Leaders: Jurand Wojewoda, Stanisław Burliga & Paweł Raczyński
Fee: 330 €
The excursion is aimed at presentation of late Cretaceous evolution of north-eastern outskirts of the Bohemian Basin. Geological record of initial, mature and late stages of the basin development as well as influence of active tectonics on sedimentation and facies distribution will be shown. Selection of outcrops provides an excellent opportunity of studying transgressive, sea-deepening and regressive sequences. These are represented by transgressive lag, shallow marine nearshore and offshore rhythmically layered mudstones-to-conglomerates and coarsening upward clastic cyclothems. Proximal and distal tempestites as well as abundant fossils and trace fossils evidence strong impact of environmental conditions on sedimentation. Synsedimentary seismicity is indicated by gas and water escape structures, by soft sediment deformations and by unique giant-scale (up to 18 m) cross-bedded sandstone sets interpreted as accumulation terrace sediment association that was deposited along submarine escarpments generated by basement fault activity.
Excursion difficulty - easy to moderate; several uphill/downhill walks
Field gear requirements: Regular field gear for temperatures 5-35°C. Rainproof clothing may be necessary (weather unpredictable).