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Addendum to the chemostratigraphy of the uppermost Callovian–middle Oxfordian interval of the Tethyan Fatricum domain (Tatra Mts, Krížna Nappe, southern Poland)

Jach Renata

Annales Societatis Geologorum Poloniae

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2021

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Vol. 91, No. 4

419--425

EN

New isotope (δ13C, δ18O of bulk carbonates) and carbonate content data from the uppermost Callovian–middle Oxfordian radiolarites of the Fatricum domain belonging to the north-western segment of the Tethys are added to previously published data. The new data supplement the Długa Valley section, the most nearly complete Bajocian–lower Tithonian section of the Krížna Nappe in the Tatra Mts. The uppermost Callovian and Lower Oxfordian bulk δ13C values (from 3.1 to 3.3‰) remain nearly constant with highly positive values. Therefore, the positive excursion identified in bulk carbonate δ13C values is interpreted as a record of the upper Callovian–middle Oxfordian global phenomenon. In this interval, a significant increase of CaCO3 content is recorded, which accompanies facies change from ribbon radiolarites with siliceous shale partings to calcareous radiolarites with rare shale intercalations. The abrupt CaCO3 increase may reflect a turning point in Early Oxfordian carbonate production and recovery of the marine carbonate factory.

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Zbigniew Sujkowski – uczony i żołnierz

Miecznik J. B.

Przegląd Geologiczny

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2014

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Vol. 62, nr 5

234--239

EN

Zbigniew Sujkowski was a co-founder of Polish sedimentary petrography and a pioneer of sedimentology. After studying geology at the University of Warsaw (1921–1925), he worked in 1927–1929 with Prof. Lucien Cayeux at Collège de France in Paris. He specialized in petrographic-sedimentological studies of Cretaceous deposits in Poland, but especially of siliceous rocks. His treatise on diagenesis, published posthumously in 1958, is among the classics of world geological literature. Zbigniew Sujkowski was a Polish patriot. In the period 1914–1920, he participated in the armed struggle for the independence of Poland, and during World War II – in the armed resistance movement against German occupation as the organizer of subversion. At the end of the war, he was in London; his return to Poland was impossible from political reasons. Sujkowski immigrated to Canada and took a job at MacMaster University in Hamilton. He died tragically in an accident.

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Integrated stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

Jach R., Djerić N., Goričan Š., Řeháková D.

Annales Societatis Geologorum Poloniae

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2014

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Vol. 84, No. 1

1--33

EN

Middle-Upper Jurassic pelagic carbonates and radiolarites were studied in the Krížna Nappe of the Tatra Mountains (Central Western Carpathians, southern Poland and northern Slovakia). A carbon isotope stra- tigraphy of these deposits was combined with biostratigraphy, based on radiolarians, calcareous dinoflagellates and calpionellids. In the High Tatra and Belianske Tatra Mountains, the Bajocian and part of the Bathonian are represented by a thick succession of spotted limestones and grey nodular limestones, while in the Western Tatra Mountains by relatively thin Bositra-crinoidal limestones. These deposits are referable to a deeper basin and a pelagic carbonate platform, respectively. The various carbonate facies are followed by deep-water biosiliceous facies, namely radiolarites and radiolarian-bearing limestones of Late Bathonian-early Late Kimmeridgian age. These facies pass into Upper Kimmeridgian-Lower Tithonian pelagic carbonates with abundant Saccocoma sp. The bulk-carbonate isotope composition of the carbonate-siliceous deposits shows positive and negative S C excursions and shifts in the Early Bajocian, Late Bajocian, Early Bathonian, Late Bathonian, Late Callovian, Middle Oxfordian and Late Kimmeridgian. Additionally, the S13C curves studied show a pronounced increasing trend in the Callovian and a steadily decreasing trend in the Oxfordian-Early Tithonian. These correlate with the trends known from the Tethyan region. The onset of Late Bathonian radiolarite sedimenlalion is marked by a decreasing trend in S13C. Increased S13C values in the Late Callovian, Middle Oxfordian and Late Kimmeridgian (Moluccana Zone) correspond with enhanced radiolarian production. A significant increase in CaCO3 content is recorded just above the Late Callovian S13C excursion, which coincides with a transition from green to variegated radiolarites.