Charco Azul Formation
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| Charco Azul Formation | |
|---|---|
| Stratigraphic range: Pliocene | |
| Type | Formation |
| Unit of | Charco Azul Group |
| Underlies | Armuelles Formation |
| Lithology | |
| Primary | Shale |
| Other | Tuff |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Approximate paleocoordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Chiriquí Province |
| Country | Costa Rica, Panama |
| Type section | |
| Named for | Charco Azul |
Charco Azul Formation (Panama) | |
Charco Azul Formation is a geologic formation of the Charco Azul Group in western Panama and southeastern Costa Rica. It preserves gastropod fossils dating back to the Pliocene period.[1]
Description
[edit | edit source]The Charco Azul Formation comprises tuffaceous shales deposited in a deep marine environment The formation unconformably underlies the Armuelles Formation. The formation is correlated to the Jama and Canoa Formations of Ecuador.[1]
Fossil content
[edit | edit source]These fossils have been reported from the formation:[1]
- Strombina (Recurvina) penita, Strombina (Recurvina) recurva
- Distorsio decussata
- Marsupina bufo, M. nana
See also
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- List of fossiliferous stratigraphic units in Costa Rica
- List of fossiliferous stratigraphic units in Panama
References
[edit | edit source]- ^ a b c Charco Azul Formation at Fossilworks.org
Further reading
[edit | edit source]- P. Jung. 1989. Revision of the Strombina-group (Gastropoda; Columbellidae), fossil and living. Schweierische Paläontologische Abhandlungen 111:1-298