Pircancha Formation
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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:
- Bactroceras boliviensis
- Baltograptus deflexus, B. minutus
- Pircanchaspis rinconensis
- Pseudophyllograptus densus
- Tetragraptus cf. amii
- Didymograptus cf. suecicus
- Basilicus sp.
- Dinorthis sp.
- Famatinolithus sp.
- Geragnostus sp.
- Hoekaspis sp.
- Phyllograptus sp.
- Synhomalonotus sp.
See also
Bibliography
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