Temat: Bathonian - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A preliminary report on dinosaur track assemblages from the Middle Jurassic of the Imilchil area, Morocco
Autorzy:: Gierliński, G. D.
Menducki, P.
Janiszewska, K.
Wicik, I.
Boczarowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/2059246.pdf
Data publikacji:: 2009
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: dinosaur tracks
Bathonian
Bajocian
Central High Atlas
Morocco
Opis:: Dinosaur tracks are reported from three new localities near Imilchil, in the Central High Atlas of Morocco. New dinosaur track assemblages are recognized in Bathonian and Bajocian beds. The Bathonian track assemblage comprises theropod, sauropod and ornithopod footprints. The Bajocian deposits contain a sauropod-thyreophoran track assemblage.
Źródło:: Geological Quarterly; 2009, 53, 4; 477-482
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Palaeoenvironmental reconstruction of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
Autorzy:: Gedl, P.
Kaim, A.
Leonowicz, P.
Boczarowski, A.
Dudek, T.
Kędzierski, M.
Rees, J.
Smoleń, J.
Szczepanik, P.
Sztajner, P.
Witkowska, M.
Ziaja, J.
Powiązania:: https://bibliotekanauki.pl/articles/138742.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: beton
iły rudonośne
jura
paleośrodowisko
Polska
Bathonian
Jurassic
ore-bearing clays
palaeoenvironment
Polska
Opis:: Multidisciplinary studies of the Middle-Upper Bathonian ore-bearing clays at Gnaszyn revealed variable palaeoenvironmental conditions during the deposition of this seemingly monotonous sequence. We interpret the conditions in the bottom environment and the photic zone, and also evaluate the influence of the adjacent land areas, based on sedimentology, geochemistry, sporomorphs and palynofacies composition, benthic (foraminifera, gastropods, bivalves, scaphopods, echinoderms), planktonic (calcareous nannoplankton, dinoflagellate cysts), and nektonic (sharks) fossils. The Gnaszyn succession originated relatively close to the shore, within reach of an intense supply of terrestrial fine clastic and organic particles. The latter are mainly of terrestrial origin and range from 1.5 to 2.5 wt.%. The precise water depth is difficult to estimate but most likely ranges from several tens of metres to a few hundred metres. All fossil groups show minor changes throughout the succession. As the climate seems to have been quite stable during this period we consider sea-level fluctuations to have been the main factor responsible for the changes. The terrestrial input, including freshwater and land-derived clastic and organic particles (sporomorphs and cuticles), increased during periods of sea-level lowstand. As a consequence, stress conditions (lower salinity, higher nutrient availability, lower water transparency) in the photic zone caused blooms of opportunistic planktonic taxa. Furthermore, a faster sedimentation rate led to oxygen depletion and deterioration of the living conditions in the bottom environment due to an increased accumulation of organic matter. As a result, the benthic biota became taxonomically impoverished and commonly dominated by juvenile forms. During periods of high sea level, the source areas were shifted away from the basin, resulting in a decrease in the terrestrial influx, increase in the salinity of surface waters, the appearance of more diverse phytoplankton assemblages, a lower sedimentation rate, and an improvement of living conditions at the bottom.
Źródło:: Acta Geologica Polonica; 2012, 62, 3; 463-484
0001-5709
Pojawia się w:: Acta Geologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Palaeoenvironmental interpretation of echinoderm assemblages from Bathonian ore-bearing clays at Gnaszyn (Kraków-Silesia Homocline, Poland)
Autorzy:: Boczarowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/138733.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: baton
iły rudonośne
jura środkowa
paleośrodowisko
Polska
szkarłupnie
Bathonian
echinoderms
Middle Jurassic
ore-bearing clays
palaeoenvironment
Polska
Opis:: This paper presents the results of an investigation into the variability of echinoderm assemblages from Bathonian ore-bearing clays from Gnaszyn. Remains of Crinoidea, Asteroidea, Ophiuroidea, Echinoidea, and Holothuroidea have been studied from 38 rock samples. The most common echinoderms represented are the crinoids Balanocrinus berchteni and Chariocrinus andreae and a few species of the holothurian genera Priscopedatus, Calclamna, Staurocaudina, Eocaudina, Achistrum, Theelia and Hemisphaeranthos. The echinoderms from Gnaszyn show various life strategies: benthic or epibenthic forms, sessile sestonophages (Crinoidea), motile macrophages (Asteroidea) and detritivores (Asteroidea, Ophiuroidea, Echinoidea), infaunal and epifaunal detritus feeders, sediment feeders or rake-feeders (Holothuroidea). Their presence suggests well oxygenated and presumably relatively cold bottom marine waters. The parts of the Gnaszyn section around concretion horizons and characterized by the ubiquitous occurrence of the holothurian Theelia and echinoids were deposited during phases of optimal living conditions with sufficient influx of plant detritus and good oxygenation of the sea bottom. These parts commonly host echinoderm associations dominated by crinoid remains, which occasionally are still articulated (or disarticulated but remaining intact) - this points to a quiet environment with normal oxygenation of the bottom waters but anaerobic/dysaerobic conditions in the sediment.
Źródło:: Acta Geologica Polonica; 2012, 62, 3; 351-366
0001-5709
Pojawia się w:: Acta Geologica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Pedicellarie ze środkowojurajskich iłów rudonośnych i ich znaczenie w strategii życiowej jeżowców
Pedicellariae from Middle Jurassic Ore Bearing Częstochowa Clay Formation and their significance in echinoids life strategy
Autorzy:: Boczarowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/2077294.pdf
Data publikacji:: 2004
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: taksonomia
anatomia
paleośrodowisko
jura
bajos
baton
centralna Polska
iły rudonośne
taxonomy
anatomy
paleoenvironment
Jurassic
Bajocian
Bathonian
Central Poland
pedicellariae
ore bearing
Opis:: Numerous, well-preserved globiferous and ophiocephalous pedicellariae of echinoids have been found in samples from several brickyards of Central Poland: Gnaszyn and Kawodrza (Częstochowa), Blanowice (Zawiercie), Wrzosowa. This is the first study of the uppermost Bajocian and Bathonian pedicellariae from the Ore Bearing Częstochowa Clay Formation. Four new morphotypes are described. Effectiveness of the defensive echinoid strategy is discussed; the structures observed indicate the presence of poison in some but not all spines and pedicellariae of both living and fossil species. All main morphological types of pedicellariae are compared. Morphotype I of globiferous pedicellariae and morphotype III of ophiocephalous pedicellariae are similar to those from the recent family Parechinidae. Jurassic echinoid Pelanechinus has ophiocephalous pedicellariae reminding morphotype II, as described from the Polish Bathonian.
Źródło:: Volumina Jurassica; 2004, 2, 1; 141-150
1896-7876
1731-3708
Pojawia się w:: Volumina Jurassica
Dostawca treści:: Biblioteka Nauki

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