Abstract
Abstract The sedimentary sequence of a totally eroded carbonate platform on the shelf of Fennosarmatia in Poland has been reconstructed based on the analysis of detrital material derived from the platform and deposited in an adjacent basin. The database was taken from a polymictic debrite unit intercalated in the Viséan basinal succession exposed in the southwestern Holy Cross Mountains. The unit represents a gravity-flow deposit and contains carbonate clasts ranging from Frasnian to Viséan in age. They provide evidence for a Frasnian carbonate platform located south of the Holy Cross area that drowned during Famennian and Tournaisian times but subsequently, during the early Viséan, started to recover. This reversed trend is interpreted to have resulted from the combined effect of eustatic sea level fall and tectonic uplift. The geographical extent of the inferred carbonate platform system, named here as the Nida Platform, cannot be precisely outlined, but most probably corresponded with the Jedrzejow High, an elevated fragment of Precambrian basement.
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