279 241
recensiones
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[[Fasciculus:Gotland-reef_hg.jpg|thumb|right|300 px|Insula Gotland: saxa Silurica]]
'''Silurium'''<ref>"Silurium": Robertus Koeppel, ''Praelectiones geologiae et praehistoriae'' pars 1 iii (Romae, 1933) p. 5 {{Google Books|zDbEpQ0QkUMC|Paginae selectae}}</ref><ref>Christof Kuhn, "[http://www.geol-info.at/etyploc.htm Etymology of Geological Time Units]"</ref>
{{Aeva geologica}}
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