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Problematické aspekty ichntaxonomie: tafosérie, "fotosérie" a "grafosérie"
Mikuláš, Radek
The probability of misidentification of trace fossils is extremely high if the authors did not see the original material but used only published photographs. Clearly, it is impracticable to visit all the collections containing the revised material and impossible to visit all type localities, but further caution against the use of photos or drawings must be done here. Photographed material can result in the effect named here “photoseries”: just the method of illumination of the object can make it classifiable as two different ichnotaxa. Diffuse light enables an annulate tunnel to be featured as Rhabdoglyphus, but raking light depicts instead “invaginated segments” of Fustiglyphus of idealized drawings is obviously even more problematic, as shown by nice “graphoseries” if we consider the original specimen, the method of its preparation, and the published figure.
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Guide to the Post-conference excursion Sandstone Landscapes: Diversity, Ecology and Conservation
Mikuláš, Radek ; Adamovič, Jiří ; Cílek, Václav ; Hendrych, J. ; Líčenková, M. ; Mertlík, J. ; Mrkáček, Z. ; Petříček, V. ; Tomášek, O. ; Šoltysová, L. ; Vacková, D. ; Herben, Tomáš ; Kopřivová, L.
The Kokořínsko PLA, Bohemian Paradise PLA and Polická vrchovina Highland represent a high-diversity "sandstone phenomenon". Sandstones of the Bohemian Paradise can be considered as optimum for development of microrelief features influenced by saet erosion and case hardening.
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Blanice Graben. Field Trip 1A
Martínek, K. ; Drábková, J. ; Mikuláš, Radek ; Šimůnek, Z. ; Zajíc, Jaroslav
Lithostratigraphic, biostratigraphic, and paleontological (fauna, flora, spores, ichnofossils) data of the Blanice Graben are summarized. The tectonic and kinematic model of the basin is done. Five important localities are described.
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Pseudokarst caves in the sandstone rocks at Tisá and Rájec (Northern Bohemia)
Mikuláš, Radek
The area Tisá and Rájec is well known as an excellent example of "castellated sandstones". However, its caves, though common and interesting, have never been described in more detail. The caves occur often in upper parts of rock pillars, therefore, most of them are accessoble only by climbers. The most impressive example is the "Cave of the Falcon Tower" , i. e., a systém of narrow horizontal tunnels in two levels, reaching more than 20 m in length.
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