San Lorenzo Formation, Bolivia

San Lorenzo Formation
Stratigraphic range: Dapingian
~478–466 Ma

PreЄ

Type| Geological formation
Lithology
Primary| Shale, sandstone
Other| Quartzite
Location
Coordinates|  [ ⚑ ] : 21°00′S 65°00′W﻿ / ﻿21.0°S 65.0°W﻿ / -21.0; -65.0
Paleocoordinates|  [ ⚑ ] 45°18′S 129°06′W﻿ / ﻿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 (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.[1][2]

## Contents

* 1 Fossil content
* 2 See also
* 3 References
* 4 Further reading

## 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

1. ↑ Camargo Syncline at Fossilworks.org
2. ↑ Camargo Syncline 2 at Fossilworks.org

## Further reading

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

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