Preliminary results of petrographic analysis of deposits in Łubienica-Superunki gravel pit

Osady piaszczysto-żwirowe pochodzące z transgresji stadiału młodszego zlodowacenia warty w ŁubienicySuperunkach zostały zbadane pod kątem składu petrograficznego frakcji średniożwirowej i grubożwirowej. Stwierdzono wyraźną przewagę skał krystalicznych, brak skał węglanowych oraz dziesięcioprocentowy udział piaskowców. Kwarc zmniejsza swój udział z około 9% we frakcji średniożwirowej do 0,6% we frakcji grubożwirowej. We frakcji 20–60 mm zidentyfikowano narzutniaki fennoskandzkie. Wśród nich były narzutniaki przewodnie z Wysp Alandzkich i sąsiadujących regionów Uppland i dna północnego Bałtyku oraz z obszaru południowo-wschodniej Szwecji (Småland). Wśród narzutniaków wskaźnikowych nie znaleziono ani jednego egzemplarza skały węglanowej.Sandy and gravel deposits, originating from the ice sheet transgression during the younger stadial of the Warthanian glaciation in Łubienica-Superunki, have been examined in terms of petrographic composition of the middle-coarse gravel fraction and pebble fraction. The distinct predomination of crystalline rocks, no carbonate rocks and a 10% share of sandstones have been ascertained. Quartz has reduced its share from about 9% in the middle-coarse gravel fraction to 0.6% in pebble fraction. The Scandinavian erratics have been identified within the 20–60 mm fraction. Among them the indicator erratics from the Åland Islands, neighboring Uppland, North Baltic bottom and Småland have been found. There was no single carbonate rock found among the so called statistical erratics

The most precious erratic boulders in Wielkopolska (Greater Poland) and their geotouristic potential

The article characterises 12 most precious erratic boulders ofWielkopolska in the aspects of their scientific, cultural, historical, educational and aesthetic values. They play an important role in the complex perception of geodiversity of the natural environment of the region. It is shown here that erratic boulders carry a geotouristic potential. The paper indicates how it can be utilised best

Conditions of sedimentation in the Weichselian glaciomarginal zone of northeast ern Germany

The conditions of glacigenic sedimentation during the Pomeranian Phase of the Weichselian Glaciation in northeastern Germany are reconstructed on the ba sis of the typical lithofacies successions and the depositional architecture of the distal and proximal parts of a sandur, as well as of those in the hinterland area of the glaciomarginal zone. The proximal parts of the sandur are characterized by the occurrence of boulders, pebbles and gravels, and horizontally stratified sands cut by large channel troughs in the upper parts. The occurrence of the channel structures indicates frequent torrential ablation floods. Horizontally and cross-stratified rhythms of sandy and gravelly lithofacies, indicating pulsatory ablation flows, are also frequent. The distal part of the sandur is dominated by horizontally stratified sands and sands with low- angle tabular cross-stratification. In the hinter land of the Pomeranian Glaciation, a thick layer of till is present, which locally is glaciotectonically deformed. Moraines left during glacial retreat, with gravity-redeposited till, are also present

Erratic boulders of the Drawa National Park (NW Poland) and their role in the development of local geotourism

The major attraction of the Drawa National Park is its main river, the Drawa. However, the park includes also other georesources that have a large natural potential to become geovalues, received by tourists as its geoproducts. This may lead to develop geotourism, which is a tool of sustainable socio-economic development of the region. The article presents the erratic boulders, which are primarily the objects of geological heritage. Erratic material is also present in the cultural heritage of the region, e.g. in the churches, cobbled roads, hydraulic engineering constructions or as stone monuments, signposts, and forest departmental posts

Głaz św. Jadwigi

The biggest erratic block in Wielkopolska (St. Hedwig Rock) is located in situ is south-east part of the region. This indicator erratic, Smaland granite, was transported onto Polish Lowland around 18,8 ka BP. Because of its size the rock is protected by law. Although its scientific, didactic and geotouristic values have been described by the Polish Geological Institute as the highest, the inhabitants of adjacent cities have little awareness of natural heritage in the region

Erratic boulders in Łubienica-Superunki

Na przykładzie głazów narzutowych ze żwirowni Łubienica-Superunki zaprezentowano ich walory naukowe, edukacyjne, estetyczne oraz wartości kulturowe i konserwatorskie. Wskazano także potencjał geoturystyczny, jaki ukryty jest wśród dużych eratyków skandynawskich, znajdujących się na terenie Polski.The scientific, educational, aesthetic, cultural and conservation values of erratic boulders have been presented on the example of boulders from the Łubienica-Superunki gravel pit. The potential of geotourism, which is hidden among Scandinavian boulders, is also indicated

Ochrona przyrody nieożywionej na terenie Wielkopolskiego Parku Narodowego

The collection of 20 erratics complements the exhibition of diverse forms of biotic and abiotic nature of the Wielkopolski National Park. Within the rocks there are examples of magmatic, sedimentary and metamorphic ones. The most interesting are indicator erratics, derived in known Scandinavian mother regions and transported onto Polish Lowland around 18,8 ka BP. The petrographic garden plays didactic and geotourist role and stays for a favourite weekend direction

Petrographic study of glacial sediments : an outline of the problem

W pracy omówiono kompleksową analizę petrograficzną osadów lodowcowych, obejmującą frakcję żwirów średnioziarnistych i gruboziarnistych. Podano cel i zakres badań oraz zaprezentowano znaczenie i rolę analiz petrograficznych. Przedstawiono zależność składu petrograficznego od frakcji osadu i jego genezy. Analizę petrograficzną omówiono w aspektach terenowym, laboratoryjnym i kameralnym. Podano również możliwości zastosowania analizy petrograficznej do celów litostratygraficznych oraz poznawczych w świetle analizy materiału kamiennego budującego obiekty dziedzictwa kulturowego.The paper discusses a comprehensive Polish petrographic study of glacial sediments, including a fine and coarse gravel. The purpose and scope of research as well as the importance and role of the petrographic analysis is presented. The dependence of petrographic composition on the sediment fractions and its genesis is discussed. The petrographic analysis is discussed in the aspects of field, laboratory and intimate work. The paper provides the possibility of applying for the petrographic analysis due to lithostratigraphic purposes; it also shows how stone buildings of cultural heritage can be analysed in the light of the petrographic analysis

The role of stone in Pruszków urban space

The geological heritage of Pruszków is absent in the inhabitants’ consciousness, even though it is within their reach. In addition to the short characteristics of geodiversity of the area, the paper also presents eight large boulders and other stone elements in the town. They have a great potential in playing cognitive, educational, cultural-historical, geo-conservative and aesthetic roles. These functions can be used in the development of urban geotourism and in shaping the town’s image in accordance with the principles of sustainable development

Petrographical differentiation of Pleistocene deposits of Myoelibórz Lakeland (Western Pomerania) based on gravels from Chełm Górny and Cedynia

Petrographical content of Pleistocene gravels (4–10 mm) derived from till and glaciofluvial deposits of Western Pomerania was studied. The coarse-grained gravels (20–60 mm) have been additionally investigated for indicator erratics. There are three dominant petrographical groups within the gravels regardless of genetic type of sediments: crystalline rocks, Lower Paleozoic limestones and sandstones. Indicator erratics indicate the most effective glacial erosion in south-eastern Sweden. Theoretical stone center is located at 57.7°N and 16°E, that is in Smĺland. Other regions where the ice sheet could have been nourished were located in Dalarna and Ĺland Islands. The most numerous erratics found in the glacial sediments are: Smĺland granites and quartz porphyries, Ĺland rapakivi granites and quartz porphyries, Bredvad porphyries, Venjan and Grönklitt porphyrites