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Wyświetlanie 1-5 z 5
Tytuł:
Ząb morskiego krokodylomorfa z jury Wyżyny Krakowsko-Częstochowskiej
A tooth of a marine crocodylomorph from the Jurassic of the Cracow-Czestochowa Upland
Autorzy:
Zatoń, M.
Powiązania:
https://bibliotekanauki.pl/articles/2074514.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
krokodylomorf
metriorynchidy
zęby
Polska
Crocodylomorpha
Metriorhynchidae
teeth
Polska
Opis:
An incomplete tooth-crown showing the features characteristic of marine crocodylomorphs of the family Metriorhynchidae has been found in glauconitic marls from the uppermost Callovian/lowermost Oxfordian of Ogrodzieniec, situated in the southern part of the Cracow-Czestochowa Upland. The precise taxonomic identification is not possible, but to date only the genus Metriorhynchus has been known from the Callovian. This is the first evidence of Metriorhynchidae in the Cracow-Czestochowa Upland (Polish Jura Chain).
Źródło:
Przegląd Geologiczny; 2007, 55, 11; 961-964
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mikrokonchidy - mało znana grupa kopalnych organizmów i ich występowanie w górnym karbonie Górnego Śląska
Microconchids - a little known group of Carboniferous of the Upper Silesia fossil organisms and their occurrence in the Upper
Autorzy:
Zatoń, M.
Mazurek, D.
Powiązania:
https://bibliotekanauki.pl/articles/2074846.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Spirorbis
mikrokonchidy
Tentaculita
karbon
Polska
Microconchida
Carboniferous
Polska
Opis:
The present article concerns a characteristics of enigmatic encrusting organisms of the order Microconchida (microconchids), similar to polychaetes of the genus Spirorbis, as well as a description of their finds from the Upper Carboniferous of the Upper Silesia region, southern Poland. The microconchids described here may represent the genus Microconchus. Most of the individuals encrust terrestrial flora and bivalve shells, and thus they certainly inhabited freshwater or, at most, brackish water environment. Similarly as the Recent polychaetes of the genus Spirorbis, the microconchids described here occur in association composed of both adult and juvenile individuals. The juveniles, however, dominate, what may indicate they have died due to some stress conditions (high rate of deposition and/or low oxygen content in the water). The microconchids are poorly-preserved. The original calcitic mineralogy of their tubes was replaced by phases similar to lead sulfide and dolomite.
Źródło:
Przegląd Geologiczny; 2011, 59, 2; 157-162
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Framboidy pirytowe jako wskaźniki paleośrodowiska
Pyrite framboids as paleoenvironmental indicators
Autorzy:
Zatoń, M.
Rakociński, M.
Marynowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/2074589.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
framboidy pirytowe
redoks
warunki środowiskowe oksyczne
warunki środowiskowe dysoksyczne
warunki środowiskowe euksyniczne
jura
dewon
Polska
pyrite framboids
redox
euxinia
anoxia
dysoxia
Jurassic
Devonian
Polska
Opis:
The problemof application of pyrite framboids in reconstructions of the redox conditions is presented. The characteristics of pyrite framboids, their origin and principles of application in paleoenvironmental interpretations are given. The pyrite framboid diameter distribution as indicators of redox conditions was presented on the examples of the Middle Jurassic (Upper Bajocian-Lower Bathonian) ore-bearing clays of the Polish Jura, and Upper Devonian (Middle and Upper Famennian) dark grey and black shales from Kowala (Holy Cross Mountains). It has been shown, that during the sedimentation of the ore-bearing clays, the pyrite framboids formed in the sediment, below the oxic water column; however, some episodic oscillation around the dysoxic conditions cannot be entirely excluded. During the sedimentation of the Middle Famennian dark grey shales, the redox conditions at the sea-floor oscillated around dysoxia. In both examples, the framboids are characterized by wide range of their diameters and the presence of large, >10 "my"m, framboids. On the contrary, the Upper Famennian black shales, representing the Hangenberg event, were deposited below the euxinic conditions in the water column. It is indicated by a high frequency of small-size framboids, far below 6 "my"m in diameter, and the lack of the large ones. The overlying shales, on the other hand, show the transition to more oxic conditions. The redox conditions interpreted above are in agreement with the independent biomarker analyses and paleontological observations.
Źródło:
Przegląd Geologiczny; 2008, 56, 2; 158-164
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konkrecje hiatusowe z iłów rudonśnych Wyżyny Krakowsko-Częstochowskiej
Hiatus concretions fromthe ore-bearing clays of the Cracow-Czestochowa Upland (Polish Jura)
Autorzy:
Zatoń, M.
Marynowski, L.
Bzowska, G.
Powiązania:
https://bibliotekanauki.pl/articles/2074474.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
konkrecje hiatusowe
Wyżyna Krakowsko-Częstochowska
hiatus concretions
Middle Jurassic
Cracow-Częstochowa Upland
borers
encrusters
Opis:
Hiatus concretions are arly-diagenetic sedimentary bodies, which in their history of formation, underwent exhumation during sedimentation break and/or erosion of sea-floor. Then they were colonized by various encrusters and borers, before they were buried again. Within Middle Jurassic (Bajocian through Bathonian) clays, hiatus concretions occur in four localities in the Cracow-Częstochowa Upland (south and central Poland): Ogrodzieniec, Bugaj, Mokrsko and Krzyworzeka. Preliminary data about their mineralogy, organic geochemistry and palaeoecology is given. Mineralogical analyses showed, that except dominant high Mg-calcite (up to 87.10% of total carbonates), concretions possess minor amounts of such compounds as quartz, clay minerals (kaolinite and illite), pyrite, siderite or Mg-kutnahorite. However, high differences are observed between total organic carbon contents of concretions (TOC=0.46%) and surrounded clays (TOC = 2.16%), but their molecular composition is similar. Most of identified biomarkers are of terrestrial origin. In clay lithology, the hiatus concretions are the only sedimentary bodies that clearly mark the sedimentation pauses (hiatuses). In the investigated area, they form more or less continuous horizons. The concretions are calcitic, possessing various encrusting fauna such as bryozoans, oysters and oyster-like bivalves, serpulids, solitary corals and foraminifers. They often post-date the borings, belonging to such ichnogenera as Gastrochaenolites, Trypanites and Entobia. Some of the nodules show distinct transition from firmground (characterized by the presence of Glossifungites ichnocoenosis) to hardground (presence of Trypanites ichnocoenosis), pointing to the fact, that they formed at, or very close to, the sediment-water interface. Some concretions, like those from Bugaj and Mokrsko, are characterized by their high diversity of hard bottom communities. Those concretions are also irregular in shape; others, like those from Ogrodzieniec and Krzyworzeka, possess lower diversity. The concretions from Krzyworzeka are especially dominated by the borers, while the encrusters are sparse and not diverse. Those nodules that are wide and flat tend to be more bored on one surface only, while those that are more roundish, are bored on both sides more evenly. The degree of diversity is probably correlated with physical disturbance, causing the rolling and overturning of the exhumed concretions in the littoral zone. On the other hand, the overall diversity could be lowered due to destructive abrasion either of the shallowest borings, echinoid/gastropod scratch marks and shells of nestling bivalves, as well as more delicate epilithozoans.
Źródło:
Przegląd Geologiczny; 2006, 54, 2; 131-138
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gniazdowe akumulacje szczątków fauny w środkowojurajskich iłach rudonośnych Wyżyny Krakowsko-Częstochowskiej-wnioski paleobiologiczne
Nest-like accumulations of faunal remains in the Middle Jurassic ore-bearing clays of the Kraków-Czestochowa Upland and their palaeobiological implications
Autorzy:
Zatoń, M.
Salamon, M. A.
Marynowski, L.
Zatoń, R.
Powiązania:
https://bibliotekanauki.pl/articles/2074537.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
średnia Jura
Polska
fragmenty skorup
szczątki organiczne
Middle Jurassic
Polska
predation
shell fragments
shelly fossils
Opis:
Distinct faunal accumulations in the uppermost Bajocian/lowermost Bathonian, lowermost and Middle Bathonian of the Polish Jura (south-central Poland) have been detected. The fossils are densely packed in the centre of the accumulations and more or less dispersed in their margins. The accumulations vary in size, but all are rich in various groups of organisms, of which the molluscs (mainly bivalves) and echinoderms predominate. The echinoderms are all disarticulated, and shelly fauna occur as angular fragments with sharp edges, of random sizes and without any signs of abrasion. The different sizes of the fossil remains, from tiny echinoderm ossicles or juvenile shelly fauna to medium-sized shell fragments or belemnite rostra, exclude any transportation and thus sorting. Worth of noting is the occurrence of similar faunal groups in each accumulation. The general shape and composition of the accumulations, as well as their taphonomical features, especially the angularity of shell fragments, point to durophagous (shell-crushing) predation rather than physical processes. The various organisms may indicate that the potential predator (most probably fish) fed on various invertebrates. The indigestible particles were later regurgitated forming the accumulations discussed. The presence of various epibionts on the fossil fragments indicate,that they rested upon the sea-floor for some time-span after they had been regurgitated. Then the scavengers, as well as current action or water movements, have been responsible for dispersion of some of the fossils, as is well-visible at the margins of the investigated accumulations..
Źródło:
Przegląd Geologiczny; 2007, 55, 5; 424-429
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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