Silurian period


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Silurian period

The third period of the Paleozoic era: 438 to 408 million years ago.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Silurian period - from 425 million to 405 million years agoSilurian period - from 425 million to 405 million years ago; first air-breathing animals
Paleozoic, Paleozoic era - from 544 million to about 230 million years ago
References in classic literature ?
Then by degrees, in the silurian period, the tops of the mountains began to appear, the islands emerged, then disappeared in partial deluges, reappeared, became settled, formed continents, till at length the earth became geographically arranged, as we see in the present day.
In 1844, Reverend William Branwhite Clarke, a pastor and geologist, visited Duntroon and discovered fossils from the Silurian Period at the nearby Woolshed Creek.
Qilinyu rostrate was an armored bottom-dwelling fish that lived in the Silurian period, from about 444 million years ago to about 419 million years ago.
The Silurian Period was characterized by calcite seas (Stanley 2006), and hardgrounds were common, though probably less abundant than in the Ordovician (Taylor & Wilson 2003).
model the a large with a like you stairs WREN'S NEST NATIONAL NATURE RESERVE Wrens Hill Road, Dudley, DY1 3SB A disused Victorian quarry which has been turned into a nature reserve and is world-famous for its fossils from the Silurian period - long before dinosaurs existed but no less fascinating.
It wasn't until sometime around 440 million years ago, near the beginning of the Silurian Period, that the record yields tantalizing but rare and fragmentary evidence that jaw-bearing fishes had evolved.
The age of the marine sapropelic originating from algae in the Silurian period.