Many radiometric data including 14 C and 210 Pb were collected from shallow and deep cores in 10 sites of Gorgan bay and adjacent Coasts in southeast of Caspian sea, north of Iran. These data were classified to Early Holocene (Lower Newcaspian) and Late Holocene (Upper Newcaspian) and their sedimentation rate were measured. After the normality test of gathered data, IDW (Inverse Distance Weighting) was chosen as interpolation method and sedimentation rate maps were produced. Average of 2.06 mm/year sedimentation rate in Early Holocene (Lower Newcaspian) and 5.08 mm/year in Late Holocene (Upper Newcaspian) of Gorgan bay were calculated. Our findings indicate that sedimentation rate increases from east to west of Gorgan bay in both Early and Late Holocene.

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