Geologia
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ISSN 0138-0974
e-ISSN: 2353-0782
Issue Date
2009
Volume
T. 35
Number
Nr 2
Description
Journal Volume
Geologia
T. 35 (2009)
Projects
Pages
Articles
Tlenki manganu z diabazów Niedźwiedziej Góry koło Krakowa
(Wydawnictwa AGH, 2009) Muszyński, Marek; Rzepa, Grzegorz; Skowroński, Andrzej
Black manganese oxides from the polymineral veins found in 1998 in the so-called diabases of Niedźwiedzia Góra near Kraków have been identified (XRD, IR, DTA-TG, SEM/EDS, EPMA/WDS) as intermediate members of the rancieite-takanelite series. In comparison with the minerals of this series described in the literature, they reveal elevated contents of iron and barium and relatively low contents of calcium. In the probable succession of components of the veins mentioned, the Mn oxides occupy the before last position: goethite +/- saponite $\to$ <b>tension</b> $\to$ barite, thin prismatic-acicular quartz $\to$ <b>leaching</b> $\to$ Mn oxides, prismatic quartz. They must have crystallized from descensive waters associated with surface weathering of the diabases, which took place when overlaying Carboniferous rocks had been eroded. The weathering diabases were a probable source of manganese.
Nowe jednostki litostratygraficzne w randze warstw w obrębie formacji gogolińskiej (trias środkowy) na Śląsku Opolskim
(Wydawnictwa AGH, 2009) Kowal-Linka, Monika
The Zakrzów Crinoidal Limestone Member is subdivided into the three subordinate units: the Krapkowice Pelitic Limestone Bed built of thin-bedded, wavy-bedded and crumpled marly pelitic limestones, the Dąbrówka Bioclastic Limestone Bed consisting of thick- to medium-bedded, cross-bedded bioclastic limestones (crinoidal), the Podbór Bioclastic Limestone Bed built of thin- to medium-bedded bioclastic limestones, pelitic limestones and intraformational conglomerates. The lower part of the Skała Marl Member consisting locally of the intraformational conglomerate with big intraclasts covered by the intraformational conglomerate with small intraclasts is designed as the Kocina Intraformational Conglomerate Bed. The Emilówka Cellular Limestone Member is subdivided into the two subordinate units: the Karłubiec Bioclastic Limestone Bed built of thin-to medium-bedded bioclastic and pelitic limestones and the Otmęt Marly Limestone Bed consisting of strongly porous, thin-bedded marly limestones (dedolomites).
Malakofauna górnoholoceńskich martwic wapiennych w Beskidach Zachodnich (południowa Polska)
(Wydawnictwa AGH, 2009) Alexandrowicz, Witold Paweł
Upper Holocene calcareous tufa occur commonly in the Western Beskidy Mts. Often, at least not always they contain more or less rich and differentiated molluscan assemblages. Malacological analysis was carried out on the basis of material collected from 33 localities represented by 59 samples. The most typical communities of snails and bivalves were characterized. Four types and three subtypes of fauna differing oneself in structure and species composition have been distinguished. Malacofauna recognized in discussed calcareous deposits is closely depended on local conditions. The whole material comprises 68 species, but only a few of them occur in large numbers and in many profiles, while the remaining ones had only accesorical importance. Malacological investigations of Upper Holocene calcareous tufa are important for recognizing mechanisms of deposition such calcareous sediments and differentiation of molluscan assemblages. They can be useful for actuopelaeontological analysis essential for palaeogeographical and palaeoecological interpretations of tufas of Holocene and Late Glacial age occurred in Southern Poland.
Struktury komórkowe w obrębie piaskowców magurskich na przykładzie Diabelskich Ścian (pasmo Jaworzyny Krynickiej)
(Wydawnictwa AGH, 2009) Kicińska, Alicja
On the walls of rock pulpits built of thick-bedded sandstones belonging to the Magura Unit and located in the Jaworzyna Krynicka Range (the Beskid Sądecki Mts) one can observe oval and elliptical cavities, and open spaces. These forms originate from selective weathering and suffosional washout of weathered detrital material from interbedding planes. In studied samples the differences were demonstrated in mineral composition of rocks, mostly the presence of gypsum. Moreover, contents of selected elements were determined in selected parts of the Devil's Rocks. The main factor controlling the formation of rock pulpits is their location close to the summit supported by infiltration of meteoric waters through coarse- and medium-grained sandstoned cut by vertical fissures. Environment pollution, especially the presence of sulphur and nitrogen oxides in the atmosphere, results in salt weathering caused by precipitation of new minerals (gypsum), which may facilitate disintegration of rock structure. Geometry of cavities is controlled by the bedding of rocks and the physical properties of dominating minerals (mostly quartz).
Monitoring geodynamic processes using geodetic and gravimetric methods: an example from the Western Carpathians (South Poland)
(Wydawnictwa AGH, 2009) Łój, Monika; Madej, Janusz; Porzucek, Sławomir; Zuchiewicz, Witold
Zintegrowane studia grawimetryczne, geodezyjne i geologiczno-geomorfologiczne przeprowadzono na dwóch profilach przecinających szereg jednostek środkowej części Karpat polskich, wykazujących zróżnicowane tendencje neotektoniczne: w poprzek Kotliny Orawskiej na zachodzie oraz wzdłuż beskidzkiego przełomu Dunajca na wschodzie. Pomiary grawimetryczne i geodezyjne wykonywano corocznie w okresie 2004--2006. Ich wyniki wskazują na współczesną subsydencję Kotliny Orawskiej, szczególnie intensywną w obrębie rowu Wróblówki. Dane uzyskane dla profilu Dunajca nie ujawniają większego zróżnicowania pomiędzy poszczególnymi punktami pomiarowymi, co może sugerować słabe wypiętrzanie całego obszaru i/lub minimalne różnice mobilności kolejnych łusek płaszczowiny magurskiej oraz pienińskiego pasa skałkowego. Przemieszczenia poziome reperów usytuowanych w obrębie Karpat zewnętrznych, a skierowane ku zachodowi i SW w profilu zachodnim oraz ku wschodowi i SE w profilu wschodnim, mogą odzwierciedlać wypiętrzanie obszaru ograniczonego profilami, tj. masywu Gorców. Natomiast skierowane ku północy i NNE wektory współczesnych ruchów poziomych dla stanowisk ulokowanych na południe od pienińskiego pasa skałkowego zdają się wskazywać na nadal aktywny nacisk bloku ALCAPA ku NNE.