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Guide to geological excursion in surroundings of Ostrava
Vašíček, Zdeněk ; Martinec, Petr ; Kožušníková, Alena ; Konečný, Pavel
The paper describes the most interesting geological localities in Ostrava region. Landek is unique outcrop of Carboniferous sediments of Upper Silesian Basin (Namurian A). Zámek Conglomerate outcrop is an important locality of the Poruba Member occurring near Silesian-Ostrava Castle. Exploitation of Pleistocene glacial gravels will be visited in Lake Kališčák near Bohumín. Geological “men made” locality is Ema dump which consists of waste rocks of Ostrava Formation.
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Výskyt uhlí v okolí Erigava (Republika Somailand)
Konečný, Pavel ; Oliwkiewicz-Miklasinska, M.
The occurrence of Jurassic to Miocene coal in Republic Somaliland was described in literature. Some coal samples were collected in 2007 near Erigavo. On the base of palynological analysis the Jurassic age is suggested for examined coal. Content of ash of tested sample was 71,24% so that the sample is classified as a carbonaceous siltstone. The reflectance of huminite is RN = 0,33 %. Based on this data the next geological investigation was recommended. The occurrence of Jurassic to Miocene coal in Republic Somaliland was described in literature. Some coal samples were collected in 2007 near Erigavo. On the base of palynological analysis the Jurassic age is suggested for examined coal. Content of ash of tested sample was 71,24% so that the sample is classified as a carbonaceous siltstone. The reflectance of huminite is RN = 0,33 %. Based on this data the next geological investigation was recommended.
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Laboratorní měření rychlosti průchodu ultrazvukových vln za trojosého stavu napjatosti
Konečný, Pavel
Measurement of the ultrasonic wave velocity on rock samples is one of the standard methods of laboratory study of geomaterials. However, the utrasonic wave velocity change due to impact of state of stress. Therefore, the measuremet is performed both in uniaxial and triaxial state of stress to study the ultrasonic wave velocity changes in the process of loading. The method of measurement in triaxial state of stress and first results are presented in this paper.
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