Pircancha Formation

Pircancha Formation
Stratigraphic range: Floian-Dapingian ~478–466 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Thickness	1,800 m (5,900 ft)
Lithology
Primary	Mudstone
Other	Shale, sandstone, pyrite
Location
Coordinates	21°00′S 65°00′W / 21.0°S 65.0°W / -21.0; -65.0
Approximate paleocoordinates	45°18′S 129°06′W / 45.3°S 129.1°W / -45.3; -129.1
Region	Tarija Department
Country	Bolivia
Pircancha Formation (Bolivia)

The Pircancha Formation is a Floian to Dapingian geologic formation of southern Bolivia. The green mudstones, shales and sandstones were deposited in a shallow to open marine environment. The fossil Pircanchaspis rinconensis is named after the formation.

Fossil content

The formation has provided the following fossils:

See also

• List of fossiliferous stratigraphic units in Bolivia

References

Further reading

• B.-D. Erdtmann, B. Weber, H.-P. Schultze and S. Egenhoff. 2000. A possible agnathan plate from the lower Arenig (Lower Ordovician) of South Bolivia. Journal of Vertebrate Paleontology 20(2):394-399
• M. Toro and S. Fernandez. 1979. Los fósiles de la formación Pircancha aflorante en Chilcayo, Provincia Méndez - Depto. Tarija. Revista de la Academia Nacional de Ciencas de Bolivia 163-169