San Lorenzo Formation, Bolivia

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.

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.