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    Wyświetlanie 1-15 z 15
    Tytuł:
    Early Visean bryozoans from the Shishtu II Member, Shishtu Formation, central Iran
    Autorzy:
    Tolokonnikova, Zoya
    Yazdi-Moghadam, Mohsen
    Powiązania:
    https://bibliotekanauki.pl/articles/94713.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Bryozoa
    Visean
    Iran
    mszywioły
    Wizen
    Opis:
    Four bryozoan species are described from the upper member (Shishtu II) (Visean, Early Carboniferous=Mississippian) of the Shishtu Formation of central Iran: Nikiforovella ulbensis Nekhoroshev, 1956, Nicklesopora elegantulaformis (Nekhoroshev, 1956), Primorella cf. iranica Gorjunova, 2006, and Nikiforopora intermedia (Nikiforova, 1950). This Visean assemblage shows close palaeogeographical affinities of Iran with Kazakhstan and Russia (eastern Transbaikalia, Kurgan region).
    Źródło:
    Geologos; 2013, 19, 4; 291-299
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palynostratigraphy of the Mississippian Łobżonka Formation of Western Pomerania (NW Poland)
    Autorzy:
    Turnau, E.
    Trzepierczyńska, A.
    Protas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059556.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Pomerania
    Tournaisian
    Viséan
    palynostratigraphy
    Opis:
    Miospore assemblages from the Łobżonka Formation from three boreholes situated in the Laska–Czaplinek zone in Western Pomerania represent the lower part of the Lycospora pusilla (Pu) Biozone established for that area. An assemblage from one sample may represent this zone or the preceding Prolycospora claytonii (Cl) Biozone. This indicates that the sequences investigated may be attributed to the lower Viséan, and that the lower part of one of these may represent the uppermost Tournaisian. It is suggested that the part of the Łobżonka Formation studied is the lateral equivalent of the lower (but not the lowermost) part of the Drzewiany Formation of the Koszalin–Wierzchowo zone.
    Źródło:
    Geological Quarterly; 2005, 49, 1; 93--98
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First Paleozoic Zoophycos trace fossils from the Sudetes (the Bardo Unit)
    Autorzy:
    Muszer, J.
    Haydukiewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059078.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Sudetes
    Upper Visean
    trace fossils
    Zoophycos
    Opis:
    The trace fossil Zoophycos has been first time recognized in the Sudetes within the lower Carboniferous (upper Visean, crenistria Zone) of the Paprotnia Beds in the Bardo Unit. A distinct concentration of Zoophycos occurs in the lower part of the Paprotnia profile, in mudstones interbedded with bentonites, which were most likely deposited between storm wave base and fair weather wave base, in oxygenated water.
    Źródło:
    Geological Quarterly; 2010, 54, 3; 381-384
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeoenvironmental reconstruction of the Upper Visean Paprotnia Beds (Bardo Unit, Polish Sudetes) using ichnological and palaeontological data
    Autorzy:
    Muszer, J.
    Uglik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060590.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    palaeoenvironment
    taphoceonoses
    trace fossils
    ichnoassociations
    Upper Visean
    Sudetes
    Opis:
    In this paper the trace fossil associations and the taphocoenoses from the Upper Visean Paprotnia Beds (Bardo Unit) have been compared. Eleven ichnogenera have been recognized (Zoophycos, Chondrites, Protovirgularia, Lockeia, Palaeophycus, Nereites, Planolites, Altichnus, Paleobuprestis, cf. Thalassinoides and ?daedaloid form). A new ichnospecies Paleobuprestis sudeticus has been defined herein. It is the oldest wood-boring trace fossil observed in macroscale and the first wood-boring trace fossil preserved on the archaeocalamites stems. Based on ichnodiversity and relative abundance of trace fossils in the investigated strata three ichnoassociations have been distinguished: Zoophycos–Chondrites–Palaeophycus, Palaeophycus–Nereites and Paleobuprestis. Vertical succession of both the taphocoenoses and ichnoassociations reflects the different colonization stages of the substrate and is linked to bathymetric changes in the marine basin from offshore to nearshore conditions in warm climate at low latitude. The Paprotnia profile is a unique record of the Asbian–Brigantian transition.
    Źródło:
    Geological Quarterly; 2013, 57, 3; 365--384
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palynology of the upper Visean Paprotnia Beds (Bardo Unit, Polish Sudetes)
    Autorzy:
    Górecka-Nowak, A.
    Muszer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059156.pdf
    Data publikacji:
    2011
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Polska
    Sudetes
    Upper Visean
    palynostratigraphy
    miospore colours
    palynofacies
    Opis:
    The siliciclastic rocks of the Paprotnia Beds from the Bardo Unit (Polish Sudetes) provide abundant and diverse palynological material. The miospore assemblages recovered allow distinction of two miospore biozones. The Tripartites vetustus–Rotaspora fracta (VF) Biozone was recognized in the lower and the middle parts of the section. In its upper part the Cingulizonates capistratus (Cc) Subbiozone, the lower part of the Cingulizonates capistratus–Bellispores nitidus (CN) Biozone was distinguished. These results indicate that the rocks of the Paprotnia section, considered earlier on the basis of biostratigraphic and radiometric data as upper Asbian, should be assigned to the upper Asbian and Brigantian. The location of the Asbian/Brigantian boundary and the possible occurrence of a gap in the Brigantian part of the section are discussed. Palynofacies observations of miospore preservation and frequency provided additional information, which confirm the gradual shallowing of the environment of deposition from offshore to onshore. Thermal maturity assessment of organic matter, based on miospore colour, indicates early mature and mature stages of organic matter thermal alteration.
    Źródło:
    Geological Quarterly; 2011, 55, 2; 165-180
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Visean pelagic chondrichthyans from northern Europe
    Autorzy:
    Ginter, M.
    Duffin, C.J.
    Dean, M.T.
    Korn, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/22095.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Late Visean
    pelagic fauna
    chondrichthyan
    tooth
    Carboniferous
    Europe
    Opis:
    The relatively rich assemblages of shark teeth from pelagic limestone (Mississippian, late Viséan, late Asbian-middle Brigantian) of three northern European regions: the Rhenish Mountains (Westenfeld Quarry, Germany), the Holy Cross Mountains (Todowa Grząba at the edge of Ostrówka Quarry, Poland), and Derbyshire (Cawdor Quarry, Matlock, England, UK) display certain similarities, with the absolute predominance of the teeth of Falcatidae (small Symmoriiformes) and the constant presence of Thrinacodus spp. The largest and most diverse assemblage from Todowa Grząba contains at least three species of a falcatid Denaea, a xenacanthimorph Bransonella nebraskensis, a newly described phoebodontid Thrinacodus dziki sp. nov., a few ctenacanthiform and euselachian teeth, and two abraded euchondrocephalan dental elements. Anachronistidae, common in the most of late Viséan pelagic faunas, are absent from Todowa Grząba and Westenfeld. The material under study differs from the shallow-water chondrichthyan fauna, hitherto described from the Mississippian carbonate platform facies, by its taxonomic content (particularly almost total absence of Euchondro-cephali), generally lower diversity, and higher frequency of small teeth.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alleged Caboniferous (Viséan) volcanism at the eastern margin of the Moravo-Silesian Basin, Kraków region, Southern Poland
    Autorzy:
    Lewandowska, A.
    Rospondek, M. J.
    Kobuszewski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/191619.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Viséan volcanism
    Culm
    rhyodacite
    breccias
    Zalas laccolith
    Opis:
    The volcanic rocks, represented by clasts in the breccias occurring within the Viséan Culm sequence at Głuchówki, previously were considered to provide evidence of the earliest record of Variscan volcanism on the eastern margin of Moravo-Silesian Basin in the Kraków area. The breccias have been described as the deposits of submarine slides, accompanying the Viséan volcanic activity. This paper provides evidence of a different mode of origin. The present study, based on new field observations, combined with petrological and geochemical data, showed that volcanic rocks are major framework constituents of a breccia and are accompanied by clasts of spotty hornfels and Culm mudstone. Some clasts originated in erosion of the nearby Permian Zalas rhyodacite laccolith and the spotty hornfelses of the contact aureole, while other clasts came from the Culm mudstones. The breccia framework components are not rounded and poorly rounded, which reflects their short distance of transport. Therefore, an alternative scenario for the genesis of the breccia is proposed. The breccias represent material deposited in erosional pockets formed along the bedding of the Culm mudstones. The red iron oxide shells around clasts may indicate weathering in a warm continental climate, thus constraining the breccia formation to either the Permian or the Early or Late Triassic. Thus, the only well documented Viséan igneous rock in the study area remains the diabase, known from the Klucze borehole. Conversely, no volcanic rocks of this age have been documented in the area under consideration.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2018, 88, 1; 59-69
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploring the limits of morphospace: ontogeny and ecology of Late Visean ammonoids from the Tafilalt, Morocco
    Autorzy:
    Klug, C.
    De Baets, K.
    Korn, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/22457.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleoecology
    morphospace
    ontogenesis
    ecology
    Late Visean
    ammonoid
    Ammonoidea
    Morocco
    Opis:
    Early late Viséan ammonoid assemblages in Morocco are composed of diverse and well-preserved specimens. The material was found in a plain in the Tafilalt (eastern Anti-Atlas). Here, we describe mass-occurrences of juvenile specimens, in which subadult and adult specimens occur in low numbers. The juveniles of some species display a conch morphology that differs fundamentally from the adult stages. Accordingly, we emend the species diagnoses of Goniatites lazarus as well as Calygirtyoceras darkaouaense, introduce the species Entogonites bucheri sp. nov., and discuss possible ecological implications of the morphologic changes throughout ontogeny. In particular, we compare the changes in conch morphology through ontogeny in the light of Pareto Optimiality according to which the morphology of organisms would fill a polygon or polyhedron in morphospace. Data points in one of the vorteces of the polyhedron indicate optimisation for the corresponding task. Although shape is not a proof of function, it appears plausible that juvenile conchs were selected rather for compactness while adult conchs were positively selected for conchs with improved hydrodynamic properties. This appears plausible because at small conch diameters, swimming movements will not suffice for effective translocation and a planktonic mode of life is likely.
    Źródło:
    Acta Palaeontologica Polonica; 2016, 61, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lower Carboniferous (Mississippian) stratigraphy of northwestern Poland: conodont, miospore and ostracod zones compared
    Stratygrafia dolnego karbonu (missisippian) Pomorza Zachodniego: porównanie zon konodontowych, miosporowych i małżoraczkowych
    Autorzy:
    Matyja, H.
    Turnau, E.
    Żbikowska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/191174.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Tournaisian
    Viséan
    biostratigraphy
    conodonts
    miospores
    ostracods
    Western Pomerania
    Opis:
    Detailed stratigraphy of the Tournaisian and Viséan in western Pomerania has been established on conodonts, miospores and ostracods recovered from 25 boreholes. Miospore associations from the Tournaisian and Viséan are assigned to nine biostratigraphic units (zones and subzones) erected earlier. Three successive benthic ostracod assemblages and two sub-assemblages are distinguished for the Tournaisian. The miospore zones/subzones and the ostracod assemblages/subassemblages are correlated with the Tournaisian sandbergi, Lower crenulata, isosticha-Upper crenulata, and typicus conodont zones. Stratigraphic gap has been demonstrated at the Devonian/Carboniferous boundary, using the results of both conodont and miospore studies. The Tournaisian/ Viséan boundary has been established approximately on the first appearance of the miospore species Lycospora pusilla Somers.
    Przedstawiono szczegółową stratygrafię turneju i wizenu Pomorza Zachodniego w oparciu o konodonty, miospory i małżoraczki. Materiał do badań biostratygraficznych pochodził z 25 otworów wiertniczych. Zespoły miospor z badanych utworów zaliczono do dziewięciu wcześniej wyróżnionych jednostek biostratygraficznych (zon i podzon). Dla turneju wyróżniono trzy kolejne zespoły i dwa podzespoły małżoraczków bentonicznych. Zony/podzony miosporowe i zespoły/podzespoły małżoraczkowe skorelowano z turnejskimi zonami konodontowymi sandbergi, dolna crenulata, isosticha-górna crenulata i typicus. Obecność luki stratygraficznej na granicy dewon/karbon udokumentowano na podstawie konodontów i miospor. Granica turnej/wizen została ustalona jedynie w przybliżeniu, na podstawie pierwszego pojawienia się gatunku miosporowego Lycospora pusilla Somers.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2000, 70, No. 3-4; 193-217
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new species of Lambdarina (Rhynchonellida, Brachiopoda) from the Viséan of central Sudetes (Poland) and its phylogenetic position
    Autorzy:
    Muszer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/139065.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Brachiopoda
    Rhynchonellida
    Lambdarinidae
    Viséan
    Sudetes
    palaeobiogeography
    ramienionogi
    wizen
    Sudety
    paleobiogeografia
    Opis:
    A new species of micromorphic articulate brachiopod (Rhynchonellida) Lambdarina jugowiensis sp. nov., from the upper Viséan (Sokolec Beds) of central Sudetes, SW Poland, is described. The studied specimens are calcified, what makes them unique in respect of their state of preservation. The material is represented by a full range of growth stages; from brephic to gerontic. Based on its morphological features and the palaeogeographical distribution of all its known species, two main evolutionary lines are proposed for the genus; the Australian and the European ones. Lambdarina was widely distributed in the equatorial-tropical waters of marginal seas of the Palaeotethys Ocean, mostly during Mississippian time.
    Źródło:
    Acta Geologica Polonica; 2014, 64, 1; 1-12
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    U-Pb zircon age of the Krásné Loučky tuffite : the dating of Visean flysch in the Moravo-Silesian Paleozoic Basin (Rhenohercynian Zone, Czech Republic)
    Autorzy:
    Jirásek, J.
    Wlosok, J.
    Sivek, M.
    Matýsek, D.
    Schmitz, M.
    Sýkorová, I.
    Vašíèek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060438.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    volcaniclastic sediment
    Horní Benešov Formation
    Variscan foreland
    Viséan
    Carboniferous
    chronostratigraphy
    Opis:
    The only previous U-Pb zircon date for the the Early Carboniferous flysch sequence of the Moravo-Silesian Paleozoic Basin was published in 1987 from tuffogenic material from Kobylí Quarry at Krásné Loučky near the town of Krnov (Silesia, Czech Republic). The measured age of 319 Ma did not agree with its stratigraphic position, and was used as the basis for a hypothesized block of Late Carboniferous paralic molasse incorporated during a later tectonic event. During a survey of the still active quarry in 2010, volcaniclastic horizons were identified and sampled. Direct correspondence of the tuff units to those sampled in 1987 cannot be proved but is likely. High precision chemical abrasion - thermal ionization mass spectrometry (CA-TIMS) U-Pb dating of zircon from this new material has yielded an age of 340.05 ± 0.22 Ma, which correlates to the previously inferred stratigraphic age of the locality and the current calibration of the Early Carboniferous geologic time scale. The newly established age corresponds to the Visean stage and dates the boundary between the Horní Benešov and Moravice formations that can be correlated with other foredeep basins of the Culm in the European Variscides. A population of detrital Cambro-Ordovician zircons and a single 2.0 Ga old zircon crystal from the same volcaniclastic layer dated by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) are consistent with the known age of source material in the Variscan orogenic front.
    Źródło:
    Geological Quarterly; 2014, 58, 4; 659--672
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Famennian, thermally altered chert exotic clasts from the Jędrzychowice/Ludwigsdorf wildflysch (Sudetes)-stratigraphic and tectonic implications
    Autorzy:
    Wajsprych, B.
    Haydukiewicz, J.
    Achramowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058928.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Western Sudetes
    Viséan wildflysch
    cherts
    exotic blocks
    Famennian conodonts
    thermal alteration
    tectonostratigraphy
    Opis:
    A wildflysch sequence recently recognized in the Görlitzer Schiefergebirge/western Kaczawskie Mts. boundary zone permits the characterization of the westernmost Kaczawa Unit as a chaotic complex. The cherts,many of which contain numerous radiolarians, occur as exotic clasts within the olistostrome deposits of the wildflysch. They are associated with allochthonous blocks of blueschist, andesite pillow lavas and pyroclastic rocks, flysch facies clastic rocks, mudstones (often of black shale lithology) and carbonates. The conodonts extracted from the grey-greenish radiolarite cherts indicate a mid-Famennian age (Early rhomboidea Zone to Early marginifera Zone). The conodont-bearing radiolarite clasts reveal no trace of a tectonometamorphic fabric. Their 4-4.5 conodont colour alteration index (CAI) indicates that the rock underwent low-temperature (250-285C) thermal alteration. The lack of thermal overprint in the olistostrome matrix allows this alteration to be interpreted as a part of the tectonothermal, post-mid-Famennian evolution of the source area. A number of the exotic blocks of unmetamorphosed volcanic rocks associated with the chert exotics seems to indicate igneous (volcanic) activity as the reason for the chert alteration. The fact that exotic blocks of the Devonian chert have been found as clasts within deposits earlier believed to represent Upper Proterozoic (Cadomian) flysch suggests the need for reassessement of the extent of Cadomian rocks in the westernmost Sudetes.
    Źródło:
    Geological Quarterly; 2006, 50, 2; 281-288
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Brachiopod fauna from uppermost Visean (Mississippian) mud mounds in Derbyshire, UK
    Autorzy:
    Carniti, A.P.
    Della Porta, G.
    Banks, V.J.
    Stephenson, M.H.
    Angiolini, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341371.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    brachiopod
    Brachiopoda
    fauna
    Visean
    Mississippian
    mud mound
    Derbyshire county
    Brigantian
    United Kingdom
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 4; 865-915
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The squamation of “Ctenacanthus” costellatus (Chondrichthyes: Ctenacanthiformes) from the Carboniferous of Lublin area, south-eastern Poland
    Autorzy:
    Ginter, Michał
    Skompski, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/138805.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ctenacanthiformes
    sharks
    dermal skeleton
    Viséan
    Lublin Coal Basin
    rekiny
    szkielet skórny
    wizen
    Lubelskie Zagłębie Węglowe
    Opis:
    A sample of late Viséan limestone from the Włodawa IG-4 borehole, east of Lublin, Poland, yielded a piece of a tooth and a few hundred well-preserved scales comparable to those of “Ctenacanthus” costellatus Traquair, 1884 from Glencartholm, Scotland, UK. Most of the scales are typical compound body scales of the ctenacanthid type. Their crowns are composed of several separate odontodes whose distal ends are turned backwards and bases are characterised by concave undersides. In the material, there are also sparse scales with similar crowns but with flat or convex bulbous bases, as well as ornamented plates and single, star-like denticles, probably from the head region. The taxonomic status of “Ctenacanthus” costellatus was analysed and a new generic name for that species, viz. Glencartius gen. nov., is proposed.
    Źródło:
    Acta Geologica Polonica; 2019, 69, 4; 571-582
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A putative Tournaisian and Visean volcanic-sedimentary succession in the Lublin Basin, SE Poland: depositional processes, petrological characteristics and sequence stratigraphy
    Autorzy:
    Waksmundzka, Maria I.
    Kozłowska, Aleksandra
    Pańczyk, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/1835593.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Tournaisian
    Visean
    Lublin basin
    sequence stratigraphy
    petrography
    cyclothems
    volcanic source areas
    turnej
    wizen
    niecka lubelska
    stratygrafia sekwencji
    petrografia
    cyklotemy
    Opis:
    The aim of this study was to establish the stratigraphic extent of a putative Tournaisian Stage within the Carboniferous succession in the Lublin Basin. The oldest part of the succession, known as the Huczwa Formation and comprising depositional sequences 1-4, was investigated based on lithofacies analysis, sequence stratigraphy and petrographic studies. The article provides descriptions of depositional sequences, parasequences (cyclothems) and lithofacies that were formed in a range of environments (elements of depositional architecture) and as a result of volcanic processes - lava and pyroclastic eruptions and chemical weathering of their products. Correlation of the sequence stratigraphy to the West European and global Carboniferous chronostratigraphic divisions, as well as to the Khoriv suite in the Lviv-Volyn Basin in adjacent Ukraine, indicates a putative late Tournaisian age for sequence 1, and a late Visean age for sequences 2-4. There is a stratigraphic gap between sequences 1 and 2, spanning probably the uppermost Tournaisian and the lower and middle Visean. The upper Tournaisian is represented by the FRST-LST deposits of sequence 1, comprising mainly volcaniclastic conglomerates and sandstones developed in braided-river channels and incised valleys with hyperconcentrated flow processes. These deposits are represented by polymictic paraconglomerate and lithic/sublithic/subarkose arenites or sublithic wackes, and contain predominantly grains of acidic and alkaline volcanic and igneous rocks. This material probably came from the Łuków-Wisznice Elevation and the Volynian Polesia region, located to the NE and E of the Lublin Basin. In the uppermost part of sequence 1, volcanic rocks and tuffs appear which developed during the activity of at least three volcanic cones in the Lublin Basin. The volcanoes were the source of alkaline lavas in the central and SW areas of the basin, and of acidic lavas in the SE area, previously undescribed. The Visean sequences 2-4 consist of the FRST-LST sediments deposited within incised valleys. The TST and HST deposits accumulated mainly in a shallow ramp-type carbonate shelf, shallow clayey shelf and deltaic environments.
    Źródło:
    Acta Geologica Polonica; 2021, 71, 3; 305-344
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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