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.Cuesta de Iscayachi at Fossilworks.orgCuesta de Erquis at Fossilworks.orgCieneguillas at Fossilworks.org
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
References
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