The Anzaldo Formation is a
Katian
The Katian is the second stage of the Upper Ordovician. It is preceded by the Sandbian and succeeded by the Hirnantian Stage. The Katian began million years ago and lasted for about 7.8 million years until the beginning of the Hirnantian million ...
geologic
formation
Formation may refer to:
Linguistics
* Back-formation, the process of creating a new lexeme by removing or affixes
* Word formation, the creation of a new word by adding affixes
Mathematics and science
* Cave formation or speleothem, a secondar ...
of central Bolivia. The formation belongs to the
Cochabamba Group, overlies the
Capinota Formation and is overlain by the
San Benito Formation.
[Anzaldo Formation]
at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...
.org
Fossil content
The formation has provided the following fossils:
Fish
;Pteraspidomorphi
* ''
Huemacaspis bistrami''
[Emig & Herrera, 2006]
* ''
Sacabambaspis janvieri''
[Gagnier et al., 1996][Pradel et al., 2007]
Trilobites
* ''
Leiostegina inexpectans''
[Branisa, 1965]
Bivalves
* ''
?Grammysia sp.''
[
* '' ?Modiomorpha sp.''][
* '' ?Parallelodon sp.''][
* '' "Ctenodonta" sp.''][
* '' "Goniophorina" sp.''][
]
Gastropods
* '' Gyrospira tourteloti''[
]
Lingulida
* '' Bistramia elegans''[
* '' Dignomia munsterii''][
]
See also
* List of fossiliferous stratigraphic units in Bolivia
This is a list of fossiliferous stratigraphic units in Bolivia.
__NOTOC__
List of fossiliferous stratigraphic units
See also
*
* Gomphothere fossils in Bolivia
* South American land mammal ages
* List of fossiliferous stratigraphic un ...
* Cancañiri Formation
The Cancañiri Formation, also named as Cancañiri Tillite, is a Katian to Hirnantian geologic formation of central Bolivia. The pebbly, argillaceous sandstones, shales and siltstones of the up to thick formation,Díaz Martínez, 2005, p.237 were ...
* La Ciénega Formation
* Santiago Formation
References
Bibliography
*
*
*
* {{cite LSA , last=Branisa , first=L , year=1965 , title=Los fósiles guias de Bolivia: I. Paleozoico , journal= Boletín de Servicio Geologico de Bolivia La Paz, Bolivia , volume=6 , pages=1–282
Geologic formations of Bolivia
Ordovician System of South America
Ordovician Bolivia
Katian
Sandstone formations
Shallow marine deposits
Ordovician southern paleotemperate deposits
Paleontology in Bolivia
Formations