<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The ammonites <italic>Lewesiceras peramplum</italic> Mantell and <italic>?Lewesiceras</italic> sp. are reported from the Upper Cretaceous in the Nysa Kłodzka Graben; they date from the Middle Turonian and ?Coniacian, respectively. The Middle Turonian limestones of the Stara Bystrzyca quarry contain an abundant assemblage of inoceramids (<italic>Inoceramus cuvieri</italic> Sowerby and I. lamarcki Parkinson) and other bivalves, including oysters, as well as brachiopods and trace fossils. Micropalaeontological data show the presence of foraminifers and siliceous sponge spiculae, bryozoans, ostracods and fragments of bivalves and gastropods. The Middle Turonian calcareous deposits belongs to the upper part of the <italic>Inoceramus lamarcki</italic> Zone (late Middle Turonian) and were deposited on a shallow, subtidal offshore shelf. They overlie the Middle Turonian Bystrzyca and Długopole Sandstones, which represent foreshore-shoreface delta deposits. The fossil assemblage suggests a moderate- to low-energy, normal-salinity environment with occasionally an oxygen deficit.</p></abstract>

The ammonites Lewesiceras peramplum Mantell and ?Lewesiceras sp. are reported from the Upper Cretaceous in the Nysa Kłodzka Graben; they date from the Middle Turonian and ?Coniacian, respectively. The Middle Turonian limestones of the Stara Bystrzyca quarry contain an abundant assemblage of inoceramids (Inoceramus cuvieri Sowerby and I. lamarcki Parkinson) and other bivalves, including oysters, as well as brachiopods and trace fossils. Micropalaeontological data show the presence of foraminifers and siliceous sponge spiculae, bryozoans, ostracods and fragments of bivalves and gastropods. The Middle Turonian calcareous deposits belongs to the upper part of the Inoceramus lamarcki Zone (late Middle Turonian) and were deposited on a shallow, subtidal offshore shelf. They overlie the Middle Turonian Bystrzyca and Długopole Sandstones, which represent foreshore-shoreface delta deposits. The fossil assemblage suggests a moderate- to low-energy, normal-salinity environment with occasionally an oxygen deficit.

Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben (Sudetes, SW Poland): biostratigraphical and palaeogeographical implications

Institute of the Geological Sciences, Wrocław University, Maksa Borna 9, PL 50-204 Wrocław, Poland

Geologos

The ammonites Lewesiceras peramplum Mantell and ?Lewesiceras sp. are reported from the Upper Cretaceous in the Nysa Kłodzka Graben; they date from the Middle...

Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben (Sudetes, SW Poland): biostratigraphical and palaeogeographical implications

Publié en ligne: 09 août 2012

Pages: 83 - 109

DOI: https://doi.org/10.2478/v10118-012-0007-z

Mots clés
Middle Turonian, Sudetes, Nysa Kłodzka Graben, ammonites, inoceramids, biostratigraphy

This content is open access.

Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben (Sudetes, SW Poland): biostratigraphical and palaeogeographical implications

Publié en ligne: 09 août 2012

Pages: 83 - 109

DOI: https://doi.org/10.2478/v10118-012-0007-z

Mots clésMiddle Turonian, Sudetes, Nysa Kłodzka Graben, ammonites, inoceramids, biostratigraphy

This content is open access.

Mots clés
Middle Turonian, Sudetes, Nysa Kłodzka Graben, ammonites, inoceramids, biostratigraphy