Tulor discoveries consist of many items from boreholes to human remains. Boreholes are the circular walls made out of clay, dug into the earth to find water. In June 1974 archaeologists put the boreholes in order of stratigraphy so they can find out more about how the population disappeared that was once there. The stratigraphy helped in finding out why the population disappeared, which was not due by climatic changes but to an increase in drought. On site they found lithic, human bones, animal bones, ceramic, carbon, and seashells buried in the ground. All these artifacts are considered to be from the mesolithic era.[2]