Silurian


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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

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.
References in periodicals archive ?
It includes the Early Silurian Rangeley Formation, a thick, complex assemblage of very coarse to fine clastic rocks interbedded in varying proportions and with varying thicknesses with pelitic strata.
Lower Silurian shales, widely believed to have sourced the huge gas reserves of the Late Permian Khuff in the Persian Gulf, have been examined in Syria.
Only 16 species, commonly represented by single specimens, of Silurian and Devonian scorpions were recognised in 15 genera by Jeram (1998).
Summary: Winstar has successfully drilled its first Silurian exploration well CS Sil #1, to a total depth of 4,390 metres, ahead of budget in terms of both time and costs.
The El Badr-3 and the Cherouq-2 wells, located in the Cherouq Concession, and the Mona-1 well, located in the Anaguid Exploration Permit, were drilled in conjunction with Pioneer's joint venture partner ETAP and tested at a combined initial gross production rate of approximately 10 thousand barrels oil equivalent per day (MBOEPD) from the Silurian sandstone intervals.
Featuring the new Doctor Wh character Vorgenson, the show stars Daleks, Cybermen, Scarecrows, Oods and Silurian.
Alongside the Scarecrows and Vampires will be Judoon, Silurian, Smilers, Winders, Clockwork Robots and Ood to complete a line-up of 11 different creatures.
Others have since observed them in Cambrian-Middle Silurian strata (Reidel 1975; Reidel and Koucky 1981; Reidel and others 1982; Baranoski and others 2003).
KEY WORDS: horseshoe crab trackway, Silurian, Bloomsburg Red Beds, New Jersey
The Ice Age occurred in the Ordovician and Silurian Periods of geological time (part of the Early Palaeozoic Era), an interval that witnessed a major diversification of early marine animals including trilobites and primitive fish as well as the emergence of the first land plants.
Five-disc box set comprising the three Silurian and Sea Devils episodes from the cult series, starring Jon Pertwee and Peter Davison as the crusading timelord.