Góry Stołowe to obszar kojarzony z turystyką. Jednak w przeszłości były one zapleczem surowcowym. Prawdopodobnie już od wieków średnich pozyskiwano tu piaskowiec, który znalazł zastosowanie w architekturze europejskiej. Do tej pory opisano na tym terenie 69 stanowisk związanych z historyczną działalnością górniczą. Ich charakter jest bardzo różny – od małych wyrobisk przez kompleksy średnich, lecz licznych, aż do dużych wyrobisk po których zachowała się część infrastruktury.
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Stołowe Mountains are a popular tourist area. However, mining industry existed there in the past. Radków sandstone has been used in the European architecture from Middle Ages. Almost 70 sites of historic mining activity have been described here as a result of previous studies. Their character is very varied: these are isolated small pits and relatively big quarries or groups of outcrops as well as areas of extraction of rock without a distinct center of exploitation.
This article presents results of geophysical analyses based on electrical imaging of slope mantles with pit-and-mound microtopography developed on the Rogowa Kopa hillslope in the Stołowe Mountains, SW Poland. The use of two dimensional electrical resistivity tomography (2D ERT) to non-invasive analyses of the hillslope microrelief allowed completing previous results of geomorphological and soil studies. The tomograms (inversion results) acquired across individual forms of treethrow pits and mounds can be interpreted according to regolith thickness and its wetness, but also smaller features such as relict and fresh tree root systems detected in the mounds. These features were compared to a general picture of geoelectrical resistivity measured in the main cross-section of the analyzed hillslope. The differences in slope cover characteristics observed on the tomograms confirm important role of the tree uprooting process in formation of some basic features of the regolith and soils, including their uneven redistribution across the hillslope.
Upper Cretaceous fine-grained rocks (the “Plänermergel”) from the Stołowe Mountains are in general strongly bioturbated. The sections studied (180 m thick), located in the southern part of the mountains, are dominated by mudstones, marlstones and siltstones; sandstones, partly unbioturbated, are subordinate. The entire sequence shows a succession of ichnofabrics, which reflects a transgressive-regressive cycle (Cenomanian) and a regressive cycle (lower to middle/upper? Turonian). The trace fossil assemblage contains nine ichnogenera: Asterosoma, Cylindrichnus, Ophiomorpha, Palaeophycus, Phycosiphon, Planolites, Taenidium, Teichichnus, and Thalassinoides. Three basic types of ichnofabrics have been recognized: Ophiomorpha, Thalassinoides and Phycosiphon, all representing fully marine ichnofacies. The first two of these belong to the Cruziana ichnofacies, indicating the offshore zone, and the third one probably to the Zoophycos ichnofacies indicating a quiet shelfal setting below storm wave base.
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