Charco Azul Formation is a
geologic formation of the
Charco Azul Group in western
Panama and southeastern
Costa Rica
Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...
. It preserves
gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the
Pliocene period.
[Charco Azul Formation]
at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...
.org
Description
The Charco Azul Formation comprises
tuffaceous
shales deposited in a deep marine
environment
Environment most often refers to:
__NOTOC__
* Natural environment, all living and non-living things occurring naturally
* Biophysical environment, the physical and biological factors along with their chemical interactions that affect an organism or ...
The formation unconformably underlies the
Armuelles Formation. The formation is correlated to the
Jama and
Canoa Formations of
Ecuador.
[
]
Fossil content
These fossils have been reported from the formation:[
* '' Strombina (Recurvina) penita'', '' Strombina (Recurvina) recurva''
* '' Distorsio decussata''
* '']Marsupina bufo
''Marsupina bufo'', common name the chestnut frog shell, is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.
Distribution
This species is distributed in the Gulf of Mexico, the Caribbean Sea and the L ...
'', '' M. nana''
See also
*
* List of fossiliferous stratigraphic units in Panama
References
{{reflist
Further reading
* P. Jung. 1989. Revision of the Strombina-group (Gastropoda; Columbellidae), fossil and living. Schweierische Paläontologische Abhandlungen 111:1-298
Geologic formations of Costa Rica
Neogene Costa Rica
Geologic formations of Panama
Neogene Panama
Shale formations
Tuff formations
Deep marine deposits
Formations