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.[1][2][3]
| Tucumilla Formation Stratigraphic range: Tremadocian ~488–479 Ma | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Other | Shale, siltstone |
| Location | |
| Coordinates | 21.0°S 65.0°W |
| Approximate paleocoordinates | 47.2°S 127.7°W |
| 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.
References
- Cuesta de Iscayachi at Fossilworks.org
- Cuesta de Erquis at Fossilworks.org
- Cieneguillas at Fossilworks.org
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
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