Browsing by Author "Chwieduk, Edward"

Now showing 1 - 5 of 5
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    Early Permian solitary rugose corals from Kruseryggen (Treskelodden Fm., Hornsund area, southern Spitsbergen)
    (Bogucki Wydawnictwo Naukowe, 2009) Chwieduk, Edward
    A collection of solitary rugose corals collected from the Treskelodden Formation of the Kruseryggen Hill, Hornsund area, south Spitsbergen, consists of 30 specimens representing the Bothrophyllidae family with the genera Bothrophyllum, Caninophyllum, Hornsundia, and Timania (5 species), and an indeterminate family with the genus Svalbardphyllum (one species). These large, dissepimental forms, dating from the Early Sakmarian (Tastubian), indicate a warm-water environment. The lithology, the thickness of the succession, the reddish hue and the abrasion of the fossils indicate that the area of the inner Hornsund showed a relief that enabled considerable erosion of the elevated areas and redeposition of the fossils at remote locations. The changing morphology of this area during the Early Permian was probably influenced by synsedimentary block tectonics.
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    Lower Carboniferous solitary rugose corals from the Flett Formation of the Liard Basin, northwestern Canada vs. European and Asian Rugosa of the same geological age
    (Instytut Geologii UW, 2022) Chwieduk, Edward
    The paper focuses on the taxonomic description of the lower Carboniferous (uppermost Tournaisian to middle Viséan) solitary rugose corals from bedded limestone and shale units in the Flett Formation in the Jackfish Gap (eastern Liard Range), northwestern Canada. The corals described herein include 12 species representing the genera Ankhelasma Sando, 1961, Bradyphyllum Grabau, 1928, Caninophyllum Lewis, 1929, Cyathaxonia Michelin, 1847, Ekvasophyllum Parks, 1951, EnniskilleniaKabakovich in Soshkina et al., 1962, Vesiculophyllum Easton, 1944 and Zaphrentites Hudson, 1941. Two of these species are new Ankhelasma canadense sp. nov. and Ekvasophyllum variabilis sp. nov.) and 6 taxa are described in open nomenclature. The distribution and relative abundance of solitary Rugosa in Europe and the Liard Basin confirm the geographical proximity of those areas and the open marine communication between them during the early Carboniferous. It therefore represents an important contribution to the determination of the time of isolation of the western Laurussia shelf fauna from that of southeastern Laurussia, as well as the time of the possible emergence of species from southeastern Laurussia into the western aurussia seas. Of particular importance here are cosmopolitan taxa and the timing of their disappearance from the fossil record.
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    Palaeogeografical and palaeoecological significance of the Uppermost Carboniferous and Permian rugose corals of Spitsbergen
    (Wydawnictwo Naukowe UAM, 2013) Chwieduk, Edward
    The Carboniferous and Permian rugose corals of the Cordilleran-Arctic-Uralian (C-A-U) Realm, belong to the best known group of animals of those periods. Spitsbergen, situated at that time on the northern margin of the drifting supercontinent Pangea, stands out from the entire C-A-U Realm for its exceptionally large accumulation of their fossils. The climate obtaining in the Carboniferous and Early Permian was favourable to their development. At that time today’s Svalbard Archipelago lay roughly just above the Tropic of Cancer and in those periods and later kept moving northwards until it had reached its present location between the 75th and 80th parallels in the northern subpolar zone. The corals described in this monograph come from three areas: the Hornsund region, a Polakkfjellet hill, and the Grønfjorden region. They belong to both, known and new species. Thus, on the one hand, they attest to the affi nity of the Spitsbergen rugosans with the rest of the C-A-U Realm, corroborating their connection with the faunas of Alaska, the Urals, the Central European Basin, and Arctic Canada (Sverdrup Basin). On the other hand, however, they can be indicative of limited communication possibilities, or perhaps of the presence on Spitsbergen environmental conditions determining such a taxonomic composition.
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    Pochodzenie życia - wyjątkowy akt samorództwa?
    (Wydawnictwo Naukowe UAM, 2011) Chwieduk, Edward
    Książka skierowana jest przede wszystkim dla adeptów kierunków: geologii i biologii a jako lektura uzupełniająca może być wykorzystany także w paleontologii i geologii historycznej. W zamierzeniu autora praca ta ma dostarczyć niezbędnej wiedzy na temat procesów towarzyszących początkom życia na naszej planecie. Opracowanie to jest pierwszą na polskim rynku wydawniczym próbą syntetyzowania najistotniejszych koncepcji związanych z pochodzeniem życia na Ziemi. Dzięki klarownemu układowi pomaga przyswoić treści „rozproszone” w innych publikacjach, dając tym samym niezbędne podstawy do studiów paleontologicznych. Natomiast starannie dobrana bibliografia pozwala odpowiednio poszerzyć interesujące odbiorcę wątki. Język książki, bardzo przystępny, nie jest jednak zbyt eseistyczny. Z jednej strony wyróżnia to tę pozycję spośród innych publikacji o charakterze popularyzatorskim, nie zawsze solidnie traktujących kwestie merytoryczne. Z drugiej powinno ułatwić przyswojenie tych partii wiedzy, które stereotypowo traktuje się jako „trudne”. Całość stanowi zatem lekturę przystępną nawet dla tych czytelników którzy pozostając poza akademickim trybem, interesują się studiami z zakresu nauk przyrodniczych i geologicznych.
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    Polish palaeontological research in the Arctic
    (Bogucki Wydawnictwo Naukowe, 2009) Chwieduk, Edward