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Wyszukujesz frazę "flysch Carpathians" wg kryterium: Temat


Tytuł:
Dendrogeomorphological analysis of landslide activity along the planned S-69 road in the Węgierska Górka municipality (Beskid Śląski Mountains, S Poland)
Autorzy:
Wiktorowski, D.
Krąpiec, M.
Lutka, M.
Powiązania:
https://bibliotekanauki.pl/articles/955175.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
landslides
dendrogeomorphology
Beskid Śląski
Polish flysch Carpathians
Opis:
Our dendrogeomorphological analysis was completed for 4 landslides, situated in the municipality of Węgierska Górka in the Beskid Śląski Mountains in Southern Poland. The local landslides pose a direct threat to the newly designed S-69 expressway running through the north-western part of the municipality. The research material consisted of 127 samples, collected with the use of a Pressler increment borer, from three species of coniferous trees (Norway spruce, Scots pine, and Silver fir). The landslide activity periods were identified on the basis of the splitting of the dendrochronological curves representing the upslope and downslope parts of the tree trunks. The largest number of the studied trees indicated reactions to substrate mass movements in 1964, 1971, 1972, 1984, 1994, 1997, 1998, and 2010. The detailed locations of the sampled trees allowed us to reconstruct the activities of particular landslide sections in time. We identified the fact that parts of the landslides located downslope of the planned road S-69 are more active than parts of the same landslides located above it on the slope. Geological conditions in the studied area favour landslide activity while precipitation is the main triggering factor of landslides.
Źródło:
Geology, Geophysics and Environment; 2017, 43, 2; 139-149
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two ammonites from the Early Cretaceous deep-sea sediments of the Silesian Nappe, Polish Carpathians, and stratigraphic problems resulted from micropalaeontological dating of their sites
Autorzy:
Vašíček, Z.
Gedl, E.
Kędzierski, M.
Uchman, A.
Powiązania:
https://bibliotekanauki.pl/articles/191914.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
ammonites
nannoplankton
dinocysts
biostratigraphy
Lower Cretaceous
flysch Carpathians
Opis:
Two ammonites Teschenites subflucticulus Reboulet and Criosarasinella mandovi Thieuloy have been found for the first time in the Flysch Carpathians. They occur in the so far poorly dated Early Cretaceous flysch deposits of the Silesian Nappe at Poznachowice Dolne, in the Upper Cieszyn Shale and the Hradiště (Grodziszcze) beds lithotypes, respectively. Teschenites subflucticulus points to Late Valanginian (Furcillata Zone), but nanno- plankton points to Late Hauterivian-Late Barremian and dinocysts to Late Hauterivian, all analyzed from the same sample. Criosarasinella mandovi points also to Late Valanginian (Furcillata Zone), what is not in contra-diction with the nannoplankton assemblage (Early Valanginian-Early Barremian) analyzed from the same bed, but dinocysts suggest Late Hauterivian. Preservation of the ammonites and sedimentary features of their host beds exclude redeposition. The difference in age by almost 3 Ma years between the ammonites and microfossils cannot be satisfactorily explained according to the current knowledge on their biostratigraphic meaning; it is left as it is as a dilemma.
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 1; 25-37
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peculiar calcite speleothems filling fissures in calcareous sandstones and their palaeohydrological and palaeoclimatic significance: an example from the Polish Carpathians
Autorzy:
Gradziński, M.
Duliński, M.
Hercman, H.
Górny, A.
Przybyszowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2060492.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
flysch Carpathians
Pleistocene
Holocene
speleothems
stable isotopes
ascending water
Opis:
Peculiar calcite speleothems developed in fissures in the Cergowa Sandstones were found in the Klęczany Quarry (Polish Western Carpathians). They represent flowstone and stalactites, rafts and various sparry crusts. Such speleothems, especially phreatic ones, are uncommon in the Outer Carpathians that are composed mainly of siliciclastic rocks of flysch type, with only limited calcium carbonate content. The speleothems analysed grew in vadose and phreatic conditions as well as at the air-water interface. Phreatic speleothems and thin rafts comprise calcite crystals of eccentric morphology. Based on their stable isotope composition the majority of the speleothems form two clusters. The first is characterized by d18O values between –9.8 and –8.5‰ and of d13C values between –5.7 and –0.6‰ whereas the second cluster of samples yields d18O values between –9.4 and –7.3‰ and d13C values from –11.5 to –9.7‰. Speleothems grew between 230+14–13 ka and Holocene time. Phreatic speleothems, including massive rafts, precipitated from ascending water of deep circulation whereas vadose and water table speleothems crystallized from local infiltration water charged with soil CO2. Mixing of both waters in the shallow phreatic zone is plausible.
Źródło:
Geological Quarterly; 2012, 56, 4; 711--732
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural control on the initiation and development of the Biała Wisełka Landslide Complex (Silesian Beskid, Outer Carpathians, Southern Poland)
Autorzy:
Sikora, R.
Powiązania:
https://bibliotekanauki.pl/articles/184722.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
landslides
structural geology
lineaments analysis
LiDAR
Silesian Nappe
flysch Carpathians
Opis:
The numerous landslides which have developed in the mostly Cretaceous to Eocene turbiditic rocks of the Silesian Beskid are genetically and geometrically controlled by bedrock structural features, the Biała Wisełka Landslide Complex being no exception. Its location is in the headwater area of the Wisła River, on the slopes of Mt. Barania Góra (1220 m a.s.l.). The bedrock is represented by flysch strata of the Silesian Nappe (Outer Carpathian Fold-and-Thrust Belt), or, more specifically, the Upper Cretaceous turbiditic Upper Godula and Lower Istebna Beds of the Godula Thrust Sheet. The research work consisted in their mapping and structural analysis, facilitated by the use of a high-resolution digital elevation model based on LiDAR data. A comparative analysis enabled the determination of the relationships between landslides and the bedrock structure. The study results point to significant roles being played by the joint network, fault systems, the structural arrangement and the lithology of rock strata in the initiation and evolution of the studied landslide complex. An additional result of the methods applied methods was the identification and characterization of previously unknown fault zones in the study area.
Źródło:
Geology, Geophysics and Environment; 2018, 44, 1; 31-48
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dated landslides in the Gorce Mts. (Polish Outer Carpathians) : preliminary results
Autorzy:
Buczek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2058625.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
radiocarbon datings
landslide fen
mass movement activity
Holocene
Flysch Carpathians
Opis:
Preliminary results of dating landslides in the Gorce Mts. (Polish Outer Carpathians) are given, where ages of landslide activity have been poorly constrained. Four landslide zones with minerogenic mires (fens) were selected in order to determine the age of landslide movements, with depositional sequences of six fens being investigated by boreholes. Conventional radiocarbon dating of wood samples from mineral sediments sealing the landslide depressions was carried out to establish the age of landslide formation or rejuvenation. Loss on ignition analyses were obtained at 2.5 cm intervals along the cores to indicate possible delivery of allochthonous material into the peat bogs. Landslide formation in the Gorce Mts. corresponds to phases of mass movement hitherto identified in the Polish Outer Carpathians. Increased mass movements activity in the Gorce Mts. relate to cold and humid periods of the Holocene which occurred: ~11.1 ka cal BP, 8.6-8.0 cal BP; 6.5-5.9 ka cal BP, 4.8-4.5 cal BP, 3.3-2.5 cal BP and 1.75-1.35 cal BP. Loss on ignition analyses revealed changes in sedimentation in the landslide mires such as formation of mineral and illuvial horizons in peat sequences, and mineral covers overlying fens, associated with humid climatic phases of the Holocene.
Źródło:
Geological Quarterly; 2019, 63, 4; 849--860
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the origin of chloride waters in the Polish Flysch Carpathians
Autorzy:
Zuber, A.
Chowaniec, J.
Borowiec, M.
Powiązania:
https://bibliotekanauki.pl/articles/2062987.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chloride waters
ultrafiltration
diagenetic waters
oil-field waters
catagenesis
flysch Carpathians
Opis:
Chloride waters in the Polish Flysch Carpathians are remnants of marine sedimentation water which was chemically and isotopically changed due to ultrafiltration and the release of dehydration water (diagenetic water) during the burial diagenesis of clay minerals. In the western part of the study area, the diagenetic end-member is characterized by δ18O and δ2H values of about +6.5 and –30.0‰, respectively, and Cl– content in the range of 3.8 and 13.8 g/dm3. In some fault areas, such waters migrate to the surface and mix with local meteoric waters as indicated by mixing lines in δ18O–δ2H and δ18O–Cl– graphs. In several wells of the eastern part, waters containing a significant proportion of marine water occur. However, in majority of deep wells, mixtures of diagenetic and meteoric waters of Quaternary and pre-Quaternary climates are present, as deduced from δ18O–Cl– linear relations. In most cases, they do not exhibit linear relations also expected in δ18O–δ2H graphs due to the shifts of δ2H to heavier isotopic values supposedly caused by involvement of water in the generation of hydrocarbons.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 441 Hydrogeologia z. 10; 201--208
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geotourism during excursions in the northeastern part of The Gorce National Park
Geoturystyka podczas spaceru w północno-wschodniej części Gorczańskiego Parku Narodowego
Autorzy:
Barmuta, M.
Powiązania:
https://bibliotekanauki.pl/articles/905901.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
geomorfologia
Karpaty fliszowe
Gorce
geoturystyka
Gorce Mountains
flysch Carpathians
geotourism
geomorhology
Opis:
The Gorce Mountains National Park is located on the southern part of the Małopolska Province in Poland. Despite the lack of spectacular geological attractions it is a very good site to promote Earth Sciences knowledge and especially to educate in geology. The example of the on-day excursion going along the touristic trails within The Gorce Mountains National Park is being described in the presented paper. The author described great diversity of the geological and geomorphological elements, presenting educational values.
Gorczański Park Narodowy znajduje się w południowej części Małopolski. Mimo braku spektakularnych atrakcji geologicznych jest bardzo dobrym miejscem do promowania wiedzy z zakresu nauk o ziemi, a w szczególności geologii. W poniższym artykule opisano przykład jednodniowej wycieczki, przebiegającej wzdłuż szlaków Gorczańskiego Parku Narodowego, w której wykazano dużą różnorodność elementów geologicznych i geomorfologicznych.
Źródło:
Geotourism / Geoturystyka; 2011, 3-4; 51-62
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The structural control of the Mroczna Cave development on the slopes of Mt Kornuty (the Flysch Carpathians, Beskid Niski Mts)
Autorzy:
Zatorski, M.
Powiązania:
https://bibliotekanauki.pl/articles/295108.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
mass movements
flysch Carpathians
crevice-type cave
structural control
anisotropic rock massif
Opis:
The Mroczna Cave is one of the longest caves in the Beskid Niski Mts., located on the south-western slopes of Mt Kornuty, along the main scarp of the landslide. According to the geomechanical criterion, it is dilation cave, where extension has played a major role. Morphotectonic analysis indicates that the main gravitational movement was of a toppling nature but there were also rotation around the vertical axis as well as a backward rotation. The relatively large cave depth (15.5 m) and its shape (cross-section of its passages) indicate that it was formed along a new gravitational cutting surface of the rock massif, associated with joint sets.
Źródło:
Landform Analysis; 2014, 27; 55-65
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dendrogeomorphological analysis of the Sawicki Landslide in the Beskid Niski Mountains (S Poland)
Autorzy:
Krąpiec, Marek
Nawrocka, Natalia
Margielewski, Włodzimierz
Szychowska-Krąpiec, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/2058623.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
dendrogeomorphological analysis
complementary method
complex-type landslide
Polish Flysch Carpathians
southern Poland
Opis:
We applied dendrochronological analysis to study an extensive (~2.5 km long) complex-type landslide in the Beskid Niski Mountains (Polish Flysch Carpathians), which was rejuvenated in historical time (the earliest transformation occurred in 1913). We used three complementary methods (dating of eccentricity of annual growth rings, eccentricity indices, and analysis of reaction wood), based on seven species of deciduous and coniferous trees. A total of 204 trees were sampled and 408 cores collected using a Pressler increment borer. Based on the dendrochronological analysis, the activity of various parts of the landslide in the past century is presented, which appears to have been diverse and influenced mostly by precipitation. The upper part of the landslide was active from the 1920s until the 1940s. In the middle section of the landslide, intensifications of gravitational movement were repeatedly recorded after intense rainfalls throughout the entirety of the last century. The highest landslide activity was dendrochronologically detected in the 1980s and 1990s. Increasing landslide activity during so-called “dry years” may have been related to quick drying of the bedrock, resulting in changes in rock strength parameters. Our results indicate significant susceptibility of this particular slope-valley geosystem in response to even slight hydrogeological changes (including dryness), which can trigger ground movement.
Źródło:
Geological Quarterly; 2019, 63, 4; 801--810
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rainfall thresholds for the occurrence of shallow landslides determined for slopes in the Nowy Wiśnicz Foothills (Polish Flysch Carpathians)
Autorzy:
Demczuk, Piotr
Zydroń, Tymoteusz
Siłuch, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2058628.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
landslide
slope stability
rainfall threshold
VADOSE/W
SLOPE/W
Polish Flysch Carpathians
Opis:
Values of rainfall thresholds on selected shallow landslide slopes (Dział, Gwoździec) located in the Nowy Wiśnicz Foothills are determined using a physically-based slope stability model considering a long-term period of analysis (GeoSlope Inc. software). Slope stability analysis included determination of the impact of rainfall on changes of stress state within the soil substrate and their influence on estimation of mass movement risk. The slope stability calculation results have shown that the rainfall threshold values are a function of many variables, primarily the hydraulic properties of soil and rock substratum, temporal distribution of precipitation, and soil moisture content conditions in the period proceeding rainfall. The results of the calculations indicate that, in extreme cases, accumulated rainfall threshold values for the same slope can range from ~100 to 500 mm. Estimated rainfall threshold values were lower than those values reported in the literature for the Polish Carpathians, but are similar to those determined by Guzetti et al. (2007) for Central and Southern Europe.
Źródło:
Geological Quarterly; 2019, 63, 4; 822--838
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical characteristics, thermal maturity and source rock potential of the Oligocene Šitbořice Member of the Menilite Formation in the Ždánice Unit (Czech Republic)
Autorzy:
Jirman, P.
Geršlová, E.
Pupp, M.
Bubík, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060076.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Šitbořice Member
Menilite Formation
Outer Flysch Carpathians
source rock potential
thermal maturity
organic petrography
Opis:
Rocks deposited in the Oligocene Paratethys are recognized as one of the most important source rocks in the Flysch Carpathians. The Šitbořice Member (uppermost NP23 to lowermost NP25 zone) represents the upper part of the Menilite Formation in the Outer Flysch Carpathians of the Czech Republic. This paper presents results of bulk geochemical analysis, Rock-Eval pyrolysis and organic petrography. The geochemical evaluation, source rock potential, kerogen type and thermal maturity were studied using borehole cores. Based on the classification of Peters (1986), the evaluated Šitbořice Member is mostly classified as a “very good” source rock according to TOC and variable, mostly “poor” to “good” according to the petroleum potential. However, the average petroleum potential value assigned the member to “good” source rock which is in accordance with the TOC classification if the “live” TOC is used. A comparable distribution between kerogen type II and III has been indicated by HI. Unlike this, the organic petrography observations show the organic matter belongs to the kerogen type II which corresponds to the relationship of residual hydrocarbon potential versus TOC and HI calculated based on “live” organic carbon. Presumed immaturity was confirmed by Rr and Rock-Eval Tmax. Oxygen-restricted conditions ora dysoxic environment have been indicated by the TOC/TS ratio.
Źródło:
Geological Quarterly; 2018, 62, 4; 858--872
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lithostratigraphy and biostratigraphy of the Upper Albian-Lower/Middle Eocene flysch deposits in the Bystrica and Rača subunits of the Magura Nappe (Beskid Wyspowy and Gorce Ranges; Poland)
Lito- i biostratygrafia utworów fliszowych górnego albu-dolnego/środkowego eocenu w jednostce bystrzyckiej i raczańskiej płaszczowiny magurskiej w Beskidzie Wyspowym i Gorcach (Zachodnie Karpaty fliszowe)
Autorzy:
Oszczypko, N.
Malata, E.
Bąk, K.
Kędzierski, M.
Oszczypko-Clowes, M.
Powiązania:
https://bibliotekanauki.pl/articles/191454.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
lithostratigraphy
biostratigraphy
deep-water agglutinated foraminifera
calcareous nannoplankton
Early Cretaceous–Palaeogene
Magura Nappe
Western Flysch Carpathians
Opis:
LithostratigraphyandbiostratigraphyoftheBystricaandRaèasubunitsoftheMaguraNappehavebeen studied in the southern part of the Beskid Wyspowy Range and on the northern slopes of the Gorce Range (Polish part of the Western Flysch Carpathians). Six new lithostratigraphic units (Jasień Formation, Białe Formation, Jaworzynka Formation, Szczawina Sandstone Formation, Krzysztonów Member, and Ropianka Formation) of the UpperAlbian–Palaeocene age have been established, and five other units (Malinowa Shale Formation, Hałuszowa Formation, Łabowa Shale Formation, Beloveza Formation, Bystrica Formation) have been additionally described. The newly created formations as well as the Malinowa Shale Formation and the Hałuszowa Formation have been included to a new Mogielica Group of units (Upper Albian–Palaeocene). This group of units passes upwards into the Beskid Group (Eocene–Oligocene).The Mogielica Group, spanning over 40 myrs, represents the turbidite depositional system, separated by highstand variegated clays which can be correlated with minor sequences in terms of sequence stratigraphy. The following biostratigraphic zones have been recognised in the Cretaceous–Lower/Middle Eocene deposits: Plectorecurvoides alternans, Bulbobaculites problematicus, Uvigerinammina jankoi, U. jankoi-C. gigantea, Caudammina gigantea, Remesella varians, Rzehakina fisistomata, Glomospira div. sp., and Saccamminoides carpathicus. A few lithostratigraphic units consisting of calcareous sediments have been correlated with the standard calcareous nannoplankton zonation and the chronostratigraphy.
Płaszczowina magurska, największa jednostka tektoniczna zewnętrznych Karpat Zachodnich (Fig. 1), jest całkowicie odkorzeniona od swego podłoża. Utwory serii magurskiej starsze od turonu znane są jedynie z jednostki Grajcarka (sukcesja magurska pienińskiego pasa skałkowego), wiercenia Obidowa IG-1 oraz z kilku niewielkich odsłonięć przy południowym obrzeżeniu okna tektonicznego Mszany Dolnej (Fig. 2, por. Birkenmajer & Oszczypko, 1989). W jednostce Grajcarka, ponad głębokowodnymi utworami jury górnej i neokomu, występuje “czarny flisz” formacji wronińskiej (alb-cenoman) oraz zielone łupki radiolariowe cenomanu (formacja hulińska) (Birkenmajer, 1977, por. Oszczypko et al., 2004). Szaro-zielone łupki plamiste albu-cenomanu, znane z południowego obrzeżenia okna tektonicznego Mszany Dolnej, zdefiniowane zostały w pracy jako formacja łupków z Jasienia. Formacja ta, o miąższości niemniejszej od kilkunastu metrów, zazębia się w stropie z łupkami czerwonymi formacji z Malinowej. W Beskidzie Wyspowym i Gorcach ponad łupkami pstrymi formacji z Malinowej (turon-santon/kampan) oraz poniżej łupków pstrych formacji z Łabowej (eocen dolny i środkowy) występują zróżnicowane facjalnie osady fliszowe, zaliczane dotychczas do różnych nieformalnych jednostek litostratygraficznych, takich jak: warstwy z Kaniny, piaskowce ze Szczawiny (strefa bystrzyck i raczańska) oraz warstwy z Jaworzynki (strefa raczańka i strefa Siar). Najwyższą pozycję stratygraficzną zajmują utwory tradycyjnie nazywane “warstwami inoceramowymi” lub ropianieckimi. Na podstawie szczegółowych badań lito- i biostratygraficznych wyżej wymienionych utworów kredy górnej i paleocenu, zaproponowano cztery nowe formalne jednostki litostratygraficzne w randze formacji: formację z Białego (dotychczasowe warstwy z Kaniny), formację piaskowców ze Szczawiny (dotychczasowe piaskowce ze Szczawiny), formację z Jaworzynki (dotychczasowe warstwy z Jaworzynki) oraz formację ropianiecką (dotychczasowe warstwy ropianieckie). Ponadto badano pięć innych górnokredowo-eoceńskich formacji: łupków z Malinowej, z Hałuszowej, łupków z Łabowej, beloweskiej i bystrzyckiej, które dodatkowo opisano. Wszystkie nowo zdefiniowane formacje oraz formacje: łupków z Malinowej oraz z Hałuszowej, włączono do nowo wydzielonej grupy Mogielicy (górny alb-paleocen). Grupa ta przechodzi w stropie w grupę beskidzką (eocen-oligocen) opisaną przez Bir- kenmajera & Oszczypkę (1989). Grupa Mogielicy, obejmująca okres czasowy liczący ponad 40 mln lat, reprezentowana jest przez turbidytowy system depozycyjny, ograniczony w stropie i spągu przez osady łupków pstrych, związanych z okresem wysokiego względnego poziomu morza. Wśród zespołów mikrofauny otwornicowej albu - dolnego/ środkowego eocenu, znalezionych w badanych utworach płaszczowiny magurskiej, rozpoznano większość poziomów biostratygraficznych opracowanych dla polskich Karpat zewnętrznych przez Gerocha & Nowaka (1984) oraz przez Olszewską (1997). Do tego schematu włączono również poziomy charakterystyczne dla utworów płaszczowiny magurskiej. Poziom Plectorecurvoides alternans (poziom interwałowy IZ) Definicja: dolna granica - pojawienie się gatunku Plectorecurvoides alternans Noth (w badanym materiale dolna granica nie jest uchwycona, odpowiada początkowi profilu sukcesji magurskiej), górna granica - pojawienie się Bulbobaculites problematicus (Neagu);
Źródło:
Annales Societatis Geologorum Poloniae; 2005, 75, 1; 27-69
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Cretaceous - Early Palaeogene sandy-to-gravelly debris flows and their sediments in the Silesian Basin of the Alpine Tethys (Western Outer Carpathians, Istebna Formation)
Autorzy:
Strzeboński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059835.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
flysch Carpathians
Silesian Nappe
Istebna Formation
deep-water sedimentary environment
sediment gravity flows
debris flows
siliciclastic deposits
debrites
depositional system
apron
Opis:
The study focuses on Upper Cretaceous - Palaeocene deposits from the Beskid Śląski mountain range in southern Poland constituting the Istebna Beds. The Istebna Beds, also referred to as the Istebna Formation, are part of the Silesian tectonic unit, which forms the Outer Carpathian fold-and-thrust belt (part of the Alpine-Carpathian system). The results of qualitative and quantitative lithological-sedimentological studies were the basis for the interpretation of lithofacies types, sedimentary processes and palaeoenvironment as well as for the reconstruction of the architecture of the depositional system. The analysis conducted on the basis of field description of the deposits shows the prevalence (nearly 70%) of siliciclastic strata representing a sandstone-conglomerate association (S-C), which is the main subject of this work. The S-C lithofacies: sandstones, gravelly sandstones, sandy conglomerates and conglomerates constitute the deposits formed mostly by mass gravity-flows such as sandy-to-gravelly debris flows. The distribution of the coarse-clastic material indicates a sediment supply from southerly directions and implies the presence of an active source area in the rear part of the Silesian Basin. A succession of the sandstone-to-conglomerate deposits with the secondary participation of other lithofacies, with a thickness of approximately two thousand metres, indicates temporary increased diastrophic activity in the Silesian Ridge (source area) and the intense denudation of this area. The uplift of the alimentation area and its destruction coinciding with enforced relative regression and the uncovering of the proximal depositional zone of the basin led to resedimentation of the older intrabasinal material and repeated mass deposition together with delivery of extraclasts of pre-existing rocks and minerals. The lithofacies development of the sandstone-to-conglomerate debrites and the related sedimentary palaeotransport directions suggest an accumulation domain in the form of a linear apron depositional system developed in a deep-water setting. Experimental modelling of subaqueous sandy flows has contributed to a better understanding of the complex genesis of deep-water sediment gravity flows developing in depositional systems rich in sand material.
Źródło:
Geological Quarterly; 2015, 59, 1; 195--214
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Type locality of the Mutne Sandstone Member of the Jaworzynka Formation, Western Outer Carpathians
Locus typicus ogniwa piaskowców z mutnego formacji z Jaworzynki w polskich Karpatach zewnętrznych
Autorzy:
Cieszkowski, M.
Golonka, J.
Waśkowska-Oliwa, A.
Chodyń, R.
Powiązania:
https://bibliotekanauki.pl/articles/191712.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Mutne Sandstone Member - a new formal lithostratigraphic unit
Jaworzynka Formation
lithostratigraphy
biostratigraphy
deep-water agglutinated foraminifera
Cretaceous-Palaeocene
Magura Nappe
Western Flysch Carpathians
Opis:
The Mutne Sandstone Member occurs within the Jaworzynka Formation of the Magura Nappe depo- sits, typical for the western marginal Siary subunit. In the area north of Jeleśnia it is represented by the thick sand- stone complex. Typical and complete profile of this division is located in Mutne village next to Jeleśnia, on the slope of Janikowa Grapa Mt. This locality represents the type section for the Mutne Sandstone Member, while three others: Jaworzynka, Rychwałdek and Kuków-Rzyczki serve as reference sections. The age of the Mutne Sandstone Member was determined as Maastrichtian-Palaeocene; but only Maastrichtian is documented by foraminiferal assemblages. The Palaeocene age comes however from the superposition of this lithosom within the Magura Nappe profile. The Campanian/Maastrichtian-Palaeocene complex of Siary Subunit deposits provides the perfect example for application of supersequences to the Western Flysch Carpathian basin. It fits the Upper Zuni IV supersequence and global time slice. The Mutne type locality is also a prime geotourist attraction and object of inanimated nature proposed for protection.
Źródło:
Annales Societatis Geologorum Poloniae; 2007, 77, No 3; 269-290
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
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

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