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Silesian (series) : ウィキペディア英語版 | Silesian (series)
The Silesian is in the geologic timescale of Europe a series or epoch, a subdivision of the Carboniferous system or period. It follows or lies on top of the Dinantian epoch/series and lasted from roughly 326.4 to 299.0 Ma ago. The Silesian is subdivided into three stages: (from young to old) Stephanian, Westphalian and Namurian. It was named for Silesia, a region that stretches over the Czech Republic, Poland and Germany. The base of the Silesian is undefined, the top is defined by the first appearance of the conodont ''Streptognathodus isolatus''.
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