Yazar "Rueckert-Uelkuemen, Neriman" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Biostratigraphy of the Paratethyan Neogene at Yalova (Izmit-Province, NW-Turkey)
    (Gebruder Borntraeger, 2006) Rueckert-Uelkuemen, Neriman; Kowalke, Thorsten; Matzke-Karasz, Renate; Witt, Wolfgang; Yiğitbaş, Erdinç
    Two main palaeoenvironments are reconstructed for the Paratethyan deposits at Yalova (Turkey). The investigated sections show the typical lithologic composition of the Neogene of NW Turkey, however, the palaeoecological context was so far unknown and the stratigraphic differentiation was still outstanding. In this study, molluscs, ostracods and fish remains are used as tools for the interpretations of the palaeoenvironmental situation. These biota reflect palaeoenvironments, represented by (1) the clastic section of the Kilic Formation and (2) the Yalakdere Formation, which is characterized by marl, clay and coal sedimentation. While the Kilic Formation comprises sediments of fluviatile deltaic systems, connected to lagoons with partly reduced water energy, the Yalakdere Formation exemplifies freshwater habitat, including stagnant water bodies with a seasonally slightly varying salinity and, at most, moderately flowing rivers. The investigated biota indicate a Late Miocene age of both the Kilic and the Yalakdere Formation. Some species furthermore allow a more detailed stratigraphic assignment: the Yalakdere Formation corresponds to the Late Khersonian/Early Maeotian. Comparisons with contemporaneous faunas indicate connections to the Dacian, Euxinian and Caspian Basins and a weak Mediterranean influence. No occurrences of Central Paratethyan elements of the corresponding Late Pannonian time interval are evident.
  • [ X ]
    Öğe
    Pharyngeal teeth, lateral ethmoids, and jaw teeth of fishes and additional fossils from the late Miocene (late Khersonian/early Maeotian) of eastern paratethys (Yalova, near Istanbul, Turkey)
    (Tubitak Scientific & Technological Research Council Turkey, 2007) Rueckert-Uelkuemen, Neriman; Yiğitbaş, Erdinç
    A late Khersonian to early Maeotian fossil assemblage from the Upper Miocene to Lower Pliocene Yalakdere Formation near Yalova city ( northwestern Anatolia, Turkey) is documented. The following fish taxa, represented by pharyngeal teeth, lateral ethmoids and jaw teeth are described: Cyprinidae with Carassius sp., Tinca sp., Scardinius sp., Leuciscus sp., Barbus sp., Cobitidae with Cobitis sp., Siluridae with Silurus sp., and Esocidae with Esox sp.. Further described vertebrates are reptiles ( Trionyx sp.) and small mammals ( cf. Eliomys intermedius FRIANT). Additional invertebrate fauna and flora, comprising diverse gastropods, ostracods, charophytes, pollen and limnic green algae, are listed. The fossil assemblage from the Yalakdere Formation indicates fresh to slightly brackish water environments.