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 nitidusDinorthis obispoensisOrthambonites calligrammaPeelerophon oehlertiTetragraptus quadribrachiatusThysanopyge argentinaYutagraptus vdeflexusPhyllograptus cf. typusDictyonema sp.Endoceras sp.Lecanospira sp.Megalaspidella sp.- ''Pachendoceras sp.''