Sedimentology and Sequence Stratigraphy of Barsarin Formation (Late Kimmeridgian), Northern Iraq

The Barsarin Formation deposits in northern and northeastern Iraq.
Two surface sections, the first at northern Amadiya City on the
southern limb of the Matin anticline and the second in Derash
valley on the northern limb of the Gara anticline, formed the basis
for our study. Many diagenetic processes are effected on the
studied rocks: dolomitization, dedolomitization, stylolization,
carbonate cementation, and secondary porosity. Nine main facies
were distinguished throughout the Barsarin Formation, which
represent homoclinal ramp platform with depositional
environments extended from oolitic bank to supratidal. According
to previous biostratigraphic study in conjunction with benthonic
foraminifera distribution in the studied sections, the age of Barsarin
Formation considers to be Late Kimmeridgian. Sequence
stratigraphic analysis as calibrated by facies, delineated four
depositional sequences of 4th order and 3rd order, they are
deposited in about 2.2 million years, their maximum flooding
surfaces show good correlation of the northern Arabian platform
with other parts of the Arabian platform.