The Santiago Formation is a Sandbian to Katian geologic formation of central Bolivia. The formation comprises gray quartzitic siltstones.
Fossil content The formation has provided the following fossils: Bistramia sp. Lingula sp. Orthoceras sp.
See also List of fossiliferous stratigraphic units in Bolivia
References
Further reading R. Suárez Soruco. 1976. El sistema ordovícico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123