Stratigraphical and sedimentological study of fat’ha formation in w and sw of Mosul City, North of Iraq

الملخص EN

Fat’ha Formation characterized, by it’s wide distribution in Iraq, which is mainly consist of gypsum, limestone and Green marl.

Sheik Ibrahim and Atshan (Hammam Al-Elil) anticlines W&SW of Mosul city, were selected for study, in which this formation is well exposed and with considerable thickness.

One hundred rock samples were collected from the above two areas.

The microscopic examination of 90 thin sections from limestone layers revealed the presence of the following genus : (Ammonia, Elphidium, Quinqueloculina, Triloculina, Pyrgo, Spiroloculina, Austrotrillina, Borlis, Peneroplis, Praerhaphdionina, Discorbis, Nonion, Textularia).These assemblages are more likely indicating the lagoonal and shallow water depositional environments.

The petrological studies suggest that although Fat’ha Formation in both area deposited in shallow, semi-restrict basin, and most probably developed under an arid climate, but Atshan area (Hammam Al-Elil basin) received more terrigenous clastics than Sheik Ibrahim.