Gamoneda Formation

Gamoneda Formation
Stratigraphic range: Emsian ~409–392 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Thickness	~340 m (1,120 ft)
Lithology
Primary	Sandstone, siltstone
Other	Shale
Location
Coordinates	21°30′S 64°48′W / 21.5°S 64.8°W / -21.5; -64.8
Approximate paleocoordinates	66°30′S 98°24′W / 66.5°S 98.4°W / -66.5; -98.4
Region	Tarija Department
Country	Bolivia
Extent	Cordillera Oriental
Type section
Named for	La Gamoneda
Gamoneda Formation (Bolivia)

The Gamoneda Formation is an Emsian geologic formation of southern Bolivia. The approximately 340 metres (1,120 ft) thick formation comprises marine micaceous grey siltstones and burrowed grey sandstones and shales.

Fossil content

The formation has provided the following fossils:

See also

• List of fossiliferous stratigraphic units in Bolivia

References

Further reading

• N. Eldredge and L. Branisa. 1980. Calmoniid trilobites of the Lower Devonian Scaphiocoelia Zone of Bolivia, with remarks on related species. Bulletin of the American Museum of Natural History 165(2):181-289
• P. E. Isaacson. 1977. Devonian stratigraphy and brachiopod paleontology of Bolivia. part A: Orthida and Strophomenida. Palaeontographica Abteilung A 155(5-6):133-192