| Tucumilla Formation | |
|---|---|
| Stratigraphic range: Tremadocian ~488–479 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Other | Shale, siltstone |
| Location | |
| Coordinates | 21°00′S 65°00′W / 21.0°S 65.0°W / -21.0; -65.0 |
| Approximate paleocoordinates | 47°12′S 127°42′W / 47.2°S 127.7°W / -47.2; -127.7 |
| Region | Tarija Department |
| Country |  Bolivia |
  Tucumilla Formation (Bolivia) | |
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.
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
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