Devonian
pronunciation
How to pronounce Devonian in British English:
UK [deˈvəuniən]
How to pronounce Devonian in American English:
US [dɪˈvoniən]
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- Noun:
- from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites
Word Origin
- Devonian (adj.)
- 1837, as a geological era, from the English county of Devon, where the Old Red Sandstone formations of that age are prominent, + -ian.
Example
- 1. The end of the devonian was a crucial time for vertebrates .
- 2. Shale beneath the overhanging devonian sandstone has weathered deeper back into the cliff , accounting for the photogenic nature of these falls .
- 3. Heat generated from the farallon plate subducting below the north american plate led to the creation of an island arc of volcanoes on the west coast of proto-north america between the late devonian and permian periods .
- 4. 385 Million b.c. during the middle devonian period of the paleozoic era , a prehistoric fern adds a new growth ring to its trunk , creating the world 's first timeline .