title: San Lorenzo Formation, Bolivia
text: # 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.
  