The Cha-Kjeri Formation is an Eifelian geologic formation of central Bolivia. The formation comprises red sandstones deposited in a marine environment.USNM loc. 17905 - Isaacson field locality 18 at Fossilworks.org
Fossil content The formation has provided fossils of Globithyris aff. diana.
See also List of fossiliferous stratigraphic units in Bolivia
References
Further reading P. E. Isaacson. 1977. Devonian stratigraphy and brachiopod paleontology of Bolivia. part A: Orthida and Strophomenida. Palaeontographica Abteilung A 155(5–6):133-192