Very large basalt mano fragment--rounded on one side, flat on the other. Over 20cm long! Differential levels of corrosion across the tool as the flat side appears to have been more oxidized in the Aragatsiberd ashy destruction level. That (flat) side is only 30% covered in light brown corrosion and has a 5.1cm chunk of oxidized clay and limestone fixed to one margin. The fracture surface and the dorsal, rounded surface are 60% covered in the same light brown corrosion.
Retouch:
Patination: