The Arenig/Llanvirn boundary (Ordovician) in the Prague Basin (Bohemia)
Relations within the Klabava/Šárka Formations boundary interval at the Drahouš locality near Rokycany are described. In the lower part of the Šárka Formation, there is one biozone (Corymbograptus retroflexus Biozone) and Bouček’s (1973) horizons are of a local character. The Arenig/Llanvirn boundary is situated above the Klabava/Šárka Formations boundary, because the first appearance of Didymograptus spinulosus Perner is within the Corymbograptus retroflexus Biozone.
SNIP (Scopus, 2015): 0.700
IF (ISI, 2015): 1.326
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