The Lower Valley of the Omo is located in south-western Ethiopia. It extends over an area of 165 km2. The age old sedimentary deposits in the Lower Omo Valley are now world renowned for the discovery of many hominid fossils, that have been of fundamental importance in the study of human evolution.

The Lower Omo Valley includes the Konso and Fejej paleontological research locations with sedimentary deposit going back to the plio-pleistocene period. These have produced numerous hominid and animal fossils, including fragments of Australopithecus. The deposits of human vertebrae fauna, and paleo-environmental evolution, shed light on the earliest stages of the origins and development of Homo sapiens of Africa. The discoveries of ancient stone tools in an encampment also offers evidence of the oldest known technical activities of prehistoric beings, thus making the property one of the most significant for mankind.

To ensure Omo’s position as the yardstick against which all other ancient deposits in East Africa are measured, researched evidence from the site has established bio-stratigraphical, radiometric and magneto-stratigraphical scales spanning between one and 3.5 million years.

Since 1966, scientific research has proved that the site significantly contributes to prominent archaeological, geological, paleo-anthropological and paleo-environmental studies.