Silurian


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Silurian: Devonian

Silurian

1. of, denoting, or formed in the third period of the Palaeozoic era, between the Ordovician and Devonian periods, which lasted for 25 million years, during which fishes first appeared
2. of or relating to the Silures
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Silurian

[si′lu̇r·ē·ən]
(geology)
A period of geologic time of the Paleozoic era, covering a time span of between 430-440 and 395 million years ago.
The rock system of this period.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Open-hole log data (including an MDT - Modular Formation Dynamic Tester) and well-site geological measurements and observations indicate hydrocarbon potential in the Silurian Tannezuft and Acacus sandstones, Devonian Ouan Kasa sandstones and the Triassic TAGI sandstones.EeEe
Ancestral horseshoe crabs (Class Merostomata, Order Xiphosurida, Suborder Synziphosurina), often found associated with eurypterids in Silurian and Devonian strata, are sporadically represented in the geologic column (Stormer, 1955).
This analysis of biofacies is compared to other Early Silurian associations, especially in Scandinavia and Great Britain.
Silurian and Devonian rocks in Indiana southwest of the Cincinnati Arch.
The Devonian System is represented by the Mackinac Breccia, which is composed of fragmented shale, limestone, and dolomite from formations of the Upper Silurian and Lower Devonian.
The Fusselman Formation consists of two major lithostratigraphic units, a thin basal, Late Ordovician (Hirnantian) oolite that is overlain unconformably by a thicker Llandoverian (Silurian) complex of carbonates.
Dimitri Kaljo's scientific focus has been on Ordovician and Silurian fossils, stratigraphy, palaeogeography, and more recently, geochemistry.
This paper focuses on a relatively quiet interval from Late Ordovician (Ashgill) to Late Silurian times when an enormous volume of sediment eroded from post-Middle Ordovician highlands was deposited in extensive basins on the Ganderian composite plate.
[USA], Sept 1 (ANI): Around 420 million years back in the pre-historic Silurian Period, Earth suffered a major mass extinction, which wiped out almost 23 per cent of the marine life.