The Mšeno-Roudnice Basin: problems of reconstruction of fossil stream pattern (Central Bohemian Coal Basins, Czech Republic)

The Mšeno-Roudnice Coal Basin is an eastern part of the Central Bohemian Carboniferous Coal Basins. The total thickness of the Carboniferous sediments is ranging from several tens of metres in the south up to nearly 1 km in the basin centre. The basin was explored by nearly 55 deep boreholes with the aim to explore coal reserves. The seismic exploration in the basin has been carried out, too. Fossil stream pattern was reconstructed, of which rivers eroded the upper part of the Slaný Formation sediments during the intra-Stephanian hiatus between the Slaný and Líně Formation (Stephanian B/C). The project could have been realized due to some drilling close to seismic profiles, and also at least due to locally favourable seismological conditions. The results allowed to decipher the anomalous depositional structure of the Slaný and Líně formations that was difficult to be defined earlier. The results showed that some tectonic movements occurred towards the end of the Stephanian B which resulted in giving rise of erosional activity of ancient streams