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    Wyświetlanie 1-12 z 12
    Tytuł:
    Garnet provenance in mixed first-cycle and poly-cycle heavy-mineral assemblages of the Ropianka and Menilite formations (Skole Nappe, Polish Flysch Carpathians): constraints from chemical composition and grain morphology
    Autorzy:
    Salata, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/973614.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    detrital garnet
    mixed provenance
    protolith location
    flysch
    Skole Nappe
    Carpathians
    Opis:
    Garnet in heavy-mineral assemblages, occurring in sandstones of the Campanian–Maastrichtian part of the Ropianka (Late Cretaceous–Palaeocene) and Menilite (Oligocene) formations of the Skole Nappe, is present as first-cycle and poly-cycle grains, derived from a proximal source, remote areas and/or from sedimentary rocks of the Skole Basin foreland. The garnets in the formations are compositionally similar, suggesting an origin from the same source rocks. Relatively large amounts of garnet, represented by euhedral or slightly rounded, weakly etched or unetched almandine and spessartine-almandine garnet, and minor pyrope-enriched almandine, were derived directly from a source close to the Skole Basin. These garnets are from sediments, metamorphosed at low- to medium-grade conditions (such as mica-schists, gneisses) and perhaps also granitic bodies. Rounded and variously etched garnets, especially high pyrope-almandine and pyrope-almandine-grossular varieties, but also partly almandine-dominated varieties, are suggested to have been derived from distant sources, such as sedimentary rocks of the Upper Silesian and Małopolska blocks. Rocks, forming uplifted parts of the crystalline basement of Brunovistulicum and/or crystalline domains of the Bohemian Massif, could have been protoliths for part of the almandine-dominated garnet population, whereas pyrope-grossular-almandine garnets may originate from the granulitic, eclogitic or metabasic rocks of the Bohemian Massif. The study shows that analyses of garnet composition, combined with observations on grain textural features and data on the lithology of clasts and pebbles, can permit the determination of sources for different garnet varieties in mixed-provenance populations.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 3; 161-177
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ opadu i infiltracji na zasilanie paleogeńskich poziomów wodonośnych w skałach fliszowych Beskidu Sądeckiego
    Influence of precipitation and infiltration on recharge the Paleogene aquifers of the Beskid Sądecki flysch
    Autorzy:
    Buczyński, S.
    Wcisło, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2062173.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    wahania zwierciadła wód podziemnych
    opad
    zasilanie
    flisz
    Karpaty
    groundwater dynamics
    precipitation
    recharge
    flysch
    Carpathians
    Opis:
    W artykule przedstawiono wyniki badań wpływu opadów i infiltracji na zasilanie paleogeńskich poziomów wodonośnych w skałach fliszowych. Badania wskazują, że wielkość zasobów eksploatacyjnych w rejonie Tylicza wiąże się ściśle z reżimem zasilania, dlatego też w pracy określono terminy występowania stanów charakterystycznych zwierciadła wód podziemnych oraz amplitud wzniosu i spadku zwierciadła na tle wielkości opadów i infiltracji.
    The paper describes research on the effect of precipitation and infiltration on the groundwater recharge of the Palaeogene aquifer. Since the safe yield in the Tylicz region is closely linked to the recharge regime, the dates of occurrence of specific groundwater levels and amplitudes of water table increase and decrease have been characterised. These data have been discussed on the background of precipitation and infiltration rates.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2013, 456 Hydrogeologia z. 14/1; 57--62
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wodonośności utworów fliszowych w rejonie Muszyny na podstawie badań źródeł
    Assessment of water-bearing capacity of flysch deposits in the Muszyna region based on spring investigation
    Autorzy:
    Józefko, I.
    Oszczypko, N.
    Kukuła, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2062248.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    wodonośność
    źródła
    wody podziemne
    flisz
    Muszyna
    Karpaty
    water-bearing capacity
    springs
    groundwater
    flysch
    Carpathians
    Opis:
    W pracy zaprezentowano wyniki badań hydrogeologicznych prowadzonych w rejonie Muszyny. Na podstawie analizy wyników badań naturalnych wypływów wód podziemnych, po uwzględnieniu budowy geologicznej i wyników badań hydrologicznych, oceniono wodonośność utworów fliszowych, co umożliwiło dyskusję na temat zmienności wodonośności na obszarze współwystępowania wód zwykłych i mineralnych.
    This paper present the results of hydrogeological studies conducted in the Muszyna region. Based on the results of the analysis of natural groundwater discharges, and taking into account the geological structure and the results of hydrological studies, the water-bearing capacity of flysch rocks has been rated. This allowed discussing the water-bearing capacity in the area of drinking and mineral water co-occurrence.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2013, 456 Hydrogeologia z. 14/1; 233--241
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioturbation structures of the Kropivnik Fucoid Marls (Campanian-lower Maastrichtian) of the Huwniki-Rybotycze area (Polish Carpathians)
    Autorzy:
    Leszczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058753.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Carpathians
    Upper Cretaceous
    marlstone
    flysch
    trace fossils
    Opis:
    The Kropivnik Fucoid Marls of the Polish Outer Carpathians contain numerous bioturbation structures, and comprise thin-bedded sandstones, hard and soft marlstones and muddy to clayey, mainly turbiditic shales. Comparison of three sections elucidated the stratigraphic and sedimentological controls on the distribution of the bioturbation structures, which are most common on the soles of sandstone beds, and within and on the tops of beds of hard marlstone overlain by shale. Most of the bioturbation structures are taxonomically undeterminable. Nevertheless, twenty seven ichnospecies, including one new ichnospecies (Taenidium recurvum), and seven forms of trace fossils of unknown taxonomic affinity were recognised. Most ichnotaxa were observed as individual specimens. Irregular structures apparently formed by the squashing of burrows filled with fluidised fill, called here turbidichnia, are quite common in some marlstone beds in the lower part of the succession. Planolites beverleyensis and Halopoa imbricata are the most frequent trace fossils on the lower surfaces of sandstone beds. Chondrites intricatus, Planolites beverleyensis and Thalassinoides suevicus represent the most common taxa in hard marlstones. Endoreliefs of Scolicia isp. are quite frequent in the top parts of marlstone beds in some parts of the succession. Other ichnotaxa were found either rarely or as single specimens only. The burrowing depth, reaching 15 cm below the tops of normally-graded rhythmic units, together with the relatively rich trace fossil assemblage and common occurrence of Planolites and Thalassinoides, is interpreted as indicating fully oxic conditions at the bottom of the sedimentary basin.
    Źródło:
    Geological Quarterly; 2004, 48, 1; 35--60
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on heavy minerals from the Upper Cretaceous-Paleogene flysch of the Beskid Śląski Mts. (Polish Carpathians)
    Autorzy:
    Grzebyk, J.
    Leszczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058926.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Carpathians
    Paleogene
    Upper Cretaceous
    heavy minerals
    provenance
    Opis:
    The types, abundance and origin of non-opaque heavy minerals from17 samples of sandstones and granule conglomerates of the Godula Beds, Upper Istebna Sandstone, Ciężkowice and Cergowa Sandstone (Upper Cretaceous–Paleogene) of the Beskid Śląski Mts. are described in this study. The descriptions are based on standard optical petrographic investigations and on scanning electronmicroscope (including electron microprobe) analysis. Garnet, rutile, zircon and tourmaline are the most common types of heavyminerals. Monazite and apatite occur subordinately, whereas epidote and spinel are sporadic. The heavy minerals from the Middle and Upper Godula Beds and the Upper Istebna Sandstone indicate original derivation mainly from metamorphic rocks of granulite and partly eclogite facies. Metasediments were significant constituents, with subordinate granitoids and hornfelses. Granitoids and corresponding pegmatites and aplites, as well as metapelites and metapsammites, appear to be the primary crystalline parent rocks of the Lower Godula Beds and the Ciężkowice Sandstone. Garnet-mica schists with subordinate granitoids and their pegmatites are interpreted as the main crystalline parent rocks of the Cergowa Sandstone. Sporadic chromian spinels and chromian pyrope indicate derivation from mafic and ultramafic rocks. Co-occurrence of rounded and fresh unabraded grains (sometimes euhedral) suggests a mixed provenance for the clastic material, both from crystalline and older sedimentary rocks.
    Źródło:
    Geological Quarterly; 2006, 50, 2; 265-280
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detrital rutile U-Pb geochronology of the Alpine convergence in the External Western Carpathians
    Autorzy:
    Doliwa Zieliński, Ludwik de
    Potočný, Tomáš
    Bazarnik, Jakub
    Kooijman, Ellen
    Kośmińska, Karolina
    Mazur, Stanisław
    Majka, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/24202123.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Alpine
    Carpathians
    flysch
    Opis:
    The Carpathian Flysch Belt represents a Paleogene accretionary wedge (External Western Carpathians  – EWC) located in front of the narrow Pieniny Klippen Belt zone and the Cretaceous Central Western Carpathian nappe stack. The Flysch Belt is formed of several nappes thrust over the slope of the European Platform in the Miocene. This study is focused on the uppermost Magura Nappe, which consists of the Rača, Bystrica and Krynica subunits. As there are no relics of pre-Miocene oceanic crust in the EWC, the sedimentary rocks of the Flysch Belt are the only source of information available about the Alpine collisional events. U-Pb geochronology was applied to detrital rutile from sandstones of the Magura Nappe in order to better understand the closure of the Alpine Tethys in the Western Carpathians. Ten medium-sized sandstone samples were collected across the Bystrica and Krynica subunits in the Nowy Targ region in southern Poland. The samples represent synorogenic clastic sediments with inferred deposition ages between the Late Cretaceous and Oligocene. Approximately 200 rutile grains were separated from each sandstone sample and around half of them were selected for further analyses. The age and appearance (shape, inclusions, zoning etc.) of the dated rutile show significant variations, suggesting derivation from various sources. The most prominent age peaks represent the Variscan (c. 400–280 Ma) and Alpine (c. 160–90 Ma) tectonic events which are well-pronounced in all but the oldest dated sample. It is also noteworthy that four distinct Alpine signals were detected in our rutile data set. The two most prominent peaks with ages of 137–126 Ma and 115–105 Ma are found in majority of the samples. In two sandstone samples, deposited between the Eocene –Oligocene and the Late Cretaceous–Paleocene, the youngest peak of 94–90 Ma appears. Another peak of 193–184 Ma is also present in these two samples, as well as in another sandstone deposited between the Paleocene and the Eocene. In addition, most samples show few Proterozoic ages (approx. 1770 Ma, 1200 Ma, 680 Ma and 600 Ma). Since metamorphic rutile requires relatively high pressure to crystallize, its formation in the course of an orogeny is possible in a subduction setting. Hence, our new age data may reflect tectonic events related to subduction of oceanic crust and overlying sediments. Tentatively, we propose that recognizable events include the Jurassic subduction of the Meliata Ocean (~180–155 Ma), the Early Cretaceous thrust stacking of the Veporic and Gemeric domains (140–105 Ma) and possibly the Late Cretaceous subduction of the Váh Ocean (c. 90 Ma). In addition to dating, the Zr content of the rutile formed during the Alpine orogeny was measured by electron microprobe at the AGH University in Krakow. The amount of Zr varies between 37–420 ppm in almost all grains, with the exception of 4 rutile grains where ~1100 ppm was reached. The Zr in rutile thermometer, based on the approach of Kohn (2020) was used to calculate the possible metamorphic conditions at 450–650°C and >7.5 kbar. This data set corroborates formation of the Alpine rutile under relatively high pressure and rather low to moderate pressure/temperature gradient, i.e. typical of subduction-related tectonic environments.
    Źródło:
    Geotourism / Geoturystyka; 2023, 1-2 (72-73); 84--84
    1731-0830
    Pojawia się w:
    Geotourism / Geoturystyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depositional setting of the Oligocene sequence of the Western Carpathians in the Polish Spisz region : a reinterpretation based on integrated palynofacies and sedimentological analyses.
    Autorzy:
    Filipek, A.
    Wysocka, A.
    Barski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060582.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Podhale flysch
    Oligocene
    Carpathians
    palynofacies analysis
    sedimentological analysis
    Opis:
    The research on the Oligocene succession of the Central Carpathian Paleogene Basin (CCPB) in the Kacwin region focused on sedimentological and palynofacies analyses. Observations were carried out in natural exposures along three streams flowing in the Polish Spisz: Kacwinianka, Łapszanka and Kacwiński. Three main groups of lithofacies have been distinguished: coarse-grained, mixed and sandy-grained, and fine-grained. The lithofacies are characterized by variable sedimentary structures, e.g. massive structure, horizontal lamination, ripple cross-lamination, hummocky cross-stratification, deformation structure. Sedimentological analyses showed that structures typical for turbidity currents and those characteristic of relatively shallow deposition (HCS, wave ripples) could coexist in the investigated succession interpreted as typical for turbidity currents influenced by storm waves. This indicates relatively shallow-water environments. The palynofacies analysis enabled identification of the following components: black wood, brown wood, cortex, resin, sporomorphs, cuticle, algae, dinoflagellates and AOM. A high proportion of black wood and low diversity of components point to an origin related to turbidity currents. Furthermore, results of the palynofacies analysis have allowed determining that, during the deposition of the CCPB sediments in the Polish Spisz area, the distance between the deposition area and the source area became relatively large. The biostratigraphic analysis of dinoflagellate cysts from the Podhale Basin (Szaflary, Zakopane, and lower Chochołów beds) indicates an Early Rupelian age. Moreover, kerogen analysis in the UV was applied for the first time to study the CCPB succession. As a result, reworking was documented, so far unrecognized by other methods, and the mutual verification of the obtained results was possible.
    Źródło:
    Geological Quarterly; 2017, 61, 4; 859--876
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratigraphical and ecological significance of Early Eocene radiolarians from the Subsilesian Series, Polish Flysch Carpathians
    Znaczenie stratygraficzne i ekologiczne wczesnoeoceńskich radiolarii z serii podśląskiej, polskie Karpaty fliszowe
    Autorzy:
    Bąk, M.
    Barwicz-Piskorz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/191992.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    radiolaria
    biostratigraphy
    EECO
    lower Eocene
    Carpathians
    Opis:
    Variegated shales in the Early Eocene hemipelagic deposits of the Subsilesian series, Polish part of the Western Carpathians, have yielded rich siliceous microfossils comprising abundant radiolarians and rare diatoms. Forty-three radiolarian taxa have been recognised. One new radiolarian species, Amphisphaera subsilesianensis n. sp. was described. The assemblage represents the Phormocyrtis striata striata radiolarian Zone of the tropical oceans. The deposits investigated have also yielded abundant agglutinated foraminifera which correlate with the lower Eocene Saccamminoides carpathicus foraminiferal Zone. The radiolarian assemblage comprises a low content of taxa characterising cool, oligotrophic water masses which also occur in the upper Paleocene deposits of the Subsilesian series. Most part of the assemblage is represented by abundant radiolarian species characteristic of tropical domain, which may indicate the incursion of warm water masses into the Subsilesian Basin during the Early Eocene Climatic Optimum Period.
    Radiolarie eoceńskie z polskich Karpat fliszowych są stosunkowo słabo poznane. Istnieje tylko kilka prac dotyczących tych mikroskamieniałości z eocenu jednostki skolskiej (Bąk, 1995; Bąk et al., 1997; Rajchel et al., 1999). Prezentowany zespół radiolarii pochodzi z utworów dolnego eocenu jednostki podśląskiej, odsłaniających się w potoku Czerwin, w obrębie okna tektonicznego Wiśniowej (Fig. 1A, B). W odsłonięciu widoczne są utwory górnokredowych margli z Węglówki oraz paleogeńskich piaskowców z Czerwina, oraz zielonych i pstrych łupków (Fig. 2). Radiolarie zostały znalezione w zielonkawych łupkach ilastych należących do serii łupków pstrych, ponad pierwszą odsłaniającą się w profilu wkładką bentonitu (Fig. 1C). Badany zespół radiolarii obejmuje 43 gatunki należące do czterech rodzin z rzędu Nassellaria (Trissocyclidae, Arthostrobiidae, Pterocorythidae i Eucyrtidiidae) i do pięciu rodzin z rządu Spumellaria (Actinommidae, Phacodiscidae, Sponguridae, Spongodiscidae i Porodiscidae) (Figs 3-6). Wyróżniono także nowy gatunek - Amphisphaera subsilesianensis n. sp. (Fig. 3G-I). Na podstawie obecności wielu charakterystycznych gatunków promienic jak: Calocycloma ampulla (Ehrenberg), Buryella clinata Foreman, Phormocyrtis striata striata Brandt, Lychnocanium bellum (Clark & Campbell), L. auxilla Foreman, L. babylonis (Clark & Campbell), Amphisphaera minor (Clark & Campbell), Amphisphaera coronata (Ehrenberg), badany zespół zaliczono do zony radiolariowej Phormocyrtis striata striata, wyróżnionej przez Riedel & Sanfilippo (1987) dla regionów tropikalnych. Współwystępowanie zespołów otwornic aglutynujących wraz z radiolariami umożliwiło korelację tego poziomu radiolariowego z poziomem otwornicowym Saccamminoides carpathicus (Geroch & Nowak, 1984). Opisany zespół radiolarii wskazuje wyraźnie na ingresję ciepłych wód powierzchniowych do basenu podśląskiego we wczesnym eocenie, w których mogły żyć gatunki tropikalne i subtropikalne. Podobne zespoły taksonów występują w utworach jednostki skolskiej należących do tych samych poziomów biostratygraficznych (Bąk et al., 1997). Może to wskazywać na zmianę termiki wód oceanicznych na skalę regionalną, która mogła być związana z wczesnoeoceńskim optimum klimatycznym.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2005, 75, No 2; 139-139
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geology of the volcano-sedimentary complex of the Kamyanyi Potik Unit on Chyvchyn Mount (Ukrainian Carpathians) : preliminary results
    Autorzy:
    Hnylko, O.
    Krobicki, M.
    Feldman-Olszewska, A.
    Iwańczuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059807.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    volcanic rocks
    pyroclastic flysch
    basaltic pillow lavas
    Carpathians
    Chyvchyn Mountains
    Kaminnyi Potik Unit
    Opis:
    The Kamyanyi (Kaminnyi) Potik Unit (Nappe) is the most internal and structurally-highest unit of the Fore-Marmarosh units, and in many places is directly covered by the Marmarosh Nappes of the Marmarosh Crystalline Massif. Chyvchyn Mount is built of this unit and forms a separate tectonic cap (Chyvchyn Mt. Klippe). It consists of the Upper Jurassic/lowermost Cretaceous Chyvchyn Formation, composed mainly of basic volcanic rocks, and the Tithonian-Early Cretaceous Kamyanyi Potik Formation, represented by calcareous and/or turbiditic deposits containing volcanic material. Geological mapping showed that this complex forms a tectonic klippe, which consists of four small tectonic thrust slices. Structurally, the lowermost one is represented by thin-bedded micritic limestones with cherts, and is interbedded with coarse/fine-grained calcareous pyroclastic turbidites (flysch). The second thrust slice is composed of calcareous-pyroclastic breccia with blocks of limestone, basalt, and chert (radiolarite?), which occur within a pyroclastic matrix and of coral limestones with basalt fragments and pyroclastic intercalations. The third thrust slice is constructed of breccia with a pyroclastic and volcanic matrix and clasts of effusive rocks and limestone. The fourth thrust slice – the highest – is represented by massive basaltic pillow lavas. Sedimentologically, the volcano-sedimentary complex represents a whole spectrum of marine mass-movement deposits, from debris flows through proximal turbidites to distal ones, which were formed during latest Jurassic/earliest Cretaceous time in the Outer Dacide-Severinide part of the Carpathian basins.
    Źródło:
    Geological Quarterly; 2015, 59, 1; 145--156
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentary conditions in the Siary zone of the Magura basin (Carpathians) in the late Eocene-early Oligocene
    Warunki sedymentacji w strefie Siar basenu magurskiego (Karpaty) w późnym eocenie-wczesnym oligocenie
    Autorzy:
    Leszczyński, S.
    Malata, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205216.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    flysch
    Carpathians
    Magura thrust
    Siary zone
    Priabonian
    Rupelian
    sedimentation
    Opis:
    The sediments of the upper Eocene (Priabonian)-lower Oligocene (Rupelian) of the Siary zone in the Magura nappe (basically Magura Beds in glauconitic facies) display features indicating their origination in sedimentary conditions quite different from those in which coeval sediments from the other parts of the Carpathians were deposited. This paper aims at interpreting the sedimentary conditions on the basis of lithofacies, their vertical and lateral distribution, foraminifera assemblages, CaCO3 and organic matter content determined in six transects through the entire Siary zone, the contents of main and trace elements determined in 11 samples from one section and different published data. Lithofacies and the present day shape of the Siary zone suggest sedimentation of the entire succession in a strongly elongated confined basin. Facies distribution indicates deposition on a submarine ramp that gradually expanded to NE and E along the slopes of the outer basin margin. Assemblages of foraminifera suggest location of the basin bottom below the foraminiferal lysocline. Moreover, foraminifera together with bioturbation structures and sediment geochemistry indicate sedimentation mainly in weakly oxic, close to dysoxic bottom waters. The differences in facies in relation to the coeval deposits of the other parts of the Carpathians are interpreted as resulting mainly from intense resedimentation in the Siary zone during the Priabonian-Rupelian, and in part from the relatively low calcium carbonate supply. Gradual expansion of resedimentation towards NE, followed by a decrease in the supply of coarse-grained material is regarded as due to lithosphere rollback beneath the evolving Carpathians. This process is interpreted as of superior significance in controlling se--Rupelian not only in the Siary zone but also in the entire Magura basin. This was the factor responsible for forcing the subsidence of the Magura basin, accretionary wedge development in its inner part, and fore-bulging of the area at some distance in front of the zone of the rolling back lithosphere, i.e. in the source area of the sedimentary succession in question. Finally, this process also caused drowning and burying of the source area.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2002, 72, No 3; 201-239
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New interpretation of the provenance of crystalline material from Oligocene flysch deposits of the Skole Nappe, Poland: evidence from heavy minerals and clasts in the Nowy Borek section
    Autorzy:
    Salata, Dorota
    Uchman, Alfred
    Powiązania:
    https://bibliotekanauki.pl/articles/94293.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    detrital material
    provenance
    Futoma Member
    Carpathians
    materiał detrytyczny
    pochodzenie
    Futoma
    Karpaty
    Opis:
    The Futoma Member (Oligocene, Rupelian) of the Menilite Formation is present only in the northern part of the Skole Nappe. Some diatomitic layers of this member in the Nowy Borek section contain coarse-grained detrital material composed of a variety of metamorphic, volcanic and sedimentary rock fragments. The material derives from primary and secondary sources. Most abundant are debris of metamorphic rocks, mostly gneisses and mica schists. The metamorphic origin of these rocks is confirmed by the composition of heavy mineral assemblages and garnet chemistry. These rocks could have been transported from a local source located close to the margin of the Skole Basin or within that basin. The volcanic rocks reflect Paleogene volcanic activity that was widespread in the Carpathian region. Cherts, which could have been subjected to synsedimentary erosion, may have been derived from the older portions of the same formation.
    Źródło:
    Geologos; 2019, 25, 2; 163-174
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Maastrichtian foraminiferids and diatoms from the Polish Carpathians (Ropianka Formation, Skole Nappe): a case study from the Chmielnik-Grabówka composite section
    Autorzy:
    Gasiński, M. A.
    Olshtynska, A.
    Uchman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/138777.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Carpathians
    Skole Nappe
    Cretaceous
    microfossils
    plankton
    foraminiferids
    diatoms
    flysch
    Karpaty
    płaszczowina skolska
    kreda
    mikroskamieniałości
    okrzemki
    flisz
    Opis:
    Well-preserved foraminiferids have been found in the Chmielnik-Grabówka section (Skole Nappe, Polish Carpathians). The Abathomphalus mayaroensis (late Maastrichtian) and Racemiguembelina fructicosa (earlylate Maastrichtian) standard planktonic foraminiferal biozones have been recognized, based on the occurrence of their respective index species. Sediments of the R. fructicosa Zone contain diatoms, which are a rare component of Cretaceous flysch microfossil assemblages in the Carpathians. The diatom frustules and some foraminiferid tests are pyritized, probably after burial in the sediment, below the redox boundary or in the oxygen-deficient microenvironment inside the frustules or tests of microfossils; the presence of trace fossils and bioturbational structures in the same bed indicate an oxygenated sea floor.
    Źródło:
    Acta Geologica Polonica; 2013, 63, 4; 515-525
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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