Anzaldo Formation

The Anzaldo Formation is a Katian geologic formation of central Bolivia. The formation belongs to the Cochabamba Group, overlies the Capinota Formation and is overlain by the San Benito Formation.[1]

Anzaldo Formation
Stratigraphic range: Katian
~
TypeGeological formation
Unit ofCochabamba Group
UnderliesSan Benito Formation
OverliesCapinota Formation
Lithology
PrimarySandstone
Location
Coordinates17.8°S 65.8°W / -17.8; -65.8
Approximate paleocoordinates45.1°S 127.5°W / -45.1; -127.5
RegionCochabamba Department
Country Bolivia
ExtentCordillera Oriental
Anzaldo Formation (Bolivia)

Fossil content

The formation has provided the following fossils:

Fish
Pteraspidomorphi

Trilobites
  • Leiostegina inexpectans[5]

Bivalves
  • ?Grammysia sp.[5]
  • ?Modiomorpha sp.[5]
  • ?Parallelodon sp.[5]
  • "Ctenodonta" sp.[5]
  • "Goniophorina" sp.[5]

Gastropods
  • Gyrospira tourteloti[5]

Lingulida
  • Bistramia elegans[3]
  • Dignomia munsterii[2][3]

See also

References
  1. Anzaldo Formation at Fossilworks.org
  2. Emig & Herrera, 2006
  3. Gagnier et al., 1996
  4. Pradel et al., 2007
  5. Branisa, 1965

Bibliography
  • Pradel, A.; I. J. Sansom; P.-Y. Gagnier; R. Cespedes, and P. Janvier. 2007. The tail of the Ordovician fish Scabambaspis. Biology Letters 3. 72–75.
  • Emig, C. C., and Z. Herrera. 2006. Dignomia munsterii (Brachiopoda, Lingulata) from the Ordovician of Bolivia, with redescription of the genus. Geodiversitas 28. 227–237.
  • Gagnier, P. Y.; A. Blieck; C. C. Emig; T. Sempere; D. Vachard, and M. Vanguestaine. 1996. New paleontological and geological data on the Ordovician and Silurian of Bolivia. Journal of South American Earth Sciences 9. 329–347.
  • Branisa, L. 1965. Los fósiles guias de Bolivia: I. Paleozoico. Boletín de Servicio Geologico de Bolivia La Paz, Bolivia 6. 1–282.
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