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Wyświetlanie 1-15 z 32
Tytuł:
Jurassic liverworts from Mount Flora, Hope Bay, Antarctic Peninsula
Autorzy:
Ociepa, Anna Maria
Powiązania:
https://bibliotekanauki.pl/articles/2051860.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
Jurassic
palaeobotany
liverworts
Schizolepidella
Źródło:
Polish Polar Research; 2007, 1; 31-36
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phosphoritization in a starved shallow shelf environment: the Brentskardhaugen Bed (Toarcian-Bajocian) in Spitsbergen
Autorzy:
Krajewski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2052872.pdf
Data publikacji:
1990
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
Jurassic
sedimentology
condensed phosphorite
Źródło:
Polish Polar Research; 1990, 11, 3-4; 331-344
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mesozoic gastropods from Siberia and Timan (Russia). Part 2: Neogastropoda and Heterobranchia
Autorzy:
Kaim, Andrzej
Beisel, Alexander L.
Powiązania:
https://bibliotekanauki.pl/articles/2052039.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Siberia
Timan
Jurassic–Cretaceous
paleontology (gastropods)
taxonomy
Źródło:
Polish Polar Research; 2005, 26, 1; 41-64
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spesia antarctica gen. et sp. nov. - a new fertile fern spike from the Jurassic of Antarctica
Autorzy:
Ociepa, Anna Maria
Barbacka, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2051566.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic Peninsula
Mount Flora Formation
Jurassic
palaeobotany
plantreproductive organ
Źródło:
Polish Polar Research; 2011, 1; 59-66
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evidence that the fossil insect trackway Bifurculapes laqueatus Hitchcock, 1858 was made underwater
Autorzy:
Getty, Patrick R.
Powiązania:
https://bibliotekanauki.pl/articles/138699.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aquatic
ichnology
arthropods
mesozoic
Jurassic
wodny
ichnologia
stawonogi
mezozoik
jura
Opis:
Three trackways attributable to the ichnospecies Bifurculapes laqueatus Hitchcock, 1858 found in Lower Jurassic rocks of the Newark Supergroup in northeastern North America are preserved in association with current lineations. Each trackway takes turns so that parts of the trackway parallel the current lineations. This parallelism is interpreted as evidence that the trackmakers were entrained in flowing water and had to change course due to the current. If this interpretation is correct, then morphological differences between B. laqueatus and terrestrial insect trackways could be explained by the trackmaker moving subaqueously. Further, B. laqueatus would constitute only the second insect trackway from this region to be recognized as being made subaqueously. From an ecological standpoint, the aquatic insects that made B. laqueatus were probably near the base of the local food chain, the apex predators of which were piscivorous theropod dinosaurs.
Źródło:
Acta Geologica Polonica; 2020, 70, 1; 125-133
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Catagenic ankerite replacing biogenic calcite in the Marhřgda Bed (Jurassic), Sassenfjorden, Spitsbergen
Autorzy:
Krajewski, Krzysztof P.
Powiązania:
https://bibliotekanauki.pl/articles/2052128.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
Jurassic
Marhøgda Bed
ankerite
palaeotemperatures
burial diagenesis
hydrocarbon generation
Źródło:
Polish Polar Research; 2002, 23, 1; 1-15
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon and oxygen isotopic survey of diagenetic carbonate deposits in the Agardhfjellet Formation (Upper Jurassic), Spitsbergen: preliminary results
Autorzy:
Krajewski, Krzysztof P.
Powiązania:
https://bibliotekanauki.pl/articles/2052060.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
Agardhfjellet Formation (Jurassic)
diagenetic carbonate deposits
carbon and oxygen isotopes
Źródło:
Polish Polar Research; 2004, 25, 1; 27-44
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagenetic origin of carbonate in the Marhøgda Bed (Jurassic) in Spitsbergen, Svalbard
Autorzy:
Krajewski, Krzysztof P.
Łącka, Bożena
Kuźniarski, Michał
Orłowski, Ryszard
Prejbisz, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2052404.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Svalbard
Spitsbergen
Jurassic
Marhegda Bed
early diagenesis
burial diagenesis
carbonate minerals
palaeotemperatures
Źródło:
Polish Polar Research; 2001, 22, 2; 89-128
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A monograph of the Polish Oxfordian echinoids: Part 2, Subclass Euechinoidea Bronn, 1860
Autorzy:
Radwańska, U.
Powiązania:
https://bibliotekanauki.pl/articles/139022.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Euechinoidea
taxonomy
Hemicidaris
Trochotiara
Juvenile echinoids
Upper Jurassic
Polska
taksonomia
jura
Polska
Opis:
The non-cidaroid echinoids (subclass Euechinoidea Bronn, 1860) from the Oxfordian epicontinental sequence of Poland (Polish Jura, Holy Cross Mountains, Mid-Polish Anticlinorium) are assigned to the genera Hemipedina Wright, 1855, Hemicidaris L. Agassiz, 1838, Hemitiaris Pomel, 1883, Pseudocidaris Étallon, 1859, Stomechinus Desor, 1856, Eucosmus L. Agassiz in Agassiz and Desor, 1846, Glypticus L. Agassiz, 1840, Pleurodiadema de Loriol, 1870, Diplopodia McCoy, 1848, Trochotiara Lambert, 1901, Desorella Cotteau, 1855, and Heterocidaris Cotteau, 1860, plus one acropeltid taxon, and one taxon left in open nomenclature. Within the genus Hemicidaris L. Agassiz, 1838, the relationship between Hemicidaris intermedia (Fleming, 1828), Hemicidaris crenularis L. Agassiz, 1839 [non Lamarck, nec Goldfuss] and Hemicidaris quenstedti Mérian, 1855, all with confused taxonomy, is discussed. Based on test structure, the genera Polydiadema Lambert, 1883, and Trochotiara Lambert, 1901, of the family Emiratiidae Ali, 1990, are proved to be separate; the common species mamillana of F.A. Roemer (1836) is a typical Trochotiara. An attention is paid to the morphology of the tiny, juvenile specimens, common in Eucosmus decoratus L. Agassiz in L. Agassiz and Desor, 1846, and in Pleurodiadema stutzi (Moesch, 1867).
Źródło:
Acta Geologica Polonica; 2014, 64, 3; 352-349
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Triassic-Jurassic flora of Poland; floristical support of climatic changes
Autorzy:
Barbacka, M.
Pacyna, G.
Feldman-Olszewska, A.
Ziaja, J.
Bodor, E.
Powiązania:
https://bibliotekanauki.pl/articles/138615.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Triassic
Jurassic
Polska
macroflora
Desmiophyllum harrisii sp. nov.
palaeoclimate
trias
jura
Polska
mikroflora
paleoklimat
Opis:
Plant macroremains from five boreholes in Poland were studied. Two of them (Huta OP-1 and Studzianna) from the northern margin of the Holy Cross Mountains, yielded several taxa. In the other three boreholes determinable fossil plants were sporadic, albeit important. Most of the taxa from the Huta OP-1 and Studzianna boreholes are typical of the European Early Jurassic (Hettangian and Sinemurian). Both localities, although close to one another, show quite different taxonomic floral compositions. The Huta OP-1 flora is fern-dominated with the presence of ginkgophytes and conifers (a new species incertae sedis, Desmiophyllum harrisii Barbacka et Pacyna is herein proposed), which would suggest rather wet and warm conditions. This flora is typical of the European Province of the Euro-Sinian Region. In Studzianna the Siberian elements dominate, gymnosperms, mainly Czekanowskiales, which indicate a drier and colder environment.The palaeobotanical data correspond to the results of clay mineral studies, in particular the kaolinite/illite ratio in the source formations. The kaolinite content confirms a decrease in temperature and a reduction in rainfall in the late Early Hettangian and the latest Hettangian in the area.
Źródło:
Acta Geologica Polonica; 2014, 64, 3; 281-309
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asteroidea from the lower Kimmeridgian of Wapienno/Bielawy, Kuyavia region, north-central Poland
Autorzy:
Loba, Michał
Radwańska, Urszula
Powiązania:
https://bibliotekanauki.pl/articles/2023989.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Asteroidea
taxonomy
Upper Jurassic
Lower Kimmeridgian
Polska
rozgwiazda
taksonomia
jura górna
dolny kimeryd
Polska
Opis:
A relatively rich assemblage of starfish is recognised from the talus facies of an Upper Jurassic (lower Kimmeridgian) biohermal, sponge-cyanobacterial build-up from the Wapienno/Bielawy succession exposed in a salt-dome anticline in Kuyavia region, north-central Poland. The paper presents 8 taxa belonging to 4 genera (one new to science): Boxaster gen. nov., Noviaster Valette, 1929, Tylasteria Valette, 1929, Valettaster Lambert, 1914, and 4 families: Astropectinidae Gray, 1840, Goniasteridae Forbes, 1841, Sphaerasteridae Schöndorf, 1906 and Stauranderasteridae Spencer, 1913. Only a very few representatives of some of these taxa have formerly been reported from the Jurassic of Poland. Two species are new: Valettaster planus sp. nov. and Boxaster wapienensis gen. et sp. nov. The Jurassic starfish assemblage recognised from the Wapienno/Bielawy succession is interpreted as an offshore starfish fauna with the admixture of allochtonous shallow-water taxa. The lithology of the source deposits indicates their transport by storm agitation and/or mass movements. This fact strongly influenced the preservation state, all collected plates being disarticulated and most of them abraded.
Źródło:
Acta Geologica Polonica; 2022, 72, 1; 89--106
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pinnidae (Bivalvia) from the Reuchenette Formation (Kimmeridgian, Upper Jurassic) of northwestern Switzerland
Autorzy:
Koppka, J.
Powiązania:
https://bibliotekanauki.pl/articles/138674.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
taxonomy
Bivalvia
Pinnidae
Pinna (Cyrtopinna)
Stegoconcha
Kimmeridgian
Jurassic
Switzerland
taksonomia
małże
kimeryd
jura
Szwajcaria
Opis:
The shallow-marine carbonate deposits of the Reuchenette Formation (Kimmeridgian, Upper Jurassic) in northwestern Switzerland and adjacent France yield highly diverse bivalve associations, but only rarely contain remains of pinnid bivalves. The three occurring taxa Pinna (Cyrtopinna) socialis d’Orbigny, 1850, Stegoconcha granulata (J. Sowerby, 1822) and Stegoconcha obliquata (Deshayes, 1839) have been revised. A lectotype for Pinna (C.) socialis was designated and the taxon is assigned herein to P. (Cyrtopinna) Mörch, 1853, the first record of the subgenus from the Jurassic. A brief review of Stegoconcha Böhm, 1907 revealed two species groups within the genus. Species close to the type species S. granulata are characterized by a nearly smooth anterior shell, followed posteriorly by deep radial furrows and rows of pustules covering the dorsal flank. Another group comprises radially ribbed species related to S. neptuni (Goldfuss, 1837). It includes among others the Paleogene species S. faxensis (Ravn, 1902), extending the known range of Stegoconcha from the Middle Jurassic into the Paleogene. The paper suggests a relationship between Stegoconcha and the Cretaceous Plesiopinna Amano, 1956, with S. obliquata as a possible intermediate species leading to Plesiopinna during the Early Cretaceous. Furthermore, a possible relationship between Stegoconcha and Atrina Gray, 1842 is discussed.
Źródło:
Acta Geologica Polonica; 2018, 68, 1; 21-51
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High (ultrahigh) pressure metamorphic terrane rocks as the source of the detrital garnets from the Middle Jurassic sands and sandstones of the Cracow Region (Cracow-Wieluń Upland, Poland)
Autorzy:
Meres, S.
Aubrecht, R.
Gradziński, M.
Sykora, M.
Powiązania:
https://bibliotekanauki.pl/articles/139271.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analiza proweniencji
jura
Polska Platforma
detrital garnets
detrytyczne granaty
Jurassic
Polish platform
provenance analysis
Opis:
The Middle Jurassic (Upper Bathonian/Lower Callovian) sands and sandstones of the Cracow.Wieluń Upland contain detrital garnets with high contents of the pyrope molecule (30.73 mol %). The predominance of detrital pyrope garnets, and inclusions represented mainly by omphacite and kyanite, show that the garnets were derived from high (ultrahigh) pressure (H/UHP) metamorphic terrane rocks (garnet peridotites, eclogites and granulites). Their source is unknown. The Moldanubian Zone of the Bohemian Massif is closely comparable. However, the terranes between this zone and the Cracow-Wieluń Upland are dominated by almandine garnets. The relatively low proportion of almandine garnets in the examined samples indicates that transport of the detrital material could not have been from a far distant source as the garnet assemblage would otherwise be strongly dominated by almandine. A less distant possible source could have been the Góry Sowie Mts., which incorporate UHP/HP metamorphic rocks, but the exposed areal extent of these rocks is too small. It is possible that larger portions of these metamorphic rocks are buried beneath the Cenozoic cover and might have earlier represented a larger source area. Reworking of the entire heavy mineral spectra from older clastics is improbable because of the low maturity of the heavy mineral assemblages (higher proportion of less stable minerals). The source area therefore remains unknown. Most probably it was formed by primary crystalline complexes of lower crust to mantle origin, outcrops of which were not far distant from the area of deposition. Similar detrital garnet compositions were also recorded in the Outer Western Carpathians (Flysch Zone, Pieniny Klippen Belt), i.e. the crustal segments which formed the Silesian and Magura cordilleras; the Czorsztyn Swell was also formed by similar rocks.
Źródło:
Acta Geologica Polonica; 2012, 62, 2; 231-245
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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