the second period of the Paleozoic era, known for its diverse marine life
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- Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.
- The Ordovician period.
How to use "ordovician" in a sentence
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ordovician
Ordovician period gastropod fossils can be found in the limestones.
The bedrock is mostly limestone of Ordovician origin.
Ordovician fossils can be found amidst the layers of rock.
Their jaws are known from Ordovician sediments.
Ordovician extinction event.
They are used as an index fossil in the Ordovician.
Ordovician sedimentary rock.
The arthropods of the Ordovician pioneered the most.
The Ordovician is represented by a calcareous slate.
The protected area lies on an Ordovician limestone plateau.
But while the ordovician extinction was fatal to most species some grasped at the opportunity.
It preserves fossils dating back to the Ordovician period.
Therefore an Ordovician age of the arkose is most likely.
It is a bare hill of the Ordovician limestone.
In the Ordovician period the first fossil fish are found.
See also
It preserves fossils dating from the Ordovician period.
During the ensuing Ordovician period the seas deepened.
These deposits occurred during the Ordovician period.
Life in the Ordovician continued to be dominated by marine animals and vegetation.
Several groups of endobiotic symbionts appeared in the Ordovician.
It occurs from the early Ordovician until the present.
Its sedimentation lasted probably into the lowermost Ordovician.
An Ordovician strophomenid brachiopod with encrusting inarticulate brachiopods and a bryozoan.
It was followed by the Ordovician period.
The Ordovician was the first mass extinction but hardly the worst.
That seems to have happened in the Ordovician mass extinctions.
Cothurnocystis is a genus of small enigmatic echinoderms that lived during the Ordovician.
The stratigraphic gap of the intervening Ordovician suggests otherwise.
By the Ordovician period the gastropods were a varied group present in a range of aquatic habitats.
Tetragraptus is an extinct genus of graptolites from the Ordovician period.
The subsurface is composed of Ordovician sandstone and shale with red hematite.
Tennessee was covered by shallow seas during the Ordovician.
This happened at the end of the Ordovician period and in the early Silurian.
The answer is that the concretion itself is not Ordovician.
Paleogene red beds and Ordovician sediments form the basement of the caldera.
This trend would continue into the Ordovician period.
This Ordovician rock is composed of laminated mudstone and siltstone with greywacke sandstone.
This also marks the end of the Ordovician period.
By the Ordovician period the gastropods were a varied group present in a few aquatic habitats.
Another mass extinction marked the end of the Ordovician.
During the Ordovician the southern continents were collected into a single continent called Gondwana.
These groups continued to inhabit this sea into the Ordovician.
Fossil collectors tend to look out for the Ordovician shales wedged in between the cliffs.
They did not become prominent in the fossil record until the Ordovician.
The arthropods of the Ordovician pioneered the most successful body plan ever evolved by life.
Fossil spores from land plants have been identified in uppermost Ordovician sediments.
The Early Ordovician in general was a time of transgression.
Proetida is an order of trilobite that lived from the Ordovician to the Permian.
Four Ordovician units are well represented.
Bryozoans have contributed to carbonate sedimentation in marine life since the Ordovician period.
