Devonian

[De*vo·ni*an]

From 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites

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Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.

Noun
from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites

a.
Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.

n.
The Devonian age or formation.

Devonian

De*vo"ni*an , a. (Geol.) Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system. Devonian age (Geol.), the age next older than the Carboniferous and later than the Silurian; -- called also the Age of fishes. The various strata of this age compose the Devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology.

Devonian

De*vo"ni*an, n. The Devonian age or formation.

Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.

The Devonian age or formation.

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