Brachiopods from the Palaeogene clastic deposits of north-western Italy
Bitner, Maria Aleksandra; Uchman, Alfred; Rattazzi, Bruno
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 298 Heft 2 (2020), p. 165 - 176
72 références bibliographiques
publié: Nov 26, 2020
manuscrit accepté: Oct 2, 2020
manuscrit reçu: Jul 17, 2020
ArtNo. ESP155029802004, Prix: 29.00 €
Abstract
Four brachiopod species, i.e. Erymnaria bolcensis (Massalongo, 1850), Gryphus cf. minor (Philippi, 1836), Terebratulina tenuistriata (Leymerie, 1846), and Megathiris detruncata (Gmelin, 1791) have been identified in the Oligocene deposits of NW Italy. The species G. cf. minor and T. tenuistriata dominate in the studied material. This is the first record of M. detruncata from the Oligocene of Italy, although it has been noted both from the Eocene and Miocene of Italy. The stratigraphic ranges of E. bolcensis and T. tenuistriata have been extended. The studied assemblage differs considerably from the majority of the Palaeogene and Neogene assemblages of Europe dominated by micromorphic megathyridids. Geological context and sedimentary features point to mass-flow deposits of fan deltas, indicating that the assemblage has been transported within the sediment down a slope.
Mots-clefs
Brachiopoda • Oligocene • Grue Formation • Molare Formation • Apennines • Italy