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Definition of Silurian period
1. Noun. From 425 million to 405 million years ago; first air-breathing animals.
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period
Lexicographical Neighbors of Silurian Period
Literary usage of Silurian period
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Ancient Life-history of the Earth: A Comprehensive Outline of the by Henry Alleyne Nicholson (1897)
"CHAPTER X. THE UPPER Silurian period. Having now treated of the Lower Silurian
period at considerable length, it will not be necessary to discuss the ..."
2. The Ancient Life-history of the Earth: A Comprehensive Outline of the by Henry Alleyne Nicholson (1897)
"Having now treated of the Lower Silurian period at considerable length, it will
not be necessary to discuss the succeeding group of the Upper Silurian in ..."
3. The Ancient Life-history of the Earth: A Comprehensive Outline of the by Henry Alleyne Nicholson (1898)
"Having now treated of the Lower Silurian period at considerable length, it will
not be necessary to discuss the succeeding group of the Upper Silurian in ..."
4. The Ancient Life-history of the Earth: A Comprehensive Outline of the by Henry Alleyne Nicholson (1877)
"Having now treated of the Lower Silurian period at considerable length, it will
not be necessary to discuss the succeeding group of the Upper Silurian in ..."
5. The Ancient Life-history of the Earth: A Comprehensive Outline of the by Henry Alleyne Nicholson (1895)
"Having now treated of the Lower Silurian period at considerable length, it will
not be necessary to discuss the succeeding group of the Upper Silurian in ..."
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