Analysis of information sources in references of the Wikipedia article "Sabah" in Indonesian language version.
Since 1980, the Sabah Museum staff have carried out excavations in the Madai and Baturong limestone massifs, at caves and open sites dated back 30,000 years. Baturong is surrounded by large area of alluvial deposits, formed by the damming of the Tingkayu River by a lava flow. The Tingkayu stone industry shows a unique level of skills for its period. The remains of many mammals, snakes, and tortoises were found, all food items collected by early occupants of the rock shelters.