Barreirinha Formation
| Barreirinha Formation | |
|---|---|
| Stratigraphic range: late Frasnian ~ | |
 Late Devonian paleogeography (380 Ma) | |
| Type | Geological formation |
| Lithology | |
| Primary | Black shale |
| Other | Sandstone, pyrite |
| Location | |
| Coordinates | 4°06′S 58°00′W / 4.1°S 58.0°W |
| Approximate paleocoordinates | 64°18′S 36°24′W / 64.3°S 36.4°W |
| Region | Amazonas |
| Country | Brazil |
| Extent | Amazon Basin |
| Type section | |
| Named for | Barreirinha |
  Barreirinha Formation (Brazil) | |
The Barreirinha Formation is a late Frasnian geologic formation of the Amazon Basin in the state of Amazonas of northern Brazil. The group comprises deep marine black shales and sandstones.[1]
Fossil content
The formation has provided conodont fossils of:[1][2]
- Mehlina gradata
- Ozarkodina aff. sannemanni
- Cryptotaxis sp.
- Polygnathus sp.
- ?Prioniodina sp.
References
- 1 2 Barreirinha Formation at Fossilworks.org
- ↑ Cardoso, 2015
Bibliography
- Cardoso, C. N.; Sanz López, J.; Blanco Ferrera, S.; Lemos, V. B.; Scomazzon, A. K. (2015), "Frasnian conodonts at high palaeolatitude (Amazonas Basin, north Brazil)", Palaeogeography, Palaeoclimatology, Palaeoecology, 418: 57–64, Bibcode:2015PPP...418...57C, doi:10.1016/j.palaeo.2014.11.007, hdl:10651/30176