The Usno Formation is a palaeontological formation located in Ethiopia. It dates to the Pliocene period.Boaz, N. T., Howell, F. C., & McCrossin, M. L. (1982). Faunal age of the Usno, Shungura B and Hadar Formations, Ethiopia. Nature, 300(5893), 633–635. https://doi.org/10.1038/300633A0
Geology
Paleofauna
See also List of fossil sites List of fossiliferous stratigraphic units in Ethiopia
References
(1993); Wildlife of Gondwana. Reed.