Organic-walled dinoflagellate cysts from the Bathonian ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland – a palaeoenvironmental approach

Czasopismo : Acta Geologica Polonica
Tytuł artykułu : Organic-walled dinoflagellate cysts from the Bathonian ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland – a palaeoenvironmental approach

Autorzy :
Gedl, P.
Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, 31-002 Kraków, Poland, ndgedl@cyf-kr.edu.pl,
Leonowicz, P.
Institute of Geology, University of Warsaw, Al. Żwirki i Wigury 93, PL-02-089 Warszawa, Poland, Paulina.Leonowicz@uw.edu.pl,
Dudek, T.
Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, PL-31-002 Kraków, Poland, tereska_wing@yahoo.co.uk,
Witkowska, M.
Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, PL-30-063 Kraków, Poland, magda.witkowsky@interia.pl,
Gedl, P.
Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, 31-002 Kraków, Poland, ndgedl@cyf-kr.edu.pl,
Boczarowski, A.
Faculty of Earth Sciences, University of Silesia, Będzińska 60, PL-41-200 Sosnowiec, Poland, a.boczarowski@chello.pl,
Kaim, A.
Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland ; Bayerische Staatssammlung fur Palaontologie und Geologie, Richard-Wagner-Str. 10, 80333 Munchen, Germany, kaim@twarda.pan.pl,
Kaim, A.
Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland ; Bayerische Staatssammlung fur Palaontologie und Geologie, Richard-Wagner-Str. 10, 80333 Munchen, Germany, kaim@twarda.pan.pl,
Rees, J.
Soldattorpet 48, SE-653 50 Karlstad, Sweden,
Smoleń, J.
Polish Geological Institute, Rakowiecka 4, 00-975 Warszawa, Poland, jolanta.smolen@pgi.gov.pl,
Kędzierski, M.
Jagiellonian University, Institute of Geological Sciences, Oleandry Str. 2a, PL-30-063 Kraków, Poland, mariusz.kedzierski@uj.edu.pl,
Gedl, P.
Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, 31-002 Kraków, Poland, ndgedl@cyf-kr.edu.pl,
Abstrakty : A succession of Middle-Upper Bathonian (Subcontractus.Retrocostatum zones) ore-bearing clays exposed at Gnaszyn has been investigated for the presence of dinoflagellate cysts. The assemblages are dominated by Ctenidodinium. However, analysis of diversity shows some subtle differences throughout the succession, possibly related to the palaeoenvironmental conditions in the photic zone. Impoverished assemblages, dominated by Ctenidodinium, occur mainly in monotonous muddy intervals. More diverse assemblages, albeit also dominated by Ctenidodinium, occur in intervals which contain siderite concretion levels. The taxonomic composition of the former assemblage seems to reflect slightly restricted conditions in the photic zone, possibly related to a minor reduction in salinity and/or increase in nutrient availability. More diverse dinoflagellate cyst assemblages reflect periods of less intense terrigenous influx and relatively higher, possibly normal, salinity. These changes were possibly caused by variable intensity of freshwater influx into the basin, controlled by sea-level fluctuations. Sea-level changes may be related to migrations of Tethyan water masses, which were probably partly responsible for the composition of the dinoflagellate cyst assemblages.

Słowa kluczowe : Baton, dinocysty, iły rudonośne, jura środkowa, monoklina śląsko-krakowska, paleośrodowisko, Polska, Bathonian, Dinoflagellate cysts, Kraków-Silesia Homocline, Middle Jurassic, Ore-bearing clays, Palaeoenvironment, Poland,
Wydawnictwo : Faculty of Geology of the University of Warsaw
Rocznik : 2012
Numer : Vol. 62, no. 3
Strony : 439 – 461
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DOI :
Cytuj : Gedl, P. ,Leonowicz, P. ,Dudek, T. ,Witkowska, M. ,Gedl, P. ,Boczarowski, A. ,Kaim, A. ,Kaim, A. ,Rees, J. ,Smoleń, J. ,Kędzierski, M. ,Gedl, P. , Organic-walled dinoflagellate cysts from the Bathonian ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland – a palaeoenvironmental approach. Acta Geologica Polonica Vol. 62, no. 3/2012
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