AI Summary & Key Takeaways
AI InsightLithological and faunal contentsindicate that sediments of the Kocaçay formation were deposited within lagoon to nummulitic setsin a shallow marine environment
📌 3 Key Takeaways
Abstract
Although the Çankırı-Çorum Basin was studied for various purposes such as geological,stratigraphical, tectonic, coal and oil exploration, studies on fossils are limited. Especially therehave not been detailed studies on molluscs and larger foraminifera. The research area is located atthe vicinity of Ayvalıca (north of Çankırı-Çorum basin). The Middle Eocene Kocaçay formation,which outcrops in the Çankırı-Çorum Basin, is widespread around Bayat Çorum in the north of thebasin, Sulakyurt Kırıkkale in the west, Çiçekdağı Kırşehir in the south and Sungurlu Çorum in themiddle of the basin. The formation is composed of conglomerate, carbonated sandstone, limestoneand sandy marls and also includes rich larger foraminifera and molluscs. This study mainly focuseson taxonomy and environmental interpretations of Ostrea roncaensis (Partsch in coll. Bayan, 1870)de Gregorio, 1884, Velates perversus (Gmelin, 1791) species from Mollusca and Nummulitesbeaumonti d’Archiac and Haime, 1853, N. aturicus Joly and Leymerie,1848, N. perforatus (deMontfort, 1808) and Assilina exponens (Sowerby, 1840) species from larger Foraminifera. Inaddition, considering faunal features from bottom to top Ostrea roncaensis, Velates perversus,Nummulites aturicus and Assilina exponens Abundance Biozones were identified. The age rangeof the Kocaçay Formation is determined as Lutetian-Bartonian. Lithological and faunal contentsindicate that sediments of the Kocaçay formation were deposited within lagoon to nummulitic setsin a shallow marine environment