Akademik Veri Yönetim Sistemi
Yerbilimleri, sa.23, ss.33-52, 2001 (Scopus)
In this study, the Micula mura (NC-23) (upper most Maastrichtian), Markalius inversus (NP-1), Cruciplacolithus tenuis (NP-2), Chiasmolithus danicus (NP-3) (Danian), Ellipsolithus macellus (NP-4), Fasciculithus tympaniformis (NP-5), and Heliolithus kleinpellii (NP-6) (Thanetian) calcareous nannoplankton zones and Morozovella pseudobulloides, Morozovella trinidadensis, Morozovella uncinata (Danian), Morozovella angulata (Danian-Thanetian), Planorotalites pseudomenardii (Thanetian) planktic foraminiferal zones were recognised from the samples collected from the upper most level of the Haymana formation and from the bottom to the top of the Çaldaǧ and Kirkkavak formations. These units represent late Maastichtian-Paleocene interval. They were deposited in turbidite and limestone facieses of the northwest Tuzgölü Basin in the Karahoca-Mangaldaǧ- Yeşilyurt-Sarihalit area. Lithological characteristics and distribution of the numerical abundance of calcareous nannoplankton, planktic, benthic foraminifera and other fossil contents of the formations showed that the sea level was not stable during the late Maastrichtian-Paleocene interval in the studied area. On the basis of available data belonging to the upper Maastrichtian; Karahoca area was a basin character. During the Danian time, while the Yeşilyurt area has the characteristics of middle-outher shelf, Mangaldaǧ area implies a middle-outher shelf, slope and, basin characters sequently. During the Thanetian time, Karahoca and Yeşilyurt areas show a slope and basin characters, while the Sarihalit area possess outher shelf and slope characteristics. Moreover, percentage abundance and the diversity of temperature-sensitive calcareous nannoplankton groups indicate that, the sea-surface water of the Karahoca area was a tropical-temperate character at the late Maastrichtian. During the Danian time; Karahoca area also, shows a tropical-temperate character when Mangaldaǧ and Yeşilyurt areas accosionaly imply tropical-temperate and temperate-cool periods. Also, at the Thanetian time; in the Karahoca and Yeşilyurt areas, sea-surface water accosionaly has tropical-temperate and temperate-cool characteristics, while the Sarihalit area shows a tropical-temperate character.