Examples of 'ordovician period' in a sentence
Meaning of "ordovician period"
The Ordovician period is a geological time period that lasted approximately 485 to 443 million years ago. It is part of the Paleozoic era and characterized by the diversification of marine life, including the emergence of the first jawless fish, early land plants, and the presence of abundant marine invertebrates such as trilobites and brachiopods
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ordovician period
Ordovician period gastropod fossils can be found in the limestones.
It preserves fossils dating back to the Ordovician period.
During the ensuing Ordovician period the seas deepened.
It preserves fossils dating from the Ordovician period.
In the Ordovician period the first fossil fish are found.
These deposits occurred during the Ordovician period.
By the Ordovician period the gastropods were a varied group present in a range of aquatic habitats.
It was followed by the Ordovician period.
By the Ordovician period the gastropods were a varied group present in a few aquatic habitats.
Tetragraptus is an extinct genus of graptolites from the Ordovician period.
This happened at the end of the Ordovician period and in the early Silurian.
Bryozoans have contributed to carbonate sedimentation in marine life since the Ordovician period.
The Ordovician Period is represented by pelitic facies.
This trend would continue into the Ordovician period.
Ordovician Period rocks are found in south, central and northern New Brunswick.
See also
This also marks the end of the Ordovician period.
The first was during the Ordovician period 450 million years ago.
Témiscamingue is a region poor in trilobite with few species and specimen during the Ordovician period.
Their fossil record extends back to the Ordovician period 460 million years ago.
The Devonian invertebrates are essentially of the type established during the Ordovician Period.
They appeared during the Ordovician period.
Until recently, the oldest ciliate fossils known were tintinnids from the Ordovician Period.
Sea urchins appeared at the end of the Ordovician period ( 450 million years ).
Arandaspida is a taxon of very early, jawless prehistoric fish which lived during the Ordovician period.
It preserves fossils from the Late Ordovician period.
A number of regional terms have been used to subdivide the Ordovician Period.
The bedrock forming the cave walls formed during the Ordovician Period.
We are talking about something that might have been equivalent to the Ordovician period on Earth . ”.
Corney is underlain by Grandiorite of the Eskdale intrusion, intruded during the Ordovician period.
A virtual underwater observatory shows the Hudson 's Bay region during the Ordovician period.
The fossils are of primitive fish and date back 450 million years to the Ordovician Period.
These mudstones were deposited in deep seas about 470 million years ago during the Ordovician period.
They first formed roughly 480 million years ago during the Ordovician Period.
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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
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