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2 2009

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Środkowojurajskie wapienie bulaste sukcesji czertezickiej pienińskiego basenu skałkowego Polski-fakty i kontrowersje

Krobicki M., Wierzbowski A.

Przegląd Geologiczny

2009

Vol. 57, nr 7

600-606

According to the present authors the decline of the Bajocian crinoidal limestone sedimentation in the Pieniny Klippen Basin corresponded to a general subsidence of the Czorsztyn Ridge which promoted the appearance of nodular limestones of the pelagic Ammonitico Rosso facies (Czorsztyn Limestone Fm., Niedzica Limestone Fm.). As proved by ammonite faunas recognized in the Czorsztyn, Niedzica and Czertezik successions, this replacement of the facies (sometimes related with hiatus) took place during the latest Bajocian. A different interpretation of stratigraphy of the crinoidal limestones is given by Birkenmajer (1977, 2007) who postulates a wider stratigraphical range of these deposits, in the Czertezik Succession, but also in the Czorsztyn Succession, from the Bajocian up to base or even end of the Callovian. According to this author the crinoidal limestones span in these two successions a large stratigraphical interval of the Middle Jurassic being partly a lateral equivalent of the nodular limestones of the Niedzica Limestone Fm. of the Niedzica Succession. The present authors investigations, based on new findings of ammonites (parkinsoniids—Parkinsonia (Parkinsonia) parkinsoni (Sow.), Parkinsonia cf. bomfordi Arkell), in the typical area of occurrence of the Czertezik Succession, indicate the presence of the uppermost Bajocian–lowermost Bathonian red nodular limestones of the Niedzica Limestone Formation, and along with older ammonite datings from the Czorsztyn Succession prove that the onset of sedimentation of the nodular limestones was almost coeval in the Czertezik Succession, the Czorsztyn Succession and the Niedzica Succession. Additionally, the ammonite fauna indicates that sedimentation of the crinoidal limestones in the Czertezik Succession took place during the Bajocian, similarly as in other successions of the Pieniny Klippen Belt. These new findings show that differences between the Czertezik Succession, and other successions of the Pieniny Klippen Belt are much smaller than hitherto proposed (Birkenmajer, 1959), and confirm an earlier interpretation of the present authors (Wierzbowski et al., 2004).

Jurajskie utwory sukcesji czertezickiej profilu Góry Zamkowej masywu Trzech Koron w Pieninach

Wierzbowski A., Krobicki M., Muszyński M.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

2009

T. 35, z. 3/1

107-113

Middle to Upper Jurassic of the Zamkowa Mt (Trzy Korony massif) in the Pieniny Klippen Belt show special development of the Czertezik Succession. The section reveals very thick units of crinoidal limestones: the Smolegowa Limestone Formation grainstones abruptly laterally replaced by crinoidal-spiculitic grainstones of the Flaki Limestone Formation; these are overlain by strongly condensed pelagic limestones - in their uppermost part rich in planktonic foraminifers and radiolarians - with abundant detrital grains of quartz and dolomite, fragments of crinoidal limestones, and the glauconitic nodules (glaucony). Both the development of attaining large thicknesses of strongly facies contrasted crinoidal units supplied from overhanging "crinoid gardens", as well as the appearance of abundant grains in younger pelagic limestones, prove the synsedimentary faulting which produced an active tectonic scarp during the Bajocian and at the turn of Callovian and Oxfordian.