Introduction The morphology of two Kiashahr, in west and Amirkola lagoons, in east, along the eastern flank of Sefidrud Delta has been investigated regarding to sea-level changes since the Late Little Ice Age. Generally the Caspian Sea level were high during the Little Ice Age ( Leroy et al., 2011). This research focuses on this highstand and its impacts on the morphology of the Sefidrud Delta. Method Two-dimensional Ground Penetrating Radar (GPR) have been carried out along 4 transects normal to the coastline using an unshielded RAMAC/GPR system. The mean frequencies of 50 and 100 MHz have been selected for the antenna to provide a good trade off between depth penetration and resolution. Three cores were taken by a vibracorer system and the sub-samples were examined to get basic sedimentological results including organic matter content, carbonate content and grain size. Organic matter and carbonate content have been calculated based on Heiri et al. (2001) outlined methods. Fritsch standard sieve stack was used for getting grain-size results. Two beach profiles have been measured along the GPR transects perpendicular to shoreline using a Total Station. The results were used in GPR data processing and surface morphology reconnaissance studies. A bulk organic matter and a wood sample have been selected and sent to Poznan Radiocarbon Laboratory for radiocarbon dating. Results and discussion

Keywords