Sella Formation | |
---|---|
Stratigraphic range:
Dapingian-
Darriwilian ~ | |
Type | Geological formation |
Lithology | |
Primary | Siltstone, sandstone |
Other | Shale, limestone, coquina |
Location | |
Coordinates | 21°24′S 64°36′W / 21.4°S 64.6°W |
Approximate paleocoordinates | 42°48′S 131°36′W / 42.8°S 131.6°W |
Region | Tarija Department |
Country | 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 Coxiconchia sellaensis was named after the formation.
The formation has provided the following fossils:
Sella Formation | |
---|---|
Stratigraphic range:
Dapingian-
Darriwilian ~ | |
Type | Geological formation |
Lithology | |
Primary | Siltstone, sandstone |
Other | Shale, limestone, coquina |
Location | |
Coordinates | 21°24′S 64°36′W / 21.4°S 64.6°W |
Approximate paleocoordinates | 42°48′S 131°36′W / 42.8°S 131.6°W |
Region | Tarija Department |
Country | 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 Coxiconchia sellaensis was named after the formation.
The formation has provided the following fossils: