Asprochaliko is a rockshelter in the valley of the
, 20 m. above the present river bank, close to the village of Aghios Georghios. The importance of the site lies in the fact that it was continuously used by nomad hunter-gatherers during the Middle and Upper Palaeolithic period.
The rockshelter was excavated between 1964-1966 by the British School of Archaeology under the direction of E.S. Higgs. The excavations revealed a sequence of deposits, some 5 m. thick. The lower part of the stratification (strata 19-16) dates to 100.000 B.P. and yielded Middle Palaeolithic industries (Mousterians), with a great percentage of blade-like artifacts. The next stratum (14), dated to ca. 40.000 B.P., is also characterized by Middle Palaeolithic industries (Micromousterian) with small, flake tools. The upper part of the deposit (strata 10, 7, 4) yielded Upper Palaeolithic industries with small bladelet tools, dated to ca. 26.000 B.P.