Found at the Massachusetts site are about 38 tools and stone chips used for making and repairing tools, as well as a hearth and a storage pit.
Senior archaeologist on the team that surveyed the area said it was unusual to find features of civilizations, like the hearth and the stone pit, so early in their survey. There are portions of the site beneath the surface that are not disturbed.
Classical texts refer to triremes (TRI-reems) being rescued, towed to dry land and repaired to be reused.
Around 20,000 men were lost in the disaster, which shook Persia at a time when it had its sights on assimilating mainland Greece within its empire.
53 sites date to different periods as far back as 7,000 years.
During the excavations, two main periods were identified: the Harappan (ha-RAP-pan) and Kot Dijian (KOT di-JAN).
The team will search for sunken remains of the armada, sent by Persian king Darius to invade Greece.Experts say that the hearth at this site offers the possibility of radiocarbon dating, which can help to better define the period.The tools are characteristic of the Late Archaic and Middle Archaic periods of the Holocene Epoch, and are between 3,000 to 7,500 years old.The survey promises not only to provide information about Chester's Roman past but could also shed light into early Christian life in Britain.The technology being employed includes a robotic electromagnetic survey, a ground-penetrating radar and earth resistance survey to provide a map of features buried below the ground; and terrestrial photogrammetry to photographically record and draw every detail of the amphitheatre exposed in previous excavations.