The San Lorenzo Formation is a Dapingian geologic formation of southern Bolivia. The dark gray, greenish, and black shale with thin intercalations of white-yellow quartzites were deposited in an open marine submarine fan environment.Camargo Syncline at Fossilworks.orgCamargo Syncline 2 at Fossilworks.org
Fossil content The formation has provided the following fossils:
Didymograptus nitidus Dinorthis obispoensis Orthambonites calligramma Peelerophon oehlerti Tetragraptus quadribrachiatus Thysanopyge argentina Yutagraptus vdeflexus Phyllograptus cf. typus Dictyonema sp. Endoceras sp. Lecanospira sp. Megalaspidella sp. Pachendoceras 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