Quantum redactiones paginae "Devonium" differant
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[[Fasciculus:Devonianscene.jpg|thumb|Prospectus aevi Devoniani restitutus]]
'''Devonium'''<ref>Christof Kuhn, "[http://www.geol-info.at/etyploc.htm Etymology of Geological Time Units]"</ref> (scil. "aevum") est [[systema (stratigraphia)|systema]] [[stratigraphia|stratigraphica]] et [[periodus (geologia)|periodus]] [[Aevum geologicum|geologica]].
{{Aeva geologica}}
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In tres [[series (stratigraphia)|series]] dividitur, quae [[Devonium inferius|inferius]], [[Devonium medium|medium]], [[Devonium superius|superius]] appellantur. In septem [[stadium (stratigraphia)|stadia]] dividitur, quae ab infimo ad supremum [[Lochkovium]], [[Pragium]], [[Emsium]], [[Eifelium]], [[Givetium]], [[Frasnium]], [[Famennium]] appellantur.<ref>"[http://www.stratigraphy.org/ICSchart/ChronostratChart2017-02German.pdf Internationale Chronostratigraphische Tabelle]" (2017)</ref>
E nomine [[Devonia]]e appellatur, regione [[Anglia]]e occidentalis, ubi strata huius periodi primum recognita sunt. Primum anno [[1840]] [[Adam Sedgwick]] et [[Rodericus Murchison]] nomen Anglicum ''Devonian system'' definiverunt e propositione Gulielmi Lonsdale. <ref>"Mr. Austen's communication [was] read December 1837 ... It was immediately after the reading of that paper...that I formed the opinion relative to the limestones of Devonshire being of the age of the old red sandstone; and which I afterwards suggested first to Mr. Murchison and then to Prof. Sedgwick" (p. 724): William Lonsdale, "[https://books.google.com/books?id=QknWzPRnVRQC&pg=PA721#v=onepage&q&f=false Notes on the age of limestones from south Devonshire" in ''Transactions of the Geological Society of London'' 2a ser. vol. 5 (1840) {{Google Books|QknWzPRnVRQC|pp. 721–738}}</ref><ref>"Again, Mr. Lonsdale, after an extensive examination of the fossils of South Devon, had pronounced them, more than a year since, to form a group intermediate between those of the Carboniferous and Silurian systems" (p. 690); "We propose therefore, for the future, to designate these groups collectively by the name Devonian system" (p. 701): Adam Sedgwick, R. I. Murchison, "On the physical structure of Devonshire, and on the subdivisions and geological relations of its older stratified deposits" in ''Transactions of the Geological Society of London'' 2a ser. vol. 5 (1840) {{Google Books|QknWzPRnVRQC|pp. 633–705}}</ref>
== Notae ==
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[[Categoria:Aeva geologica]]
[[Categoria:Palaeozoicum|-]]
[[Categoria:Systemata stratigraphica]]
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