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Wyszukujesz frazę "Lagerstatte" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Polskie Solnhofen
    Polish Solnhofen
    Autorzy:
    Kin, A.
    Błażejowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074952.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Fossil-Lagerstätte
    tachonomia
    paleośrodowisko
    paleogeografia
    jura późna
    Polska
    Fossil-Lagerstatte
    taphonomy
    palaeoenvironment
    palaeogeography
    Late Jurassic
    Opis:
    We briefly report on recent discovery of a new Fossil-Lagerstätte at Owadów-Brzezinki quarry (central Poland), where Upper Jurassic (Upper Tithonian = Middle Volgian) shallow water carbonates are exposed. Th section includes a richly fossiliferous horizon of lithographic-type limestones, formed in a lagoonal depositional environment. Numerous organic and phosphatic remains of wide range of both marine and terrestrial creatures, including horseshoe crabs and decapods, disarticulated fish skeletons, remains of marine reptiles, ammonites, dragonflies, beetles, and rare isolated pterosaur bones and teeth, were found in association with an extremely abundant small bivalves Corbulomima obscura. The richly fossiliferous horizon at Owadów-Brzezinki is stratigraphically closely related to one of the world's most famous Fossil-Lagerstätte sites – Solnhofen (Bavaria, south-central Germany).
    Źródło:
    Przegląd Geologiczny; 2012, 60, 7; 375-379
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Konzentrat-Lagerstätte-type carbonate concretions from the uppermost Bajocian (Middle Jurassic) of the Częstochowa area, South-Cental Poland
    Autorzy:
    Zatoń, M.
    Marynowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058808.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Jurassic
    Bajocjan
    carbonate concretions
    taphonomy
    Lagerstätte
    biomarkers
    Opis:
    Early-diagenetic calcitic concretions of latest Bajocian (parkinsoni Zone, bomfordi Subzone) age in the Polish Jura contain an extremely rich and well-preserved macrofauna. In addition to bivalves and brachiopods, there are numerous ammonites of the (sub)genera Parkinsonia, Nannolytoceras, Lissoceras (Lissoceras), L. (Microlissoceras), as well as rare representatives of Vermisphinctes, Strigoceras (Strigoceras) and Phylloceras. Carapaces of primitive prosopid crabs are found associated. Such a diverse and well-preserved fauna (previously unknown from Bajocian epicratonic deposits of the Polish Jura), is typical of Konzentrat-Lagerstätte-type deposits. The random distribution of the concretions in exposure and the small size of the fauna may suggest that all remains were concentrated by bottom-current action in small depressions on an uneven sea-floor. The presence of numerous small-sized ammonites may be regarded as reflecting post-spawning assemblages which sufferedmass-mortality. Although cause of their death remains unclear, storm events are a possibility. Such depressions acted as natural “traps” as well as constituted a size-limiting factor for the accumulating fauna. The fact that all elements are well preserved indicates brief post-mortem transport and rapid burial, followed by early diagenesis that protected them from compaction. The absence of such fossil-rich concretions higher in the Middle Jurassic sequence clearly shows that our current assessment of biotic diversity may be an underestimate. The carbonate concretions contain a predominantly terrestrial type of organic matter (OM). Samples analysed are extremely immature, but early diagenetic transformations of OM occurred prior to concretion formation.
    Źródło:
    Geological Quarterly; 2004, 48, 4; 339--350
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon, oxygen and strontium isotope composition of Plattenkalk from the Upper Jurassic Wattendorf Konservat-Lagerstätte (Franconian Alb, Germany)
    Autorzy:
    Blendinger, Wolfgang
    Mäuser, Matthias
    Powiązania:
    https://bibliotekanauki.pl/articles/2060917.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Jurassic
    Plattenkalk
    isotopes
    correlation
    aged seawater
    Jura
    izotopy
    korelacja
    wiek wody morskiej
    Opis:
    The oldest Jurassic (Kimmeridgian) Plattenkalk occurs in Wattendorf on the northern Franconian Alb (southern Germany). It is a 15 m thick alternation of laminated dolomite and limestone, interbedded with carbonate debris layers in a depression ~2 km across and a few tens of metres deeper than the surrounding microbial-sponge reefs. The Plattenkalk overlies a few tens of metres of microbialsponge biostrome facies and bedded, micritic basinal limestone. The bulk-rock stable isotopes of the micritic basinal facies gradually change from normal marine (δ13C ~ +2‰, δ18O ~ –2‰ VPDB) to lower values (δ13C ~ 0‰, δ18O ~ –6‰) in a ~ 40 m thick interval including Plattenkalk and suggest ageing of the bottom waters. The surrounding reefs are isotopically nearly invariant (δ13C ~ +2‰, δ18O ~ –2‰ VPDB). An isotope anomaly (δ13C of > ~ –9‰) is restricted to the basinal facies and is most pronounced in the biostrome facies. This indicates methanogenesis, which is documented in negative δ13C in dedolomite, calcite-cemented dolomite and calcite concretions and occurred probably mainly below seabed. The Konservat-Lagerstätte was probably deposited near an oxygen minimum zone in a water column with low productivity of organic material. Dolomite is in isotopic equilibrium with Plattenkalk and was probably deposited as protodolomite from chemically modified, aged seawater. 87Sr/86Sr ratios of bulk carbonate are often slightly radiogenic, probably due to random analytical sample contamination by clay minerals. Belemnite and some matrix 87Sr/86Sr is slightly lower than that of Kimmeridgian seawater, either caused by basin restriction or by fluids derived from the diagenesis of Oxfordian rocks below. An equivalent Upper Kimmeridgian depression ~23 km distant and a somewhat younger Konservat-Lagerstätte in Poland show a δ13C isotope anomaly below the main fossil beds. Isotopic evidence for saline bottom waters, the current interpretation, is lacking. This study also shows that micritic carbonates can preserve their early diagenetic, marine δ18O signal, which is correlatable over tens of kilometres
    Źródło:
    Volumina Jurassica; 2021, 19, 1; 1--20
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Summary of a decade of research at the Owadów–Brzezinki Lagerstätte (Tithonian, central Poland): A review and perspectives for the future
    Autorzy:
    Błażejowski, Błażej
    Weryński, Łukasz
    Wierzbowski, Andrzej
    Michalska, Monika
    Hryniewicz, Krzysztof
    Uchman, Alfred
    Kugler, Stanisław
    Bącal, Paweł
    Hołda-Michalska, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/28883741.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Late Jurassic
    Tithonian
    marine fossils
    terrestrial fossils
    palaeobiogeography
    palaeontology
    późna jura
    Tytonian
    skamieniałości morskie
    skamieliny ziemskie
    paleobiogeografia
    paleontologia
    Opis:
    For over ten years, the Lower to Upper Tithonian boundary beds cropping out in the Owadów–Brzezinki quarry have yielded numerous fossils of ammonites, bivalves, brachiopods, xiphosurans, decapods, insects, and vertebrates – including actinopterygian fishes and various reptiles and others, all of which exhibit fine preservation of their anatomical details due to special environmental conditions during their fossilization. The Owadów–Brzezinki section is also important for stratigraphical correlations because it contains ammonite faunas indicative of the NE European and NW European Subboreal zonal schemes, as well as Tethyan calpionellids. The whole faunal as- semblage, which represents taxa of many iconic groups of Mesozoic animals, has created the opportunity to establish the ‘Owadów– Brzezinki geopark’, a geoeducation area where the public, and especially the young, can learn about the beauty of the natural history of the region.
    Źródło:
    Volumina Jurassica; 2023, 21; 83--98
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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