Vol 2, (1974)
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- Category: Vol 2, (1974)
Authors: Václav Havlena
Full version (2,898 kB)Abstract: The age of the Central Bohemian Nýřany Member and later Carboniferous formations is discussed following the newly published time-ranges of the Spanish, French and German Stephanian floral species. The Westphalian-Stephanian boundary should be drawn within the youngest strata of the Nýřany Member. The Cantabrian Stage is recognized as a valid stage. In the Central Bohemian Basin, however, both the Cantabrian and Stephanian A stages are not to be distinguished. The flora of the Upper Grey Formation is correlated with the Middle and Upper Stephanian B flora of the Decazeville Basin. The position of the Stephanian B – Stephanian C boundary within the Central Bohemian strata cannot be pointed out at present. The proposal of A. Bouroz and R. H. Wagner to recognize the Cantabrian Stage as the lowest stage of the Stephanian Series was agreed 1971 by the IUGS Subcommission on Carboniferous Stratigraphy (SCCS) at the Krefeld Congress unanimously. This fact confront us with the necessity to transfer this new arrangement of the standard time-units at the Westphalian – Stephanian boundary into the relevant Czechoslovak beds.
