Yerbilimleri, 22 (2000), 79-93
Hacettepe Üniversitesi Yerbilimleri Uygulama ve Araştırma Merkezi Bülteni
Bulletin of Earth Sciences Application and Research Centre of Hacettepe University
New Overviews on paleogeographical distribution of the species of Loftusia (foraminifera) in the Tethyan Ocean of Maastrichtian (Late Cretaceous)
Engin MERİÇ, Şükrü ERSOY
İstanbul Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, 34850 Avcılar, İSTANBUL
Muhittin GÖRMÜŞ
Süleyman Demirel Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, 32260 Çünür, ISPARTA
ABSTRACT
This study includes paleogeographical re-evaluation of various Loftusia species known to exist mainly in the Middle East Countries (Late Cretaceous-Maastrichtian) in the lights of plate tectonic theory. Besides, it also discusses similarities and differences of various species in the small plates of the two giant continents in place and time. In taking the species variety and their abundance in the various platforms into the consideration, salinity and temperature, on the another hand, living near the equator, affected the abundance and size of Loftusia species. Smaller forms occurred at the end of the Late Maastrictian and the stratigraphical range of the Loftusia species in Turkey is from Middle to Upper Maastrichtian. In addition, it is also thought that tiny ophiolitic rock fragments within the Loftusia tests were related to the ophiolitic movements and substrate features during the Late Maastrichtian.
Key words: Loftusia, Maastrichtian, Paleogeography, Tethyan.
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