Paleontology and stratigraphy of upper cretaceous sediments in the Ilgaz region (Çankiri, Turkey)
The Ödemiş Formation crops out around Ödemiş village to the northwest of the town of Ilgaz (Çankiri, Turkey). The Formation was deposited in neritic environments, and it consists of conglomerate, nodular limestone, sandstone, sandy limestone, and claystone, interbedded with volcanics. The sandy limestones contain the benthic foraminifera Orbitoides aff. medius (d'Archiac), O. aff. apiculatus Schlumberger, Sirelina orduensis Meriç & İnan, Omphalocyclus macroporus (Lamarck), Sirtina orbitoidiformis Brönnimann & Wirtz, Praestorrsella roestae (Visser), Laffitteina bibensis Marie, Laffitteina boluensis Dizer, Laffitteina aff. marsicana Farinacci, Smoutina aff. cruysi Drooger, Siderolites calcitrapoides Lamarck, and Selimina spinalis Inan. Praestorrsella roestae (Visser) was abundant. This foraminiferal assemblage indicates an upper Maastrichtian age.