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    Wyświetlanie 1-15 z 15
    Tytuł:
    Middle Palaeozoic chondrichthyans and the associated ichthyofauna from southern Poland : a review
    Autorzy:
    Ginter, Michał
    Wilk, Olga
    Powiązania:
    https://bibliotekanauki.pl/articles/1835970.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Chondrichthyes
    Osteichthyes
    Devonian
    Carboniferous
    Polska
    Opis:
    During the last sixty years, large collections of ichthyofauna, mainly isolated, microscopic, skeletal remains (ichthyoliths), from the Middle–Upper Devonian and Lower Carboniferous rocks of southern Poland have accumulated in the hands of Polish palaeontologists and in palaeontological institutions. Some parts of these collections were described in unpublished dissertations and others were published in dispersed papers, dealing mostly with selected regions or taxa. This review summarises the available data from the following regions: the Holy Cross Mountains, the Cracow Upland, the Sudetes and the Lublin Coal Basin (in the latter two cases, single localities). Altogether, 29 chondrichthyan species were identified and a few more still require classification. Of the Sarcopterygii, three species of onychodontiforms and one of the actinistians were found, in addition to a collection of dipnoans that was described much earlier. A few morphological types were distinguished among actinopterygian scales; otherwise the actinopterygian fossils are not referred to any lower-level taxon, and the same applies to the acanthodians. There were several attempts in the past to apply Polish ichthyoliths in biostratigraphy and palaeoecology, but after all these years, it appears that such propositions have only limited significance.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2021, 91, 3; 253-286
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New morphological features of Arthropleura sp. (Myriapoda, Diplopoda) based on new specimens from the Upper Carboniferous of Lower Silesia (Poland)
    Autorzy:
    Pacyna, G.
    Florjan, S.
    Borzęcki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/191942.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Arthropleura
    Upper Carboniferous
    Lower Silesia
    Polska
    Opis:
    New tergite fragments of Arthropleura were found at the Nowa Ruda mine (Lower Silesia, Poland), after more than seventy years since any previous discovery. The small dimensions of the preserved structures, in terms of the genus Arthropleura, and the characteristic features of tuberculation probably indicate that the remains do not belong to the type species A. armata, but they could represent a new species. The occurrence of round protrusions in the broken-off tubercles is another feature of the new specimens, which has not been mentioned in the earlier literature. Unfortunately, the scanty remains that we have at our disposal (only two specimens were found) are not sufficient for the proposal of a new species. The number of valid Arthropleura species requires further investigation, especially regarding the features, which are diagnostic for species. The tergites described have very numerous tubercles, which may have taxonomic value in species discrimination. Because the fossils were found on a dump, their exact stratigraphic position is not known. However, they occur together with index leaflets of the seed ferns Paripteris gigantea and Linopteris sp., which enabled the age determination of Upper Namurian - Lower Westphalian for the fossils studied. This new discovery of Arthropleura contributes to a better understanding of the genus and of the Carboniferous land fauna of Poland, which is otherwise poorly known. This is also the first, detailed description of Arthropleura remains from the Polish Carboniferous.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 2; 121--126
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Colour pattern of Naticopsis planispira (Neritimorpha, Gastropoda) shell from Upper Carboniferous of Upper Silesian Coal Basin, southern Poland
    Autorzy:
    Krawczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/191753.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Gastropoda
    Neritimorpha
    colour pattern
    Carboniferous
    Polska
    Opis:
    A zigzag colour pattern with additional collabral belts and irregular spots was observed on a shell of Naticopsis (N.) planispira (Phillips, 1836) found in the Gołonóg Sandstone marine faunal horizon (Namurian A, the Upper Silesian Coal Basin, Poland). A disruption in the colour pattern was also observed to have occurred during ontogenetic shell growth. In this specimen, it appeared in the healed shell damage on the outer lip. So far, only nine Carboniferous species of Naticopsis have been reported with the colour pattern preserved. The most common are the zigzag-type and the spiral band-type. Individual taxa clearly differ in the morphology of the chevrons (direction and angles of breaks) and the location and width of the spiral bands on a whorl. However, the color patterns may not be diagnostic features for the Naticopsis species, because of the large intraspecific variation and colour pattern polymorphism on the neritimorph shells. Colour patterns on Palaeozoic neritimorph shells most likely served as camouflage with respect to the bottom surface in the photic zone.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 2; 87--97
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Footprints of the earliest reptiles : Notalacerta missouriensis : Ichnotaxonomy, potential trackmakers, biostratigraphy, palaeobiogeography and palaeoecology
    Autorzy:
    Marchetti, Lorenzo
    Voigt, Sebastian
    Lucas, Spencer G.
    Stimson, Matthew R.
    King, Olivia A.
    Calder, John H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1836266.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Carboniferous
    Permian
    eptile tracks
    Notalacerta
    ichnotaxonomy
    trackmaker
    Opis:
    The origin of reptiles in the tetrapod footprint record has always been a debated topic, despite the great potential of fossiliferous ichnosites to shed much light on reptile origins when compared to the much less extensive skeletal record. This is in part due to an unclear ichnotaxonomy of the earliest tracks attributed to reptiles that has resulted in unreliable trackmaker attributions. We comprehensively revise the earliest supposed reptile ichnotaxon, Notalacerta missouriensis, based on a neotype and a selection of well-preserved material from the type locality and other sites. A synapomorphy-based track-trackmaker attribution suggests eureptiles and, more specifically, ́protorothyridids ́ such as Paleothyris as the most probable trackmakers. A revision of the entire Pennsylvanian-Cisuralian record of this ichnotaxon unveils an unexpected abundance and a wide palaeogeographical distribution. The earliest unequivocal occurrence of Notalacerta is in the middle Bashkirian (early Langsettian) at the UNESCO World Heritage Site, Joggins Fossil Cliffs (Joggins, Nova Scotia, Canada). This occurrence also coincides with the earliest occurrence of reptile body fossils (Hylonomus lyelli), which are found at the same site. Notalacerta is abundant and widely distributed during the Bashkirian, mostly in sediments deposited in tidal palaeoenvironments, and less common in the Moscovian and Kasimovian. During the Gzhelian and Asselian, Notalacerta occurrences are unknown, but it occurs again during the Sakmarian and is widespread but not abundant during the Artinskian, mostly in fully continental palaeoenvironments.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 3; 271-290
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and palaeoecology of new, non-marine microconchid tubeworm from Lower Carboniferous (Upper Mississippian) of West Virginia, USA
    Autorzy:
    Zatoń, M.
    Peck, R. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/191946.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microconchids
    Mississippian
    Carboniferous
    encrusters
    palaeoecology
    fresh waters
    Opis:
    A new species of a non-marine microconchid (Tentaculita) tubeworm, Microconchus hintonensis, from the Lower Carboniferous (Upper Mississippian, Chesterian) of West Virginia, USA, is described. Non-marine microconchids occur abundantly in the deposits of the Bluefield, lower Hinton, Princeton and Bluestone Formations of the Mauch Chunk Group, where they are either associated with land plant remains and bivalve shells, or are preserved loose in the host sediment. The specimens attached to plant remains and bivalve shells, are poorly preserved, but those occurring loose in the deposits are well-preserved in three dimensions. The interpretation pre sented here, is that the loose specimens of Microconchus hintonensis sp. nov. also originally encrusted plants (land plants, algae) and bivalve shells, but became detached after substrate degradation and dissolution. The association of land plant remains, charophyte gyrogonites, bivalves, ostracodes, conchostracans, and fish teeth and scales, and the concomitant lack of strictly marine fossils indicate that the microconchid-bearing deposits of the lower Hinton, Princeton and Bluestone Formations were deposited in fresh-water environments. Microconchus hintonensis sp. nov. is regarded as a highly fecund, opportunistic species that in large numbers colonized every available substrate in its habitat. Its abundance in the deposits investigated indicates that the species was welladapted to the environments it occupied, even during episodes of higher sedimentation rates and/or competition with other soft-bodied encrusters. During such episodes, microconchids were able to grow vertically by uncoiling and elevating their tubes, in order to escape potential burial and/or overgrowth by other encrusters.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 1; 37-50
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Miospore taxonomy and stratigraphy of Upper Devonian and lowersmost Carboniferous in Western Pomerania (NW Poland)
    Taksonomia i stratygrafia miosporowa górnego dewonu i najniższego karbonu Pomorza Zachodniego
    Autorzy:
    Stempień-Sałek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191363.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Frasnian
    Famennian
    lowermost Carboniferous
    NW Poland
    miospores
    stratigraphy
    Opis:
    Five local miospore zones, six subzones and two assemblages are distinguished for the Frasnian to lower Tournaisian deposits in the Kołobrzeg region (western Pomerania): assemblage I, Membrabaculisporis radiatus-Tholisporites densus (RD), Membrabaculisporis radiatus-Cymbosporites boafeticus (RB), Lagenoisporites immensus-Diducites poljessicus (IP) Zone, assemblage II, Tumulispora rarituberculata (Ra) and Convolutispora major (Ma) Zone. The first three biozones and the two assemblages are new in this region. The local miospores zones distinguished in western Pomerania are correlated with the European standard miospore and conodont zonations. Two new miospore species and one new variety are described, two species is emended.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2002, 72, No 2; 163-190
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discovery of plywood structure in Sphenothallus from Gurovo Formation (Mississippian), Central Russia
    Autorzy:
    Vinn, Olev
    Mironenko, Aleksandr A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835998.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Scyphozoa
    biomineralization
    tube microstructure
    ultrastructure
    mineral composition
    Carboniferous
    Opis:
    Sphenothallus specimens are reported for the first time from the Mississippian of Central Russia. All Sphenothallus specimens have a phosphatic composition and a characteristic laminar structure, which is best observable in the thickened lateral parts of a tube. Most of the lamellae in the tube wall are straight, but some have a wavy morphology and a few are so wrinkled that they form hollow “ribs”. The wrinkled lamellae presumably had an originally higher organic content than the straight lamellae. There are borings on the surfaces of some lamel-lae that are similar in morphology to the bioerosional traces in various hard, biomineral substrates. Lamellae in the inner parts of the tube wall are composed of fibres. The fibres are parallel to the surface of the tube wall and in successive laminae they differ in orientation by irregularly varying angles. It is possible that the plywood micro-structure in Sphenothallus was originally organic and was later phosphatized during fossilization. An alternative, but less likely explanation is that the plywood structure was originally mineralized and therefore is comparable to the phosphatic lamello-fibrillar structures of vertebrates.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2021, 91, 1; 67-74
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Burial and thermal history of the Upper Silesian Coal Basin (Poland) constrained by maturity modelling : implications for coalification and natural gas generation
    Autorzy:
    Botor, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1836355.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    maturity modelling
    vitrinite reflectance
    hydrocarbon generation
    methane
    Variscides
    Carboniferous
    Opis:
    Maturity modelling was carried out using basin and petroleum system modelling (BPSM) software in the lithologic sections of 17 wells of the Upper Silesian Coal Basin (Poland). The best fit between calculated and measured vitrinite reflectance (VR), porosity and density data was obtained by applying a thickness of eroded sedimentary overburden from 1700 m in the east to 4500 m in the west and relatively low to moderate heat flow values during the maximum late Carboniferous burial. These heat flow values were in the range 50-71 mW/m2
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 2; 99-123
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First evidence of arthropod herbivory in calamitalean stems from the Pennsylvanian of Germany
    Autorzy:
    Laaß, Michael
    Kretschmer, Sophie
    Leipner, Angelika
    Hauschke, Norbert
    Powiązania:
    https://bibliotekanauki.pl/articles/1836364.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Late Carboniferous
    Pennsylvanian
    borings
    calamitalean stem
    plant-arthropod interaction
    Opis:
    Arthropod borings are commonly described from pteridophyte and gymnosperm wood in the late Palaeozoic, but they are almost unknown from calamitalean stems. In this paper, a new type of boring in calamital- ean stems from two German localities is reported. These are the mine dumps of Plötz near Halle (Saale), Saale Basin, (Wettin Subformation, Latest Pennsylvanian, Gzhelian, Stephanian C) and the Piesberg quarry near Osnabrück, Subvariscan Foreland Basin, (Osnabrück Formation, Middle Pennsylvanian, latest Moscovian, Asturian/ Westphalian D). Most borings were found in marginal parenchyma of the internodes. They run longitudinally through the pith. The borings are preserved as three-dimensional casts that protrude on the surface of considerably compressed pith casts. This unique preservation of the boring casts required special taphonomic conditions, such as rapid burial coupled with different sediment infilling of the borings and the pith cavity, as well as anoxic conditions to prevent decomposition of the non-resistant parenchyma. Most borings are between 3 to 5 mm wide and contain two classes of invertebrate coprolites: the smaller coprolites are sub-spheroidal in shape and measure (37 to 74) x (37 to 63) pm in diameter. The larger coprolites are also sub-spheroidal and range between (88 to'158) x (68 to 123) pm in diameter. The coprolites, the morphology of the borings, as well as the feeding strategy of the arthropods, suggest that the tunnel system was most likely produced by small millipedes (Myriapoda) and probably also visited by oribatid mites.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 3; 219-246
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Carboniferous thin-skinned deformation in the Lublin Basin, SE Poland: Results of combined seismic data interpretation, structural restoration and subsidence analysis
    Autorzy:
    Kufrasa, Mateusz
    Stypa, Agata
    Krzywiec, Piotr
    Słonka, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/191345.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    quantitative modelling
    burial analysis
    structural interpretation
    Late Carboniferous deformation
    Lublin Basin
    Opis:
    The aim of this study was to investigate the factors, which controlled the lateral change of structural style in the southeastern part of the Lublin Basin (Poland). Five selected seismic reflection profiles were interpreted with a focus on structural interpretation. Along the representative seismic reflection profile, a geological cross-section was constructed and restored. The structural model was supplemented/refined with core analysis to characterize the deformation mode affecting Silurian strata at a sub-seismic scale (i.e. below the seismic vertical resolution). Published palaeothickness maps were used to estimate the pre-deformation thickness of partly eroded Carboniferous rocks. The results of cross-section restoration were then compared to the subsidence modelling carried out for one deep well. The study revealed that during Late Carboniferous shortening, a thick layer of Silurian shales played the role of detachment level, above which brittle Devonian-Carboniferous strata were folded and thrust. The lateral extent of thin-skinned deformation was controlled by the presence of a step in the basement and the pinching out of the Silurian strata. In the northwestern part of the Lublin Basin, the Kock Fault Zone acted as a region of strain concentration, where Silurian shales were tectonically thickened, and shows a ductile style of deformation resembling the mushwad structures of the Appalachian fold-and-thrust belt.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2019, 89, 2; 175-194
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Carboniferous-Neogene geodynamic evolution and paleogeography of the circum-Carpathian region and adjacent areas
    Późnokarbońsko-neogeńska geodynamiczna ewolucja i peleogeografia rejonu wokółkarpackiego i obszarów przyległych
    Autorzy:
    Golonka, J.
    Oszczypko, N.
    Ślączka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191280.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    plate tectonics
    paleogeography
    Tethys
    Mediterranean
    Carpathians
    Carboniferous
    Triassic
    Jurassic
    Cretaceous
    neogene clays
    Opis:
    Twelve time interval maps were constructed which depict the plate tectonic configuration, paleogeography and general lithofacies. The aim of this paper is to provide the geodynamic evolution and position of the major tectonic elements of the area within the global framework. The Hercynian orogeny was concluded with the collision of Gondwana and Laurussia, whereas the Tethys Ocean formed the embayment between the Eurasian and Gondwanian branches of Pangea. The Mesozoic rifting events resulted in the origin of the oceanic type basins like Meliata and Pieniny along the northern margin of the Tethys. Separation of Eurasia from Gondwana resulted in the formation of the Alboran-Ligurian-Pieniny Ocean as a part of the Pangean breakup tectonic system. During the Late Jurassic-Early Cretaceous time, the Outer Carpathian rift had developed. Latest Cretaceous-earliest Paleocene was the time of the closure of the Pieniny Ocean. Adria-Alcapa terranes continued their northward movement during Eocene-Early Miocene time. Their oblique collision with the North European plate led to the development of the accretionary wedge of Outer Carpathians and foreland basin. The formation of the West Carpathian thrusts was completed by the Miocene time. The thrust front was still progressing eastwards in the Eastern Carpathians.
    Dla obszaru wokółkarpackiego skonstruowano 12 map przedstawiających konfigurację płyt litosferycznych, paleogeografię i uproszczony rozkład litofacji w okresie od późnego karbonu po neogen. Przedstawiono ewolucję geodynamiczną tego rejonu na tle ruchu płyt i pozycji głównych elementów tektonicznych w globalnym układzie odniesienia. Orogeneza hercyńska zakończyła się kolizją Gondwany i Laurusji, a Ocean Tetydy utworzył zatokę pomiędzy dwom a ramionami Tetydy - Gondwaną i Laurazją. W wyniku mezozoicznych ryftów wzdłuż północnej krawędzi Oceanu Tetydy powstało szereg basenów typu oceanicznego takich jak Meliata i basen pieniński. Ocean alborańsko-liguryjsko-pieniński powstał w wyniku oddzielenia się Gondwany i Laurazji jako fragment tektonicznego sytemu rozpadu Pangei. W okresie od późnej jury do wczesnej kredy rozwinął się ryft Karpat Zewnętrznych. Na przełomie kredy i paleocenu nastąpiło zamknięcie basenu pienińskiego pasa skałkowego. W okresie od eocenu do wczesnego miocenu terany Adri-Alkapy i Karpat Wewnętrznych kontynuowały ruch w kierunku północnym, a ich kolizja z płytą euroazjatycką doprowadziła do powstania pryzmy akrecyjnej Karpat Zewnętrznych i basenu przedgórskiego. Przy końcu miocenu środkowego uformowały się ostatecznie nasunięcia Karpat Zachodnich, podczas gdy w Karpatach Wschodnich ruchy te przetrwały do końca pliocenu.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2000, 70, 2; 107-136
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conditions of accumulation and sedimentary architecture of the upper Westphalian Cracow Sandstone Series (Upper Silesia Coal Basin, Poland)
    Warunki akumulacji i architektura krakowskiej serii piaskowcowej górnośląskiego zagłębia węglowego
    Autorzy:
    Doktor, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191702.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    braided fluvial system
    fluvial architecture
    coal-bearing deposits
    Carboniferous
    Upper Silesia
    Polska
    Opis:
    The Cracow Sandstone Series (upper Westphalian) forms the uppermost segment of the coal-bearing succession that makes up the bulk of the Variscan foredeep-basin fill in the Upper Silesia Coal Basin. The series, up to 1640 m in stratigraphic thickness, consists entirely of non-marine deposits. Fiveteen lithofacies have been distinguished in the sediments of this series. The Cracow Sandstone Series is subdivided here in two lithofacies associations. The sandstone association consists mainly of medium- to coarse-grained sandstones that form packages up to several tens of metres thick (max. 140 m), with surfaces of erosion at base. These bodies are separated by less voluminous packages of the mudstone association that consists mainly of mudstones and coal seams, which locally make up the predominant part in the sequences of this association. The sediments of the sandstone association are believed to have originated within wide channel tracts of distal sandy braided rivers. The sediments of the mudstone association with the interbedded coal seams are interpreted as floodplain deposits. The predominant type of peat bogs, represented now in the coals of the Cracow Sandstone Series, were wet forest swamps. The peat bogs were probably slightly domed and their margins received clastic material from adjacent channels. This resulted in the frequent lateral splitting of the coal seams. The large-scale splitting of seams is associated with lateral transition of fine-grained floodplain deposits into coarse-grained channel deposits. The vertical alternation of the channel and floodplain deposits is the result of natural processes on an alluvial plain that resulted in shifting positions of depositional environments, first of all avulsion of the whole fluvial tracts. The coal seams in the Cracow Sandstone Series do not form extensive sheets of persistent thickness, and their geometry depends on the course and evolution of the network of fluvial tracts in the alluvial system. The internal geometry of the Cracow Sandstone Series was controlled to a large extent by differential compaction of sediments, notably by rapid compaction of peat.
    Krakowska seria piaskowcowa stanowi najwyższą część sukcesji węglonooenej Górnośląskiego Zagłębia Węglowego wypełniającej waryscyjskie, fleksuralne zapadlisko przedgórskie. Seria osiąga 1640 m miąższości stratygraficznej i zbudowana jest wyłącznie z osadów lądowych. W osadach tej serii wyróżniono 15 litofacji oraz dwie, wyraźnie różniące się asocjacje facjalne, określone jako piaskowcowa i mułowcowa. Osady pierwszej z tych asocjacji, złożonej w przewadze z piaskowców średnioziarnistych, dominują w całej serii i z reguły tworzą grube ciała (litosomy),dochodzące nawet do 140 m miąższooeci. Litosomy te rozdzielone są cieńszymi pakietami osadów asocjacji mułowcowej, w których obok osadów klastycznych, z reguły drobnozianistych, pospolicie występują pokłady węgla, nieraz znacznej miąższości. Cała krakowska seria piaskowcowa interpretowana jest jako osady rozległej równiny aluwialnej związanej z systemem piaszczystych, dystalnych rzek roztokowych. W obrębie traktów koryt rzek roztokowych powstawały tam ciała piaszczyste, które zazwyczaj wykazują cechy wielopiętrowych nagromadzeń osadów korytowych. Obszary pozakorytowe były miejscem depozycji materiału drobnoziarnistego i miejscem rozwoju węglotwórczych torfowisk; w pobliżu traktów koryt rozwijały się tam też glify krewasowe. Dominującym typem torfowisk w omawianej serii były wilgotne torfowiska leśne. Pokłady węgla nie mają charakteru ciągłych pokryw o stałej miąższości, a ich geometria i lateralne rozprzestrzenienie zależało od przebiegu i rozwoju sieci traktów systemu rzecznego. Obserwowane zjawiska wielkoskalowego rozszczepiania pokładów węgla i widoczne w tych miejscach lateralne przejścia do osadów korytowych dowodzą współistnienia traktów rzecznych i węglotwórczych torfowisk rozwiniętych na obszarach pozakorytowych Litosomy piaskowcowe mają geometrię pokryw, ale o ograniczonym zasięgu lateralnym. Za stosunkowo dużą stabilnością macierzystych traktów koryt przemawia znaczna miąższość tych litosomów, podobnie jak pospolita, znaczna miąższość pokładów węgla. Naprzemianległe występowanie w profilach pionowych ciał piaskowcowych i ciał reprezentujących osady asocjacji mułowcowej jest wynikiem naturalnych procesów zachodzących na równinie aluwialnej, które powodowały przemieszczanie się środośrodowisk depozycyjnych, głównie procesów awulsji całych traktówkoryt rzecznych. Architektura sedymentacyjna krakowskiej serii piaskowcowej odzwierciedla przede wszystkim efekty wspomnianych procesów, a w dużym stopniu związana jest też ze zróżnicowaną kompakcją osadów gruboziarnistych, drobnoziarnistych i torfów.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2007, 77, No 3; 219-268
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of the fluvial-channel tracts based on thickness analysis: Zabrze Beds (Namurian B) in the Main Anticline and Bytom-Dąbrowa Trough of Upper Silesia Coal Basin, Poland
    Trakty koryt rzecznych w warstwach zabrskich (namur B) na podstawie analizy miąższości w rejonie siodła głównego i niecki bytomsko-dąbrowskiej Górnośląskiego Zagłębia Węglowego, Polska
    Autorzy:
    Kędzior, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191194.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    fluvial sedimentology
    sandbody geometry
    fluvial-channel tracts
    Upper Carboniferous
    Upper Silesia Coal Basin
    Opis:
    The studied area of ca. 500 km2 lies within the Main Anticline and the Bytom-Dąbrowa Trough of the Upper Silesia Coal Basin. During the deposition of the fluvial Zabrze Beds, this area was subject to differential subsidence which resulted in gradual eastward thinning of this unit from ca. 250 m near Zabrze to ca. 4 m near Sosnowiec. Maps of net sandstone and coal contents in two stratigraphical intervals selected within the Zabrze Beds point to the presence of four channel tracts. The main tract is parallel to the NE-SW trending axis of maximum subsidence, and the other three are perpendicular to it. During deposition of the Zabrze Beds the main, NE-SW trending channel tract has shifted westward.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2001, 71, No 1; 21-34
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chromium-rich illite/smectite in the basal Balinka Conglomerate of the Upper Carboniferous-Permian Boskovice Basin (Bohemian Massif). Annales Societatis Geologorum Poloniae
    Autorzy:
    Hršelová, Pavla
    Houzar, Stanislav
    Buriánek, David
    Všianský, Dalibor
    Szczerba, Marek
    Ciesielska, Zuzanna
    Štelcl, Jindřich
    Nehyba, Slavomír
    Powiązania:
    https://bibliotekanauki.pl/articles/24201051.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Chromium illite-smectite
    Cr-rich spinelides
    Balinka Conglomerate
    diagenetic alteration
    Upper Carboniferous
    Boskovice Basin
    Bohemian Massif
    Opis:
    The Upper Carboniferous polymictic Balinka Conglomerate was deposited along the western margin of the Boskovice Basin (eastern part of the Bohemian Massif). Angular aggregates of deep-green chromium-rich interstratified clay mineral R1-illite(0.8)/smectite (I/S) are present exclusively in the basal part of this unit. The textural position of chromium-bearing I/S (0.77–2.88 wt.% Cr2O3; 0.040–0.153 apfu Cr) in the conglomerate matrix indicates a genetic link with the highly altered chromium spinel, which is preserved in the relics. The source of Cr-rich spinelides was serpentinized peridotites in the adjacent Moldanubicum (Gföhl Unit). The formation of I/S is related to diagenetic processes in the conglomerate matrix. The fluids would have relatively high fugacity of CO2 and activity of K+. K/Ar ages of 284.1 ± 7.7 and 276.3 ± 7.4 Ma (lower Permian – Kungurian/Artinskian age) confirmed the diagenetic origin of this I/S.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2023, 93, 2; 195--210
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stephanian-Early Permian basaltic trachyandesites from the Sławków and Nieporaz-Brodła Grabens near Kraków, Southern Poland
    Autorzy:
    Lewandowska, A.
    Rospondek, M. J.
    Nawrocki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/191897.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Upper Carboniferous/Permian volcanism
    a-a lava flows
    autoclastic breccias
    basaltic trachyande-sites
    transitional calc-alkaline to alkaline rocks
    hydrous magma
    Opis:
    In the Kraków-Lubliniec section of the major Hamburg-Kraków-Dobrogea Fault Zone (HKDFZ), the Stephanian-Early Permian magmatic activity was simultaneous with subsidence/uplift of formed blocks. In the proximity of the uplifted areas the sedimentation started with fanglomerates, distally passing into playa siltstone and was accompanied by volcanism. In the Nieporaz-Brodła graben, basaltic trachyandesite a-a lava flows with autoclastic breccias reach ca. 150 m in thickness. The weathering recorded as adhesive rims around breccia clasts reflects palaeosoil formation during quiescence periods between the eruptions. The eruptions were effusive although scoriaceous lava indicates high volatile content of the magma. The water content before eruption had to be over 2 wt. percent. Only then the crystallisation model predicts accurately the type, composition and order of the crystallising phases. Thus, the basaltic trachyandesite magma originated from a source containing hydrous phase (i.e., amphibole or phlogopite). All the studied basaltic trachyandesites had fayalitic olivine on their liquidus reflecting the crystallisation stage in a magma chamber at crustal depths. During final decompression on the magma ascent due to water exsolution, the olivine was followed by plagioclase, spinel, augite, ilmenite, apatite, K-feldspar and residual high-K rhyolitic glass. The high potassium content of these volcanics was thus a primary feature reflecting the source geochemistry and differentiation trend, and its consequence was potassium metaso- matism. Due to water exsolution the glass was altered, however, homogenous interstitial glass survived in some rocks. The glass is strongly enriched in incompatible trace elements, showing that it is a highly fractionated residual melt fraction of the basaltic trachyandesite magma. Thus, the glass geochemistry reflects the trend of fractional crystallisation indicating that co-occurring K-rich felsic rocks were not derived from the same magma. All the basaltic trachyandesites studied have calc-alkaline to alkaline affinity. They contain fayalitic olivine and are low in MgO <5 wt. %, Cr and Ni, the features characteristic for evolved magmas. They show significant negative Sr/Sr*> 0.5-0.80 and small Eu/Eu* > 0.9-1.0 anomalies suggesting fractionation of plagioclase. The Eu/Eu* anomaly is probably compensated by amphibole retaining in the source. Negative Nb, Ti anomalies suggest Fe-Ti oxide fractionation characteristic for calc-alkaline evolution trend. A significant enrichment in LREE relatively to HREE (La/Yb > 10) indicates subduction-related metasomatism. However, the described tectonic context is inconsistent with subduction related characteristics. Concluding, the observed geochemical characteristics indicate remarkable role of water in magma evolution. The volcanism was related to strike-slip dextral movement along the Kraków-Lubliniec section of HKDFZ, transformed into crustal extension and subsidence, the features typical for the formation of pull-apart basins, in the late stages of the Variscan orogen evolution.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2010, 80, No 3; 227-251
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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