Document Type : Research Paper

Authors

• Ali D.Gayara ¹
• Amir S.Al-Gibouri ²

¹ University of Baghdad - College of Science

² University of Anbar - College of Science

Abstract

The Lower Jurassic Silisiclastic-Carbonate Succession of Western Iraq consist(from
bottom to up) of Ubaid, Hussiniyat, and Amij succession. They were deposited within a variety of
continental, transitional and marine environments. Microfacies analysis of the Ubaid Formation reflect
deposition in different environments within the carbonate platform. Lithofacies analysis of the clastic
unit of the Hussiniyat Formation reflect deposition within a meandering river system, the Coastal plain
facies can also be recognized within the lower part of the upper carbonate unit. The Amij succession
consist of a lower clastic unit with few carbonate interbeds and an upper carbonate unit. This
succession consist of a wide range of lithofacies reflecting the different subenvironments of fluvial,
transitional and shallow marine environments. The activity of the Rutba uplift and Anah Graben
during the Early Jurassic greatly affected the paleogeography of the basin in the study area

Keywords

• Facies Analysis
• Paleoenvironments
• Lower Jurassic Silisiclastic
• Carbonate Succession
• Western Iraq

Main Subjects

• Biology