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    Wyświetlanie 1-13 z 13
    Tytuł:
    Phymatoderma melvillensis isp. nov. and other trace fossils from the Cape Melville Formation (Lower Miocene) of King George Island, Antarctica
    Autorzy:
    Uchman, Alfred
    Gaździcki, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2051628.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctica
    King George Island
    Cape Melville Formation
    ichnofossils
    Miocene
    glacio−marine strata
    Źródło:
    Polish Polar Research; 2010, 1; 83-99
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corkscrew-like horizontal trace fossils with a focus on a new ichnospecies of Helicodromites from the Oligocene Molare Formation of NW Italy
    Autorzy:
    Uchman, Alfred
    Rattazzi, Bruno
    Powiązania:
    https://bibliotekanauki.pl/articles/31342968.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnology
    ichnotaxonomy
    new ichnospecies
    Piemonte Tertiary Basin
    Paleogene
    Opis:
    Horizontal helical trace fossils constitute a characteristic burrow architectural design, but their ichnotaxonomy requires some clarification. In this paper, we review and revise this taxonomy on the basis of collections and data from the literature. Helicorhaphe is included in Helicodromites because its type ichnospecies displays the same morphological principles. A new ichnospecies of Helicodromites is distinguished from Oligocene offshore fan delta deposits in NW Italy. All ichnospecies of Helicodromites display a characteristic set of morphometric parameters that allow their distinction. All were probably produced by capitellid polychaetes in a deep tier within the sediment. They were generally stationary burrows, whose tracemakers benefited from feeding on microbes without significant sediment reworking.
    Źródło:
    Geological Quarterly; 2023, 67, 2; art. no. 22
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New trace fossils from the La Meseta Formation (Eocene) of Seymour Island, Antarctica
    Autorzy:
    Uchman, Alfred
    Gaździcki, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2051913.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctica
    Eocene
    trace fossils
    Źródło:
    Polish Polar Research; 2006, 27, 2; 153-170
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New interpretation of the provenance of crystalline material from Oligocene flysch deposits of the Skole Nappe, Poland: evidence from heavy minerals and clasts in the Nowy Borek section
    Autorzy:
    Salata, Dorota
    Uchman, Alfred
    Powiązania:
    https://bibliotekanauki.pl/articles/94293.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    detrital material
    provenance
    Futoma Member
    Carpathians
    materiał detrytyczny
    pochodzenie
    Futoma
    Karpaty
    Opis:
    The Futoma Member (Oligocene, Rupelian) of the Menilite Formation is present only in the northern part of the Skole Nappe. Some diatomitic layers of this member in the Nowy Borek section contain coarse-grained detrital material composed of a variety of metamorphic, volcanic and sedimentary rock fragments. The material derives from primary and secondary sources. Most abundant are debris of metamorphic rocks, mostly gneisses and mica schists. The metamorphic origin of these rocks is confirmed by the composition of heavy mineral assemblages and garnet chemistry. These rocks could have been transported from a local source located close to the margin of the Skole Basin or within that basin. The volcanic rocks reflect Paleogene volcanic activity that was widespread in the Carpathian region. Cherts, which could have been subjected to synsedimentary erosion, may have been derived from the older portions of the same formation.
    Źródło:
    Geologos; 2019, 25, 2; 163-174
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Clasts derived from rhizocretions in shallow-marine Miocene clastic deposits of northern Hungary: an example of zombie structures
    Autorzy:
    Uchman, Alfred
    Dávid, Árpád
    Fodor, Rozália
    Powiązania:
    https://bibliotekanauki.pl/articles/25173307.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    redeposition
    concretions
    rhizocretions
    alaeosols
    clastic deposits
    Neogene
    Opis:
    Disc- and cylindrical-shaped clasts of fine-grained calcareous and ferruginous rock, each with a central tunnel, occur in shallow marine brackish Miocene sandy deposits of the Egyházasgerge Formation in Hungary. Previously, these have been interpreted as enigmatic biogenic (?) structures. After field and laboratory examination and comparisons with sub-recent rhizoclasts in subsoils developed on Quaternary fine-grained deposits in SE Poland, they are re-interpreted as redeposited rhizocretions possibly washed out of the coeval continental deposits of the Salgótarján Lignite Formation. Most are fragmented and abraded. They are termed rhizoclasts and are presented as an example of zombie structures inherited from another environment where they played a different role. Such rhizoclasts can be considered as an indicator of the source of the clastic material transported from a vegetated landmass on which moderate or poorly drained soils develop and plant roots penetrate the fine-grained substrate. In such soils, iron was mobilized, then fixed by oxidation, as the water table and oxygen levels fluctuated.
    Źródło:
    Geological Quarterly; 2023, 67, 1; art. nr 4
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Płaszczowina reglowa górna (choczańska) między Doliną Lejową a Doliną Chochołowską w Tatrach
    Upper Sub-Tatric (Choč) Nappe between the Lejowa and Chochołowska valleys in the Tatra Mountains
    Autorzy:
    Gaździcka, Elżbieta
    Gaździcki, Andrzej
    Filipczak, Karolina
    Uchman, Alfred
    Powiązania:
    https://bibliotekanauki.pl/articles/2074626.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    stratygrafia
    tektonika
    trias
    jura
    płaszczowina choczańska
    Tatry
    stratigraphy
    tectonics
    Triassic
    Jurassic
    Choč Nappe
    Tatra Mts.
    Opis:
    The studied area contains the Middle to Upper Triassic successions of the Hronicum domain (Choč Nappe), forming at least three tectonic units. From the bottom to the top, they include: the Furkaska, the Siwa Woda and the Koryciska thrust slices. Sedimentary successions of these units differ in details, but generally they contain: the Ramsau Dolomite (Middle Anisian), Reifling Limestone interfingering with the Partnach Beds (uppermost Anisian-Ladinian), Wetterstein Dolomite (Ladinian-Lower Carnian), Hauptdolomite (Upper Carnian-Norian) and grey fossiliferous limestones of the Norovica Formation (uppermost Norian-Rhaetian). Between the Furkaska and the Siwa Woda thrust slices, calcareous and siliciclastic deposits of the Krína Nappe representing the Fatra and the Kopieniec formations(Rhaetian-Sinemurian) are sandwiched. Thus, within the Triassic successions of the Choč Nappe on the eastern slope of Cisowa Turnia (Lejowa Valley), a new tectonic unit "Pod Cisową" was proposed, which originated from Krína domain.
    Źródło:
    Przegląd Geologiczny; 2009, 57, 1; 56-63
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Deep-sea trace fossils from the Numidian Formation (Upper Oligocene–Lower Miocene) in the Ouarsenis Mountains, northwestern Algeria
    Autorzy:
    Menzoul, Bouabdellah
    Uchman, Alfred
    Adaci, Mohamed
    Bensalah, Mustapha
    Powiązania:
    https://bibliotekanauki.pl/articles/2135034.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnology
    flysch
    turbidites
    Atlas
    Paleogene
    Neogene
    Opis:
    Trace fossils and lithofacies have been studied for the first time in the Numidian Formation (Upper Oligocene–Lower Miocene) of the Ouarsenis Mountains in Algeria to interpret their depositional environment. Twenty-two ichnogenera have been recognized in eight lithofacies of three main facies associations in four representative sections. Distribution of the trace fossils is dependent on the facies. Most trace fossils are dominated by post-depositional forms (62%) and occur in fine-grained, thin-bedded sandstones of facies F4. They belong to the Ophiomorpha rudis, Paleodictyon and the Nereites ichnosubfacies of the Nereites ichnofacies. The O. rudis ichnosubfacies is recorded in 1) medium- to very thick-bedded sandstones of the facies association FA1, interbedded with thinner sandstone beds of the facies F2 and F4 in the upper unit of the sections studied, which were deposited in channel fill and levee-overbank environments, and in 2) medium- to thin-bedded sandstones of the facies association FA2 in the lower unit of the Kef Maiz and the Ain Ghanem sections, which were deposited in isolated narrow channels within the mud-dominated part of the depositional system and occasionally fed with turbiditic sand. The Paleodictyon ichnosubfacies occurs in thin- to medium-bedded sandstones (FA2) of the lower units in the Ain Ghanem and Kef Maiz sections and the lowest part of the upper unit of the Kef Maiz section, which were deposited in channel margin or foremost channel-to-levee-overbank areas. The Nereites ichnosubfacies is recorded in thin-bedded sandstones (FA2), which were deposited in crevasse-splays or small lobes on a basin floor invaded occasionally by turbidites against a background of pelagic and hemipelagic sedimentation.
    Źródło:
    Geological Quarterly; 2022, 66, 2; art. no. 1
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of catacrinid crinoid from the Lower Permian of Spitsbergen
    Autorzy:
    Gorzelak, Przemysław
    Uchman, Alfred
    Hanken, Nils−Martin
    Błażejowski, Błażej
    Powiązania:
    https://bibliotekanauki.pl/articles/2051397.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Svalbard
    crinoid
    Permian
    Źródło:
    Polish Polar Research; 2013, 2; 139-150
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Foraminiferal and calcareous nannoplankton bioevents and changes at the Late Cretaceous : earliest Paleogene transition in the northern margin of Tethys (Hyżne section, Polish Carpathians)
    Autorzy:
    Machaniec, Elżbieta Katarzyna
    Kowalczewska, Oliwia
    Jugowiec, Małgorzata
    Gasiński, M. Adam
    Uchman, Alfred
    Powiązania:
    https://bibliotekanauki.pl/articles/2060246.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    foraminifera
    nannoplankton
    bio-events
    K-Pg boundary
    Skole Nappe
    Outer Carpathians
    Opis:
    Foraminifera and calcareous nannoplankton from the Cretaceous-Paleogene (K-Pg) transition in the Hyżne section (Outer Carpathians, south-eastern Poland) show a relatively complete biostratigraphic record. Despite the absence of the Pα Zone in turbiditic deposits of the Polish Carpathians, the planktonic foraminiferal zones of the Late Cretaceous-Early Paleogene interval are well defined, including (1) the late Maastrichtian Abathomphalus mayaroensis Zone and its equivalents, (2) the earliest Danian Guembelitria cretacea second bloom Zone (P0 Zone), and (3) the top of the early Danian Parasubbotina cf. pseudobulloides (P1a) Zone. The foraminiferal events recorded in the studied section at the K-Pg transition are stratigraphically important. They include: (1) the interval with A. mayaroensis occurrence, (2) the interval with gradual disappearance of planktonic foraminifera from the most complex K-strategy forms, through the less specialized species to the large Heterohelicidae turnovers, and (3) the G. cretacea first and second blooms. Furthermore, the bloom of the opportunistic, benthic Bolivinita sp., the size reduction event, and the dissolution of the tests of the planktonic foraminifera are recorded. The K-Pg interval bioevents can be useful for better stratigraphic resolution of the flysch deposits of the Outer Carpathians. The nannoplankton event is represented by the appearance of Cruciplacolithus primus, which marks the onset of the return to more stable environmental conditions after the perturbations at the K-Pg boundary. The K-Pg boundary occurs within dark grey marly mudstones, above the upper boundary of the G. cretacea first bloom, and above the highest occurrence of the agglutinated foraminifera Goesella rugosa, at the top of the nannofossil CC 26 Zone, and below the deep-water agglutinated foraminifera (DWAF) dominance. The foraminiferal assemblages derive from different bathymetric zones corresponding to (1) the upper bathyal zone in the late Campanian (nannoplankton CC 22 Zone) and early late Maastrichtian (A. mayaroensis Zone), (2) the shelf margin in the latest late Maastrichtian (CC 26 nannoplankton Zone, G. cretacea first bloom), (3) the shelf margin in the earliest Danian (G. cretacea second bloom, Np1/2 Zone), and (4) the middle-lower bathyal depth, below a local foraminiferal lysocline and above CCD, in the latest early Danian (P. pseudobulloides Zone). As the foraminifera could have been redeposited by turbiditic currents, they do not necessarily show real bathymetric changes in the area of deposition. Such changes have not been observed in sedimentary features of the studied deposits. Foraminiferal and nannoplankton assemblages are typical of the “transitional zone” between the Tethyan and Boreal domains.
    Źródło:
    Geological Quarterly; 2020, 64, 3; 567--588
    1641-7291
    Pojawia się w:
    Geological Quarterly
    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
    Tytuł:
    Revision of the trace fossil Megagrapton Książkiewicz, 1968 with focus on Megagrapton aequale Seilacher, 1977 from the lower Eocene of the Lesser Caucasus in Georgia
    Autorzy:
    Uchman, Alfred
    Lebanidze, Zurab
    Beridze, Tamar
    Kobakhidze, Nino
    Lobzhanidze, Koba
    Khutsishvili, Sophio
    Chagelishvili, Rusudan
    Makadze, Davit
    Koiava, Kakha
    Khundadze, Nino
    Powiązania:
    https://bibliotekanauki.pl/articles/2104772.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ichnology
    flysch
    ichnotaxonomy
    graphoglyptids
    Palaeogene
    Opis:
    Megagrapton Książkiewicz, 1968 is a characteristic deep-sea trace fossil belonging to the group of graphoglyptids and mostly preserved as a network of irregular meshes in hypichnial semirelief. So far, eleven ichnospecies have been distinguished under this ichnogenus, though commonly on weak evidence. The so-far poorly known ichnospecies Megagrapton aequale Seilacher, 1977 is described here on the basis of the numerous, newly discovered specimens from deep-sea siliciclastic deposits of the Bolevani Subsuite (lower Eocene) in the Lesser Caucasus of Georgia, together with other collections and published examples. A neotype of this ichnospecies is designated and the diagnosis emended. M. aequale occurs in lower Cambrian to upper Miocene deep-sea turbiditic deposits, mostly in the Paleogene. It is characterized by relatively small, variable meshes, which have mostly irregular sub-pentagonal, sub-hexagonal or sub-heptagonal shapes that are variable in size and are bordered by curved or straight semicircular ridges. It has been mistaken for Paleodictyon, which forms regular hexagonal nets. Paleodictyon imperfectum Seilacher, 1977 is included in M. aequale as the ichnosubspecies M. a. imperfectum, which is characterized by relatively thin bordering ridges. After critical analysis of all ichnospecies, only M. irregulare Książkiewicz, 1968, M. submontanum (Azpeitia Moros, 1933), and M. aequale are recommended for further use. These are distinguished on the basis of the prevailing morphology of the meshes, irrespective of large differences in morphometric parameters within the ichnospecies. Irredictyon chaos Vialov, 1972 is included in M. irregulare as the ichnosubspecies M. i. chaos, which is characterized by relatively thick bordering ridges. Megagrapton is interpreted as a cast of a subsurface open burrow network with a few connections to the sea floor. The burrows probably functioned as a trap for small organisms (ethological subcategory irretichnia).
    Źródło:
    Geological Quarterly; 2022, 66, 1; art. no. 8
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unusual echinoid resting trace records change in the position of the redox boundary (Palaeogene of the Lesser Caucasus in Georgia)
    Autorzy:
    Uchman, Alfred
    Lebanidze, Zurab
    Kobakhidze, Nino
    Beridze, Tamar
    Makadze, Davit
    Lobzhanidze, Koba
    Khutsishvili, Sophio
    Chagelishvili, Rusudan
    Koiava, Kakha
    Khundadze, Nino
    Powiązania:
    https://bibliotekanauki.pl/articles/2172617.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ichnotaxonomy
    new ichnotaxa
    Irregular echinoids
    deep-sea
    flysch
    Redox boundary
    oxygenation
    ichnotaksonomia
    jeżowce
    muł abisalny
    flisz
    redoks
    natlenianie
    Opis:
    The first recognition of a tracemaker responding to a temporary shift in the redox boundary is recognized. This is recorded by a new trace fossil, Sursumichnus orbicularis igen. et isp. nov., which is established for mound-like structures on the upper surfaces of sandstone beds from the Borjomi Flysch (upper Paleocene–lower Eocene) in the Lesser Caucasus (Georgia). It is connected with the spatangoid echinoid burrow Scolicia de Quatrefages, 1849 and interpreted as a resting trace of the same tracemaker produced after moving up from a deeper position within the sediment. The resting is caused by an episode of unfavourable conditions related to shallowing of the redox boundary. The trace fossil is a component of the Nereites ichnofacies.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 3; 317--330
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field trip – Outer Flysch Carpathians and Pieniny Klippen Belt (PKB)
    Autorzy:
    Golonka, Jan
    Krobicki, Michał
    Wendorff, Marek
    Starzec, Krzysztof
    Siemińska, Aneta
    Olszewska, Barbara
    Wierzbowski, Andrzej
    Oszczypko, Nestor
    Salata, Dorota
    Tyszka, Jarosław
    Uchman, Alfred
    Sidorczuk, Magdalena
    Aubrecht, Roman
    Skupien, Petr
    Vašíček, Zdeněk
    Kowal-Kasprzyk, Justyna
    Waśkowska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/27323884.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Źródło:
    Geotourism / Geoturystyka; 2023, 3-4 (74-75); 5-70
    1731-0830
    Pojawia się w:
    Geotourism / Geoturystyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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