Silurium
Silurium est systema stratigraphicum et periodus geologica.

Divisio tertia ab infima constituit tam aerae Palaeozoicae quam aeonis Phanerozoicae. Abhinc 4 434 ± 15 centies milium annorum coepit, antecessore Ordovicio. Finem habuit abhinc 4 192 ± 32 centies milium annorum, successore Devonio, secundum scalam aevorum geologicorum Commissionis Internationalis Stratigraphicae. Silurium inceptum ex antiquissimis fossilibus Parakidograpti acuminati et Akidograpti ascensi datur.

In quattuor series dividitur, quae ab infima ad supremam Llandoverium, Wenlockium, Ludlowium, Pridolium appellantur. In octo stadia dividitur, quorum septem Rhuddanium, Aeronium, Telychium, Sheinwoodium, Homerium, Gorstium, Ludfordium appellantur, stadio octavo nullo modo a serie Pridolia differente.

E Siluribus populo antiquo Cambriae appellatur. Nomen Anglicum Silurian system subdivisionesque Ludlow, Wenlock ... and Llandeilo formations, e stratis eiusdem regionis agnitae, primum anno 1835 a Roderico Murchison definitae sunt.

Notae

Bibliographia 
 Jane Gray, W. G. Chaloner, T. S. Westoll, "The Microfossil Record of Early Land Plants: Advances in Understanding of Early Terrestrialization, 1970-1984" in Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences vol. 309 no. 1138 (Evolution and Environment in the Late Silurian and Early Devonian. 2 Aprilis 1985) pp. 167-195
 R. A. Livermore, A. G. Smith, J. C. Briden, "Palaeomagnetic Constraints on the Distribution of Continents in the Late Silurian and Early Devonian" in Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences vol. 309 no. 1138 (Evolution and Environment in the Late Silurian and Early Devonian. 2 Aprilis 1985) pp. 29-56
 Axel Munneke, Mikael Calner, David A. T. Harper, Thomas Servais, "Ordovician and Silurian sea–water chemistry, sea level, and climate: A synopsis" in Palaeogeography Palaeoclimatology Palaeoecology (2010)

 Nexus externi 
 Exempla reliquarum aevi Silurii (Germanice)
 "Silurian" olim apud Palaeos'' divulgatum

Aeva geologica
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Systemata stratigraphica
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