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Na Javorce Cave - a new discovery in the Bohemian Karst (Czech Republic): unique example of relationships between hydrothermal and common karstification.
Dragoun, J. ; Žák, Karel ; Vejlupek, J. ; Filippi, Michal ; Novotný, J. ; Dobeš, J.
The Na Javorce Cave is located in the Bohemian Karst, Czech Republic, about 25 km SW of Prague. The cave was formed in vertically dipping layers of Lower Devonian limestone; it is 1,723 m long and 129 m deep, of which 9 m is permanently flooded. The cave is polygenetic, with several clearly separable evolutionary stages. Cavities discovered to date were mostly formed along the tectonic structures of two main systems. One of these systems is represented by vertical faults of generally N-S strike, which are frequently accompanied by vein hydrothermal calcite with crystal cavities. The second fault system is represented by moderately inclined west-dipping faults. Smaller tube-like passages of phreatic morphology connect the larger cavities. The fluid inclusion data obtained for calcite developed along both fault systems in combination with C and O stable isotope studies indicate that the hydrothermal calcite was deposited from moderately NaCl-type basinal fluids (0.5 to 8.7 wt. % NaCl equ
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Cave formation initiated by dissolution of carbonate cement in qartzose sandstones
Adamovič, Jiří ; Mikuláš, Radek ; Navrátil, Tomáš ; Mertlík, J.
Besides cavities of irregular shape, European sandstones also feature symmetrical cavities of spherical, ellipsoidal or teardrop shapes. Most of them are tens of centimetres across but some reach as much as 2–3 m in diameter and may coalesce into large caves tens of metres in length. Their origin has not been clearly explained yet. Based on the field comparison between such cavities in quartzose sandstones and incompletely developed cavities in carbonate-cemented sandstones, it can be demonstrated that the symmetrical cavities form by carbonate dissolution within the limits of former carbonate concretions. The diagnostic features of post-concretionary cavities include their circular or elliptical cross-section, a uniform orientation of their long axes across the region, and the presence of a set of parallel vertical joints or grooves/ribs on their inner walls. In some sandstone areas (e.g., Petite Suisse area in Luxembourg, Kokořín area in the Czech Republic), a wide variety of transitional forms can be found between the cavities and concretions forming positive relief on a vertical cliff face, depending on the position of the carbonate dissolution front in the present landscape.
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Research and its application in practise
Kršiaková, Anna ; Kröschlová, Eva (vedoucí práce) ; Dočolomanský, Viliam (oponent) ; Císař, Jan (oponent)
Práca prináša a systematizuje poznatky získané z výskumu brazílskych kultúrnych foriem počas expedícií medzinárodného divadelného štúdia Farma v jeskyni v Brazílii v rokoch 2008 ? 2009 a ich následné spracovanie a premenu do špecifického divadelného jazyka. V práci je sústredená pozornosť na tvorbu hereckých partitúr počas dvojročnej prípravy predstavenia Divadlo v jednotlivých etapách ich spracovania
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Paleomagnetický výzkum sedimentárních výplní vybraných jeskyní v České republice : závěrečná zpráva k výjimce MŽP ČR
Bosák, Pavel ; Hercman, H. ; Kadlec, Jaroslav ; Pruner, Petr ; Schnabl, Petr ; Hlaváč, Jaroslav ; Drahotová, Jana ; Pavková, Jaroslava ; Petráček, Jiří ; Rajlichová, Jana ; Drbal, K. ; Komaško, A. ; Milka, D.
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