Omo Kibish Formation

The Omo Kibish Formation, located in the Lower Omo Valley of southwestern Ethiopia, is a significant geological formation known for its rich paleoanthropological record. It is divided into four members, Members I-IV, which were deposited between approximately 196,000 and 13,000-4,000 years ago. The site is most notable for the discovery of some of the oldest remains of anatomically modern Homo sapiens, including the Omo I fossil, initially dated to 196,000 years ago and later re-dated to circa 233,000 years ago. The formation has yielded numerous important finds, including stone tools primarily made from high-quality materials such as chert, and faunal remains that provide insight into the ecological and behavioral contexts of early Homo sapiens. The presence of Middle Stone Age lithic assemblages and association with large mammal and fish faunas highlight the complex environmental interactions of early hominins in the region.