Asprochaliko is a rock shelter in the Louros valley, 20 m above the level of today's riverbed, near Aghios Georgios (Kokkinopilos). Oriented to the south and measuring 22 x 3.5 m, its uniqueness lies in its use during both the Middle and Upper Palaeolithic by nomadic hunters — two of the three phases of the Palaeolithic period.
It was excavated between 1964 and 1966 by the British Archaeological School under E.S. Higgs of the University of Cambridge. The excavation revealed a complex stratification some 5 m thick representing at least three cultural phases: the Lower Mousterian (dated by thermoluminescence to c. 100,000 BP), the Upper Mousterian or Micromousterian (c. 39,000 BP) and the Upper Palaeolithic (c. 26,000 BP).
The remains of human activity comprise hundreds of thousands of flint tools and bone samples, most of the stone tools made from flint of the neighbouring Louros valley. The fauna ranges from noble deer and rhinoceros in the Lower Mousterian to various deer and, in the Upper Palaeolithic, sheep and goats.
