Abaskun, first recorded by Ptolemy as Socanaa, was documented in Arab sources as "the most famous port of the Khazarian Sea". It was situated within three days' journey from Gorgan. The southern part of the Caspian Sea was known as the "Sea of Abaskun". See: B.N. Zakhoder (1898–1960). The Caspian Compilation of Records about Eastern Europe (online version).
