Sella Formation

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Sella Formation
Stratigraphic range: Dapingian-Darriwilian
~478–450 Ma
TypeGeological formation
Lithology
PrimarySiltstone, sandstone
OtherShale, limestone, coquina
Location
Coordinates21°24′S 64°36′W / 21.4°S 64.6°W / -21.4; -64.6Coordinates: 21°24′S 64°36′W / 21.4°S 64.6°W / -21.4; -64.6
Approximate paleocoordinates42°48′S 131°36′W / 42.8°S 131.6°W / -42.8; -131.6
RegionTarija Department
Country Bolivia
Sella Formation is located in Bolivia
Sella Formation
Sella Formation
Sella Formation (Bolivia)

The Sella Formation is a Dapingian to Darriwilian geologic formation of southern Bolivia. The grey to green bioturbated siltstones interbedded with thin sandstone layers bear lenticular shell beds. Other parts of the formation contain yellow-green limy shales and grey sandy limestones. Coquinas often fill gutter casts and included brachiopods, trilobites, bivalves and nautiloids. The sediments were deposited in an open marine environment.[1][2][3][4][5] The species was named after the formation.

Fossil content[]

The formation has provided the following fossils:

See also[]

References[]

  1. ^ Sella C at Fossilworks.org
  2. ^ Pantipampa, 3 kilometers east of Belle Vista at Fossilworks.org
  3. ^ Sella, Bed 1 at Fossilworks.org
  4. ^ Sella at Fossilworks.org
  5. ^ Sella Bed 4 at Fossilworks.org
  6. ^ Suárez Riglos et al., 2018, p.64

Bibliography[]

  • Suárez Riglos, Mario; Alejandra Dalenz Farjat, and Miguel Ángel Pérez Leyton. 2018. Fósiles y Facies de Bolivia, 1–146. Sincronía Diseño & Publicidad, Santa Cruz de la Sierra. Accessed 2019-03-03.ISBN 978-99974-79-68-6

Further reading[]

  • C. Babin and L. Branisa. 1987. Ribeiria, Peelrophon y otros molluscos del Ordovícico de Bolivia. 4˚ Congreso Latinoamericano de Paleontología 1:119-129
  • L. Branisa. 1965. Los fosiles guias de Bolivia: I. Paleozoico. Boletin de Servicio Geologico de Bolivia. La Paz, Bolivia 6:1-282
  • 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
  • T. M. Sánchez and C. Babin. 2005. Lower Ordovician bivalves from southern Bolivia: paleobiogeographic affinities. Ameghiniana 42(3):559-566
  • R. Suárez Soruco. 1976. El sistema ordovícico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123
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