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Wyszukujesz frazę "palynomorphs" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Proliferation of abnormal palynoflora during the end-Devonian biotic crisis
Autorzy:
Filipiak, P.
Racki, G.
Powiązania:
https://bibliotekanauki.pl/articles/2059045.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Devonian-Carboniferous transition
mutation
palynomorphs
tetrads
mass extinction
volcanism
Opis:
The dispersed miospore assemblage of the Retispora lepidophyta-Verrucosisporites nitidus (LN) Zone from the Holy Cross Mountains(Poland) is marked by enrichment (above 4%) in abnormal spore morphotypes during a terrestrial flora turnover close to the Devonian-Carboniferous boundary, recorded just above the Hangenberg Black Shale level. Incomplete and complete tetrads represent mostly Vallatisporites spp., supplemented by Grandispora, Retusotriletes and Apiculiretusispora. Additional peculiar morphotypes, marked byanomalous overall shape and ornamentation, are interpreted as mutated varieties of Vallatisporites based on intermediate morphologicalstages, connecting them with this well known genus. This relatively high aberrant palynomorph frequency is accompanied by volcanicash intercalations, as well as by charcoal debris and polycyclic aromatic biomarkers indicative of forest wildfire. Thus, the anomalousspore morphology could reflect the mutagenic effect of regional acidification due to explosive volcanism. However, palynological literature data from NW France and Canada highlight the possibility of a supra-regional mutated miospore signal near the Devonian-Carboniferous boundary, and there is need for high-resolution studies of the LN Zone to examine this. The end-Permian scenario of abnormalfloral growth in immensely stressed habitats may therefore apply to other potentially volcanically-induced biotic turnovers.
Źródło:
Geological Quarterly; 2010, 54, 1; 1-14
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biostratigraphy of the Emsian to Eifelian in the Holy Cross Mountains (Poland)
Autorzy:
Fijałkowska-Mader, A.
Malec, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059160.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Holy Cross Mountains
palynomorphs
conodonts
ostracods
foraminifers
biostratigraphic correlation
Opis:
The paper give a biostratigraphic interpretation of the Emsian to Eifelian in the Łysogóry and Kielce regions of the Holy Cross Mountains, based on the different groups of microfossils: miospores, conodonts, ostracods and foraminifers. Four miospore zones were identified in the uppermost Pragian, Emsian and lowermost Eifelian: Verrucosisporites polygonalis-Dibolisporites wetteldorfensis (PW), Emphanisporites annulatus-Brochotriletes bellatulus (AB), Emphanisporites foveolatus-Verruciretusispora dubia (FD) and Acinosporites apiculatus-Grandispora protea (AP). In the Łysogóry region, the Emsian and lowermost Eifelian comprises four cono-dont zones: serotinus,patulus,partitus and costatus, three ostracod assemblages and several foraminifer assemblages. In the Kielce region, deposits from the Emsian/Eifelian boundary interval yield conodonts from the patulus and partitus zones, two ostracod assemblages and assemblages of agglutinated foraminifers. The joint biostratigraphic analysis allows a tentative correlation of the lithostratigraphic units from both areas. It also provides independent control/calibration on the different biostratigraphical systems. The Pragian/Emsian boundary is located in the lower part of the Barcza Formation and in the lower part of the Haliszka Formation, whereas the Emsian/Eifelian boundary lies in the upper part of the Grzegorzowice Formation and in the upper part of the Winna Formation.
Źródło:
Geological Quarterly; 2011, 55, 2; 109-138
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early Jurassic dinosaur-dominated track assemblages, floristic and environmental changes in the Holy Cross Mountains region, Poland
Autorzy:
Pacyna, Grzegorz
Ziaja, Jadwiga
Barbacka, Maria
Pieńkowski, Paweł
Jarzynka, Agata
Niedźwiecki, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2201217.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Mesozoic
ecosystems
tetrapod tracks
plant macrofossils
palynomorphs
trace fossils
Opis:
The Early Jurassic succession of the Holy Cross Mountains region in Poland offers a rare opportunity to study ecosystem complexity during the evolution and diversification of early dinosaurs, especially herbivorous ones. The section consists of continental and coastal deposits containing fossil assemblages spanning nearly 25 My of changes in terrestrial plants and some groups of invertebrates and tetrapods. Based on macrofossils and pollen and spores, the broader characteristics of the flora in this succession are presented. The floral assemblages show typical Early Jurassic characteristics and contain lycopsids, sphenopsids, ferns, cycadaleans, bennettitaleans, gnetaleans and ginkgoaleans, as well as conifers, and are similar to other Hettangian–Toarcian floral successions in Europe, showing the presence of a vast coniferous forest dominated by Hirmeriella in the early Hettangian, replaced by ginkgophyte-dominated floras in younger stages and araucarian conifer-dominated forests in the late Pliensbachian. Dinosaurs are documented mainly from their trace fossils (tracks and coprolites). Six distinct track assemblages (stratigraphically separated ichnoassemblages) of different ages can be identified. Current evidence indicates that while Anomoepus tracks are abundant throughout the long Hettangian–late Pliensbachian interval, medium-sized to large ornithischian tracks do not occur below the lower–middle Hettangian transition zone, associated with the first major marine transgression in the region. Hettangian strata with different theropod tracks (Grallator, Anchisauripus, Eubrontes, Kayentapus, cf. Megalosauripus), small Anomoepus tracks, numerous medium-sized Anomoepus-like tracks, Moyenisauropus tracks, tetradactyl tracks of sauropodomorphs (cf. Pseudotetrasauropus) and oval-shaped tracks of sauropods (Parabrontopodus) significantly contrast with the higher part of the Lower Jurassic succession (upper Pliensbachian Drzewica Formation and middle–upper Toarcian Borucice Formation) containing new types of medium-sized to large theropod tracks (Therangospodus), small and medium-sized bird-like tridactyl tracks (cf. Trisauropodiscus, cf. Anomoepus), exceptionally large, oval-shaped sauropod tracks (Sauropoda indet.), and new types of medium-sized and large ornithischian tracks (cf. Deltapodus, cf. Anomoepus). This points to a noticeable difference between the Hettangian and late Pliensbachian–Toarcian dinosaur ichnofaunas and may facilitate the study of regional and global changes and correlations. Both the palaeofloras and dinosaur trace fossils document ecosystem diversity and ecosystem changes, presented here in review form. The nature of these changes requires more detailed study, but preliminary results suggest the occurrence of rather complex and pronounced transformations in the dinosaur communities of the Holy Cross Mountains region. Based on our observations, the most significant event in Early Jurassic ecosystems took place within the Hettangian (change in floristic composition, the emergence of new groups of dinosaurs), but we also found what we believe to be a record of a major faunal turnover across the late Pliensbachian–middle–late Toarcian interval.
Źródło:
Geological Quarterly; 2022, 66, 3; art. no. 29
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Środowiska sedymentacji i palinofacje kredy dolnej w otworach wiertniczych Ciechocinek IG 3, Mszczonów IG 1 i Korabiewice PIG 1
Lower Cretaceous sedimentary environments and palynofacies in the Ciechocinek IG 3, Mszczonów IG 1 and Korabiewice PIG 1 boreholes
Autorzy:
Leszczyński, K.
Waksmundzka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2062478.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
palinomorfy
palinofacje
profilowanie sedymentologiczne
środowiska sedymentacji
kreda dolna
niecka płocka
palynomorphs
palynofacies
sedimentological logging
sedimentary environments
Lower Cretaceous
Płock Trough
Opis:
Na podstawie badań litologicznych, profilowań sedymentologicznych oraz analiz palinologicznych rozpoznano środowiska sedymentacji i palinofacje kredy dolnej w otworach wiertniczych Ciechocinek IG 3, Mszczonów IG 1 i Korabiewice PIG 1. Wykonano dokładną analizę spektrum palinologicznego – stosunku zawartości planktonu do całości palinomorf, ilości fitoklastów w całkowitym kerogenie oraz zawartości materii organicznej. W celu scharakteryzowania palinofacji w analizowanych otworach przeprowadzono korelacje danych palinologicznych z wynikami profilowań sedymentologicznych oraz z obserwacjami litofacjalnymi i paleogeograficznymi. Wyniki badań pozwoliły na ogólne rozpoznanie środowisk sedymentacji i palinofacji w strefie depozycji węglanowo-silikoklastycznej oraz w strefie aktywnej poduszki solnej. Na podstawie zebranego materiału, w nawiązaniu do określonego w badaniach palinofacjalnych spektrum palinologicznego, w profilu kredy dolnej wydzielono następujące środowiska morskie: odbrzeża, przybrzeża dolnego–środkowego, płytkiej zatoki morskiej, laguny i płytkiego szelfu węglanowo-silikoklastycznego. W przypadku braku jednoznacznych cech diagnostycznych środowisko sedymentacji określono jako ogólnie morskie.
Based on lithological and sedimentological logging and palynological analysis, sedimentary environments and palynofacies were identified in the Lower Cretaceous of the Ciechocinek IG 3, Mszczonów IG 1 and Korabiewice PIG 1 boreholes. A thorough analysis of the palynological spectrum was performed, determining the ratio between the amount of palynomorphs and the total of plankton, the amount of phytoclasts in the total kerogen, and the content of organic matter. Palynological data were correlated with sedimentological, lithofacies and paleogeographical data. The research resulted in a general recognition of sedimentary environments and palynofacies in the carbonate-clastic deposition zone and in a zone of an active salt pillow. The following sedimentary environments were identified in the Lower Cretaceous sediments, based on the analysed material and with regard to the palynological spectrum: offshore, lower–middle shoreface, embayment, lagoon and shallow carbonate-siliciclastic shelf. In case of the absence of diagnostic features for exact determination of sedimentary environments, the environments were defined as generally marine.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2014, 457; 1--14
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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