Pottery predating the mid-2nd millennium has been found at Asa Koma, an inland lake area on the Gobaad Plain. The site's ware is characterized by punctate and incision geometric designs, which bear a similarity to the Sabir culture phase 1 ceramics from Ma'layba in Southern Arabia. Long-horned humpless cattle bones have likewise been discovered at Asa Koma, suggesting that domesticated cattle were present by around 3,500 years ago. Rock art of what appear to be antelopes and a giraffe are also found at Dorra and Balho. Handoga, dated to the fourth millennium BCE, has in turn yielded obsidian microliths and plain ceramics used by early nomadic pastoralists with domesticated cattle.