Tucumilla Formation

The Tucumilla Formation is a Tremadocian geologic formation of southern Bolivia. The sandstones, shales and siltstones crop out in the José María Avilés and Eustaquio Méndez Provinces.

Tucumilla Formation
Stratigraphic range: Tremadocian ~
Type	Geological formation
Lithology
Primary	Sandstone
Other	Shale, siltstone
Location
Coordinates	21.0°S 65.0°W / -21.0; -65.0
Approximate paleocoordinates	47.2°S 127.7°W / -47.2; -127.7
Region	Tarija Department
Country	Bolivia
Tucumilla Formation (Bolivia)

Fossil content

The formation has provided the following fossils:

• Apheoorthis samensis
• Notorthisina notoconcha
• Angelina sp.
• Asaphellus sp.
• Broeggeria sp.
• Bucania sp.
• Dictyonema sp.
• Finkelnburgia sp.
• Jujuyaspis sp.
• Kainella sp.
• Leptoplastides sp.
• Micragnostus sp.
• Parabolina sp.
• Richardsonella sp.
• Shumardia sp.
• Tropidodiscus sp.

See also

• List of fossiliferous stratigraphic units in Bolivia

Further reading

• V. Havlicek and L. Branisa. 1980. Ordovician brachiopods of Bolivia: Succession of assemblages, climate control, affinity to Anglo-French and Bohemian provinces. Rozpravy Ceskoslovenske Akademie Ved. Rada Matematickych a Prirodnich Ved. Academia Praha, Prague, Czechoslovakia 90(1):1-54
• A. Pribyl and J. Vanek. 1980. Ordovician trilobites of Bolivia. Rozpravy Ceskoslovenske Akademie Ved. Rada Matematickych a Prirodnich Ved. Academia Praha, Prague, Czechoslovakia 90(2):1-90