La Ciénega Formation is a Sandbian to Katian geologic formation of south-central Bolivia. The formation comprises silty, clayey, micaceous, fine-grained sandstones with thin intercalations of grey-green to light grey shales.
Fossil content The formation has provided the following fossils:
Dinorthis sp. Lingula sp. Lingulepis sp. Orbiculoidea 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
