ROTALİİDAE FAMİLYASINA AİT YENİ BİR CİNS ORDUINA N. GEN. VE TÜRÜ HAKKINDA

Kuzey Anadolu'da Ordu-Gölköy civarında, takriben Gölköy'ün 8 km kuzeydoğusunda, yer yer Globotruncana'lı Senonien kalkerleri ve yer yer de andezitler üzerine gelen Paleosen kalkerlerinin tetkiki esnasında aşağıda tarifini vereceğimiz Orduina n. gen. rastlanmıştır. Ancak tetkik etmiş olduğum kalkerler çok sert olduklarından, fertleri tane olarak elde etmek mümkün olmamıştır. Yapmış olduğum inceleme, ince kesitlerden ve bu kesitlerden çıkarmış olduğum geometrik esaslara dayanmaktadır.

Anahtar Kelimeler:

ROTALİİDAE FAMİLYASI, ORDUINA N. GEN., Globotruncana

ON THE DISCOVERY OF ORDUINA N. GEN., A NEW GENUS OF THE FAMILY ROTALIIDAE

A new genus of the family Rotaliidae, Orduina n. gen., has been discovered in the limestone samples from the Paleocene of Gölköy (Ordu Province, North Anatolia). The samples studied were collected from a locality approximately 8 km northeast of Gölköy. The investigated limestone unit overlies either andesites or Senonian limestone containing Globotruncana. The description of Orduina n. gen. is given below. Due to the hardness of the investigated limestone samples, it was not possible to obtain free individuals. The present study is based on thin sections and geometrical considerations.

Keywords:

ON THE DISCOVERY, ORDUINA N. GEN., A NEW GENUS,

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