Abstract
Stratigraphy and Lithology of the Avroman Formation (Triassic), North East Iraq
Highlights
Avroman Formation is introduced by Bolton (1958) in Buday (1980) consists of a sequence of light colored, thick bedded, partly crystalline limestone with interbeds of marly limestone
This study has the following conclusions: 1- The formation is composed of pure limestone without marl and dolomite 2- The formation is overlained by Qulqula Radiolarite Formation and Merga Red Beds in Iraq and Iran respectively; whereas underlaying formation is not exposed. 4- The main constituents of the formation are oncolite, oolith, pellet and fossils. 5- The environment of the deposition was shallow which is represented by an isolated platform with agitating water
(11) Iraqi Journal of Earth Sciences, Vol 7- No 1- April- 2007
Summary
Avroman Formation is introduced by Bolton (1958) in Buday (1980) consists of a sequence of light colored, thick bedded, partly crystalline limestone with interbeds of marly limestone. In the tectonic subdivision of Iraq, Jassim et al (1987) put the Avroman limestone in the Qulqula-Khuakurk Subzone and gave it the rank (status) of formation. They indicated its outcrops in the northeast Iraq, on the border with Iran where the Suren and Avroman Mountain (or locally called Shakhy Awraman) summits coincide with the border with Iran (Fig.). All these are used to indicate the environment and paleogeographic of the basin in which the formation was deposited
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