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Silurian

Syllabification: Si·lu·ri·an
Pronunciation: /səˈlo͝orēən, sīˈlo͝orēən/

Definition of Silurian in English:

adjective

Geology
1Of, relating to, or denoting the third period of the Paleozoic era, between the Ordovician and Devonian periods.
Example sentences
  • Conventionally, the Cambrian, Ordovician, and Silurian systems constitute the Lower Palaeozoic and the Devonian, Carboniferous, and Permian comprise the Upper Palaeozoic.
  • These are overlain by low-grade metamorphosed sediments and volcanics of Ordovician and Silurian age.
  • The so-called ophiolitic relics at the Moldanubian-Brunovistulian boundary show Early Ordovician to Silurian crystallization ages.
1.1 (as noun the Silurian) The Silurian period or the system of rocks deposited during it.

The Silurian lasted from about 439 million to 409 million years ago. The first true fish and land plants appeared during the period, and the end of the period is marked by the climax of the Caledonian orogeny

Origin

early 18th century: from Latin Silures (denoting a people of ancient southeastern Wales) + -ian.

Definition of Silurian in:

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