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Zróżnicowanie warunków geotermalnych cenomańskiego systemu wodonośnego w rejonie Buska-Zdroju na przykładzie danych z nowych wierceń

Gągulski T., Gorczyca G.

Technika Poszukiwań Geologicznych

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2018

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R. 57, nr 1

73--85

PL

Niecka miechowska stanowi obszar perspektywiczny pod względem występowania wód geotermalnych w obrębie cenomańskiego systemu wodonośnego. Wody takie zostały nawiercone w rejonie Buska-Zdroju w latach 2016–2017 trzema otworami OB-I, OB-II oraz OB-V. Otwory te zlokalizowane są po obu stronach dużej regionalnej dyslokacji zwanej uskokiem radzanowskim. Stwierdzona głębokość występowania wód geotermalnych w tym rejonie wynosi od 732,5 m (otw. OB-I) do 344,0 (otw. OB-II). Maksymalne temperatury wody na wypływie z otworów OB-I, OB-II i OB-V jakie uzyskiwano podczas badań wynoszą odpowiednio 27,2, 22,3 i 23,5°C. Są to wody chlorkowo-sodowe i chlorkowo-siarczanowo-sodowe, często jodkowe oraz siarczkowe. Pomimo tego, iż występują w obrębie utworów cenomanu, nie zawsze zawierają siarkowodór. Analiza wyników wykazała, że wyższy gradient geotermiczny występuje po południowej stronie uskoku Radzanowa. Jednak to obszar po północnej jego stronie, tj. rejon otworu OB-I, jest bardziej perspektywiczny pod kątem wykorzystania wód geotermalnych choćby do celów balneologicznych.

EN

The Miechów Basin is a prospective area in terms of geothermal water occurrence within the Cenomanian aquifer. Three hydrogeological drillings (OB-I, OB-II, and OB-V) were made in the Busko-Zdrój area in 2016–2017. These geothermal water boreholes are located on both sides of a large regional dislocation called the Radzanów Fault. The geothermal water in this area occurs within the depth interval between 732.5 to 344.0 m, and the maximal temperatures at the outflow range from 21.5 to 27.2°C. These are chloride-sodium and chloride-sulfatesodium waters, often with iodide and sulphide. Despite the fact that these waters occur within the Cenomanian formations, they do not always contain hydrogen sulphide. The results of the studies showed that better geothermal conditions take place on the southern side of the Radzanów Fault.

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Isolated pliosaurid teeth from the Albian-Cenomanian (Cretaceous) of Annopol, Poland

Madzia D., Machalski M.

Acta Geologica Polonica

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2017

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Vol. 67, no. 3

393--403

EN

Brachauchenine pliosaurids were a cosmopolitan clade of macropredatory plesiosaurs that are considered to represent the only pliosaurid lineage that survived the faunal turnover of marine amniotes during the Jurassic–Cretaceous transition. However, the European record of the Early to early Late Cretaceous brachauchenines is largely limited to isolated tooth crowns, most of which have been attributed to the classic Cretaceous taxon Polyptychodon. Nevertheless, the original material of P. interruptus, the type species of Polyptychodon, was recently reappraised and found undiagnostic. Here, we describe a collection of twelve pliosaurid teeth from the upper Albian–middle Cenomanian interval of the condensed, phosphorite-bearing Cretaceous succession at Annopol, Poland. Eleven of the studied tooth crowns, from the Albian and Cenomanian strata, fall within the range of the morphological variability observed in the original material of P. interruptus from the Cretaceous of England. One tooth crown from the middle Cenomanian is characterized by a gently subtrihedral cross-section. Similar morphology has so far been described only for pliosaurid teeth from the Late Jurassic and Early Cretaceous. Even though it remains impossible to precisely settle the taxonomic distinctions, the studied material is considered to be taxonomically heterogeneous.

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Taxonomy and taphonomy of Cenomanian (Upper Cretaceous) nautilids from Annopol, Poland

Machalski M., Wilmsen M.

Acta Geologica Polonica

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2015

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Vol. 65, no. 4

495--506

EN

A nautilid faunule of seven specimens, comprising Eutrephoceras bouchardianum (d’Orbigny, 1840), Cymatoceras deslongchampsianum (d’Orbigny, 1840), and Cymatoceras tourtiae (Schlüter, 1876) is described from a condensed middle Cenomanian interval at Annopol, Poland. C. tourtiae is recorded for the first time in Poland. The studied material consists of reworked phosphatised internal moulds of phragmocones, which may be of early or middle Cenomanian age, given the stratigraphic range of the associated ammonites. The nautilid moulds vary in inferred mode of infilling, and in intensity of abrasion, bioerosion and mineralisation. The sediment entered the phragmocones in two ways: 1) through punctures in the shell, the result of bioerosion or mechanical damage; 2) through siphonal openings by intracameral currents. In contrast to the fossil moulds from the Albian phosphorites of Annopol, which originated via direct precipitation of apatite around and/or inside fossils, the present nautilid moulds seem to have originated through secondary phosphatisation of the initially calcareous moulds. Diversity of taphonomic signatures in nautilid material from the middle Cenomanian interval at Annopol is compatible with the complex, multievent depositional scenario proposed for this level.

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Lower and Middle Cenomanian ammonites from the Morondava Basin, Madagascar

Kennedy W. J., Walaszczyk I., Gale A. S., Dembicz K., Praszkier T.

Acta Geologica Polonica

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2013

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Vol. 63, no. 4

625--655

EN

Lower and Middle Cenomanian ammonite assemblages have been collected on a bed-by-bed basis from localities at Vohipaly and Mahaboboka, Madagascar, as well as from outcrops around Berekata, all in the Morondava Basin, southwest Madagascar. These collections demonstrate the presence of the upper Lower Cenomanian Mantelliceras dixoni Zone and the lower Middle Cenomanian Cunningtoniceras inerme Zone of the north-western European standard sequence. These records indicate that the striking anomalies in the zonal assemblages of the classic divisions of the Madagascan Cenomanian are based on mixed assemblages, rather than a succession that differs radically from that elsewhere in the world. The dixoni Zone fauna is: Desmoceras cf. latidorsatum (Michelin, 1838), Pachydesmoceras kossmati Matsumoto, 1987, Forbesiceras sp., F. baylissiWright & Kennedy, 1984, F. largilliertianum (d'Orbigny, 1841), Mantelliceras cantianum Spath, 1926a, M. dixoni Spath, 1926b, M. mantelli (J. Sowerby, 1814), M. picteti Hyatt, 1903, M. saxbii (Sharpe, 1857), Sharpeiceras sp., S. falloti (Collignon, 1931), S. mocambiquense (Choffat, 1903), S. cf. florencae Spath, 1925, Acompsoceras renevieri (Sharpe, 1857), A. tenue Collignon, 1964, Calycoceras sp., Mrhiliceras lapparenti (Pervinquičre, 1907), Mariella (Mariella) stolizcai (Collignon, 1964), Hypoturrilites taxyfabreae (Collignon, 1964), Turrilites scheuchzerianus Bosc, 1801, Sciponoceras cucullatum Collignon, 1964, and Sciponoceras antanimangaensis (Collignon, 1964). The presence of Calycoceras in a Lower Cenomanian association represents a precocious appearance of a genus typically Middle and Upper Cenomanian in occurrence, and matches records from Tunisia. The inerme Zone yields a more restricted assemblage: Pachydesmoceras kossmati, Forbesiceras baylissi, Acanthoceras sp. juv., Cunningtoniceras cunningtoni (Sharpe, 1855) and Hypoturrilites taxyfabreae.