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Petrology and geochemistry of Devonian volcanic rocks in the southern part of the Šternberk-Horní Benešov Belt
Řihošek, Jaroslav ; Kachlík, Václav (advisor) ; Přichystal, Antonín (referee)
Šternberk-Horní Benešov belt (SHB) is built by Devonian and Lower Carboniferous rocks located between Culmian Eastern Jeseníky and Western Jeseníky nappes. As the SHP is located in the Low Jeseníky Mountains , it is a part of Rhenohercynian zone of European Variscides. The southern part of SHB is built by a volcanic complex of intrusive rocks, lavas and volcanoclastic rocks with intercalated beds of Stínava- Chabičov shales. Alkaline volcanism in Rhenohercynian zone was earlier interpreted as a result of extension in back-arc basin. Structural measurements of this study proved, that volcanosedimetary succession (situated north eventually northward) of Šternberk) is a tectonic slice. This slice was dragged out on the base of the Culmian greywacke nappe during the Variscan orogeny. Firstly the slice was thrusted northeastwards over the body of younger Culm greywacke. After that, the stack of nappes (including the Devonian volcanic rocks ) was sheared in dextral transpressional regime. The field works also indicated, that the Devonian vol- canic complex was tectonically separated from its stratigraphic footwall and hanging- wall. Volcanic rocks gradually built an elevation, eventually reaching the sea level. Anal- ysis of volcanic facies proved that the most of volcanoclastic rocks was deposited near...
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Okrouhlík. Excavation of Mesolithic settlement area in the Kamenice river canyon
Svoboda, Jiří ; Hajnalová, M. ; Horáček, I. ; Novák, Martin ; Přichystal, A. ; Šajnerová, A.
This paper introduces a group of newly discovered Mesolithic rockshelter sites, clustered at the confluence of two rocky canyons in the sandstone region of North Bohemia, Czech Republic (Dolský Mlýn, Šamanská rokle, Prasečí převis, Ferdinandova soutěska, Kostelní rokle). The Okrouhlík rockshelter, representative of the Early Mesolithic stage, was excavated almost completely, demonstrating internal within-site patterning: a central hearth, system of surrounding kettle-shaped pits, and two large, stone-filled, marginally located hearths. Analyses of the environmental data, fauna, and raw material, typological and use-wear analyses of lithic artifacts are included.
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Flint Axes from Central Poland in Moravia
Přichystal, A. ; Šebela, Lubomír
This paper presents the Moravian finds of flint axes made of banded Krzemionki flint (14 pcs.) and spotted Swieciechów flint (3 pcs.) transported from central Poland. The first group of artefacts is connected to the Globural Amphora Culture, the second to the Corded Ware Culture.
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