Sample Sidebar Module

This is a sample module published to the sidebar_top position, using the -sidebar module class suffix. There is also a sidebar_bottom position below the menu.

Sample Sidebar Module

This is a sample module published to the sidebar_bottom position, using the -sidebar module class suffix. There is also a sidebar_top position below the search.
قسم علوم الأرض

Najah Alwan Owaiz

Prof. Dr. Mazin Y. Tamar-Agha

Department of Geology – University of Baghdad – Collage of Science

 ABSTRACT:

This study deals with the petrography of the Mulussa Formation (Carnian - Norian age)  in western desert of  Iraq (NE of Rutba city ).

About (80) thin sections taken from carbonate sediments samples of four outcrop sections are carried out to recognize the constituents (skeletal , non-skeletal grains and cement) of the lithological units. Skeletal grains are represented by Pelecypods (Bivalve), Gastropods, Crinoids, Echinoids, Alge, Foraminifera and fragments of organisms shells. All of these skeletal grains were entirely affected by diagenetic processes. Non-skeletal grains include carbonate grains: pellets and ooids while non-carbonate grains: quartz. Regarding cement, it is mostly represented as crystals of dolomite ( Aphanocrystalline to medium crystalline ) with euhedral to subhedral edges.  

Diagenetic processes is represented by dolomitization,  dedolomitization, dissolution, cementation  and  silica replacement with dolomite. All this petrographic description is done by using a polarizing microscope.