A Pleistocene industry of stone tools in terrace deposits of the upper Irrawaddy River in Burma. The culture was characterized by primitive pebble tools (choppers, chopping tools) and a poor flakes made of silicifed tuff and fossil wood. The earliest assemblages may be of Middle Pleistocene date and the industry may have continued into the early Holocene. The Early Anyathian had single-edged core implements associated with crude flake implements. In the Late Anyathian, smaller and better made core and flake artifacts are found.