A3: Carboniferous depositional history of the Variscan foreland in Moravia and Silesia: From deep-marine to continental settings

3 days, June 19–21, 2021, Czech Republic; Trip leaders: Kumpan, T.1, Šimíček, D.2, Nehyba, S.1, Jirásek, J.3, Sivek, M.3
1Masaryk University, Czech Republic; 2Palacký University, Czech Republic; 3Technical University of Ostrava, Czech Republic Contact:   kumpan.tom@gmail.com  
Price: 390 EUR
 
Transportation: bus; Participants: Minimum 15, Maximum 25
Departure: Prague, Hotel Diplomat (6:00); Return: Prague, Hotel Diplomat
Includes: field trip guidebook, transportation, accommodation, breakfasts, lunch packets, snacks and dinners.
Degree of physical difficulty: Intermediate level of physical fitness is required. The trip will include short walks (trekking shoes are recommended). Hard hats will be provided.
 
A three-day traverse will provide a full overview of the development of the Variscan Moravo-Silesian Basin, from pre-orogenic to post-orogenic deposition. The sedimentary successions are parts of the Rhenohercynian Zone of the Varsican belt and represent a counterpart of the German Rhenish Mountains. The main motive of first two days of the field-trip will be gravity-flow facies, from uppermost Devonian calciturbidites to Viséan-Serpukhovian synorogenic silciclastic turbidites. During the first day, Famennian and Tournaisian pre-orogenic calciturbidites of the Moravian Karst and syn-orogenic Culmian facies of the Drahany Upland in the vicinity of Brno city will be inspected. Second day will be dedicated to the Culmian facies of the Nízký Jeseník Mountains. Various types of turbidites and debrites of the foreland basin will be studied in several quarries and road-cuts. The history of extensive slate mining since the Middle Ages in the ‘Slate Country’ of the Nízký Jeseník region will be shown in the Slate museum of Budišov nad Budišovkou. The field trip will end with a visit of the coal-bearing paralic succession in the region of Ostrava that was deposited in the final “molasses-stage” of the Variscan orogeny in the Upper Silesian Basin.
 
 
Left: Upper Viséan turbidites of the Hradec-Kyjovice Formation affected by fold-and-thrust tectonics in the old quarry at Stará Ves; Right: Rhythmic alternation of shales, siltstones and sandstones produced by low-density turbidity currents. Upper Viséan, Mokrá quarry.
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