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Browsing by Subject "Middle Triassic"

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    Item type:Article, Access status: Open Access ,
    A regurgitalite of the Middle Triassic (Muschelkalk) from Upper Silesia (Poland)
    (Wydawnictwa AGH, 2021) Niedźwiedzki, Robert; Surmik, Dawid; Chećko, Agnieszka; Salamon, Mariusz A.
    A bromalite from the Middle Triassic (Muschelkalk) of southern Poland, Sadowa Góra Quarry, is herein described and interpreted as a regurgitalite. The fossils occurring within the regurgitalite are angular and have sharp edges. They are represented by common fragments of thin-shelled bivalves as well as rare crinoid and gastropod remains. The composition of the collected inclusion is different from that of the host rock. There are many candidates that could have produced the regurgitalite, including durophagous sharks, marine reptiles, the actinopterygian <i>Colobodus</i>, or nautiloids. Our finding adds to the emerging evidence of durophagous predation in the Triassic sea of Polish part of the Germanic Basin. It is the second record of a regurgitalite from the Muschelkalk of Upper Silesia.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ophiuroids from the Middle Triassic (Muschelkalk) of Sadowa Góra, Jaworzno (southern Poland)
    (Wydawnictwa AGH, 2020) Surmik, Dawid; Salamon, Mariusz A.; Chećko, Agnieszka; Kędroń, Karolina
    Ophiuroids belonging to <i>Aspiduriella</i> sp., <i>Aspiduriella similis</i> (Eck), and <i>Arenorbis</i> sp. are described from the Middle Triassic (Muschelkalk) strata of the Sadowa Góra Quarry (Jaworzno) in southern Poland. This is the only Polish location where three taxa of these ophiuroids have been found in one stratigraphic horizon (1$^{st}$ Wellenkalk). To date, only single taxa have been found in the Triassic sections of the eastern part of the Germanic Basin. Finally, other ophiuroid mass aggregations also known from Poland are presented.