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A NEW RECORD OF RADIOLARIAN SPECIES (Dictyomitra multicostata) INDICATING THE EARLY BERRIASIAN STAGE WITHIN THE CHIA GARA FORMATION, IN SULAIMANIYAH, NORTHEAST IRAQ | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 7, Issue 1, 2011, Pages 29-37 | ||
| Authors | ||
| Kifah N. Al-Kubaysi; Sahira A. Karim | ||
| Abstract | ||
| The Late Tithonian – Berriasian radiolarians of Chia Gara Formation were identified by studying 9 samples from outcrop section (KO/74/690) in the northeastern limb of Surdash Anticline at north of Sulaimaniyah city, northeast Iraq. The samples collected by the filed geologists of GEOSURV during 2008. Three formations are exposed in the section, (from bottom to top) Barsarin Formation; composed of fine crystalline dolomite rich with algal srtomatolites, Chia Gara Formation; composed of radiolarian clayey limestone, and Balambo Formation; composed of highly dolomitized limestone. An important Berriasian species of Radiolaria (Dictyomitra multicostata Zittli) was found and recorded for the first time within the Chia Gara Formation marking the beginning of the Early Cretaceous Epoch. Abundant Radiolarias in the studied samples indicate basinal marine environment; also the presence of Radiolaria and chert horizons in the formation represent the close relation with the Qulqula Radiolarian Series. | ||
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