San Lorenzo Formation, Bolivia

For other uses, see San Lorenzo Formation.

San Lorenzo Formation
Stratigraphic range: Dapingian ~
Type	Geological formation
Lithology
Primary	Shale, sandstone
Other	Quartzite
Location
Coordinates	21.0°S 65.0°W / -21.0; -65.0
Approximate paleocoordinates	45.3°S 129.1°W / -45.3; -129.1
Region	Tarija Department
Country	Bolivia
Type section
Named for	San Lorenzo
San Lorenzo Formation, Bolivia is located in Bolivia San Lorenzo Formation, Bolivia San Lorenzo Formation, Bolivia (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.

See also

• List of fossiliferous stratigraphic units in Bolivia

Further reading

• R. Suárez Soruco. 1976. El sistema ordovícico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123