First recording of gastropods and pelecypods molluscs from Southern Iraq : evidence of holocene sea level fluctuation

الملخص EN

The current study focused on the diagnosis of species related to gastropoda and pelecypoda classes, mostly in the planktonic larval stage, to be used as evidence of marine transgression in mid-Holocene.

Of these, twenty of them have been recognized for the first time in Iraq.

Three bio-facies were distinguished using these species as well as statistical grain size parameters.

They are; the first bio-facies (B1) reflects the marine transgression that occurred in the middle of the Holocene, while the second bio-facies (B2) shows the marine regression.

The third bio-facies (B3) indicates the sea level fluctuation at the end of the Holocene