The deposition of fluviatile Injana (Upper Fars) Formation
in the foreland basin of Iraq in the Late Miocene marked the
end of marine conditions in northern Iraq. This formation is
a clastic sequence of medium to coarse sandstones, siltstones
and claystones and was deposited in a fluvial-tidal environment
(Al-Banna, 1982; Al-Juboury, 1994)