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    Biostratigraphic and palaeoecologic study of the early Maastrichtian-Paleocene sediments in Kaleci?k region (Ankara-Turkey)
    (King Fahd University of Petroleum and Minerals, 1999) Yildiz, Ayşegül; Karahasan, Güher; Demircan, Huriye; Toker, Vedia
    [No abstract available]
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    Distribution of the recent planktic foraminifera of bottom sediments at the northeastern Aegean Sea in the Gökçeada-Bozcaada-Çanakkale triangle
    (2002) Toker, Vedia; Yildiz, Ayşegul
    Mediterranean type 8 species of 4 planktic foraminiferal genera were described in 70 of 100 bottom samples collected from the Gökçeada-Bozcaada-Çanakkale triangle. These species, which show an increase in their abundance and variety depending on depth and temperature of the sea water from Dardanelles to Aegean Sea, are Globigerina bulloides (d'Orbigny), Globigerina falconensis (Blow), Globigerina praebulloides Blow, Globigerinoides ruber (d'Orbigny), Globigerinoides sacculifer (Brady), Globigerinoides trilobus immaturus LeRoy, Globigerinoides trilobus trilobus (Reuss), Neogloboquadrina sp., Orbulina universa d'Orbigny. The specie represent warm and cool waters of the subtropical belt and within the assemblages and proportions of the subtropical-warm water forms are more abundant than the others. In addition, it was observed that the juvenil forms were abundant at the exit of Dardanelles and the number of the adult forms increases towards the Aegean Sea depending on increase in depth and juvenile forms were dominant at the exit of Dardanelles.
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    Pleistocene-Holocene calcareous nannofossil biostratigraphy of core samples from The Northeastern Sea of Marmara, Fenerbahce-Pendik, NW Turkey
    (PERGAMON-ELSEVIER SCIENCE LTD, 2006) Yildiz, Aysegul; Toker, Vedia
    Pseudoemiliana lacunosa, Gephyrocapsa oceanica and Emiliania huxleyi (Ionian) (Pleistocene-Holocene) calcareous nannoplankton zones were identified from 82 samples of 14 cores taken from 8 locations in the northeastern Sea of Marmara. The investigation indicates that the identified biozones have been alternated by tectonic activity in the 1, 5 and 6 core locations. The study area has been affected three times by tectonic activity during the Pleistocene-Holocene time interval. The first activity occured during the Early Pleistocene and the others during Holocene. (c) 2005 Elsevier Ltd. All rights reserved.