دراسة طباقية لتكوين طيارات (الكريتاسي الأعلى)‎ في آبار مختارة-غرب العراق

الملخص EN

The present investigation deals with the Vitho- and biostratigraphy of the Tayarat Formation (Upper Cretaceous) from five subsurface sections in Western Iraq.

The studied formation composed frthologically of limestone, sometimes dolomitized.

The benthonic foramicufcra recorded from the Tayarat Formation permit the recognition of the following zones from base to top : 1-Orbitoides tissoti-Orbitoides medius Zone.

2-Orbitoides apiculalus Zone 3-Lepidorbitoides socialis-Lepidorbitoides minor Zone.

4-Pseudocbysalidina conica-Pseudolituone/Ia reicheli Zone The present investigation indicates that the Tayarat Formation is Late Campanian-Late Maastrichtian in age.