Anzaldo Formation Explained

Anzaldo Formation
Type:	Geological formation
Period:	Katian
Age:	Katian ~
Prilithology:	Sandstone
Region:	Cochabamba Department
Coordinates:	-17.8°N -65.8°W
Paleocoordinates:	-45.1°N -127.5°W
Unitof:	Cochabamba Group
Underlies:	San Benito Formation
Overlies:	Capinota Formation
Extent:	Cordillera Oriental

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]

Fossil content

The formation has provided the following fossils:

Fish

Pteraspidomorphi

• Huemacaspis bistrami^[2]
• Sacabambaspis janvieri^{[3] [4]}

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

• List of fossiliferous stratigraphic units in Bolivia
• Cancañiri Formation
• La Ciénega Formation
• Santiago Formation

References

Bibliography

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Anzaldo&group_formation_member=Anzaldo Anzaldo Formation
2. Emig & Herrera, 2006
3. Gagnier et al., 1996
4. Pradel et al., 2007
5. Branisa, 1965