Abstract: There are some old coastal traces 0.5 1.3 m higher than the present sea-level along the Mediterranean coastine between «Fığla burnu» and «Malta burnu» about 20 km west of Alanya. These are coastal platformswhich are formed by bioerosion of some gastropods such at Littorina and Patella. There are also bio - constructive rimson the surfaces and along the outer edges of the platform formed by calcareous algae. Some calcareous algae samplesfrom the 0.5 m elevaıed surface of the bio - crosional platforms are dated using C1 4 method. These datings showedthat the algae lived in the period between 2690 -1545 years before present on the platforms. A neo - tectonic eventwhich happened at about 1550 years before present, caused upheaval of these former platforms about 6.5 -1.2 m. Therefore, the algae died and their biological actions finished on the platforms. This event coincides with the seismo - tectonic upheaval of the coastlines of the southern Aegen island arc that is proved by other geomorphological studiesand C1 4 datings. Afterwards, nev bio - erosionai platforms and bio - constructive rims began to develop at the presentsea-level. Formation of these features is still continuing today.