The Mari Mari Group is an Eifelian to Frasnian geologic group of the Amazon Basin in the state of Amazonas of northwestern Brazil. The group comprises shales and sandstones.[1]
| Mari Mari Group | |
|---|---|
| Stratigraphic range: Eifelian ~ | |
 Late Devonian paleogeography (380 Ma) | |
| Type | Geological group |
| Lithology | |
| Primary | Shale |
| Other | Sandstone |
| Location | |
| Coordinates | 6°00′S 70°00′W / 6.0°S 70.0°W |
| Approximate paleocoordinates | 59°54′S 61°30′W / 59.9°S 61.5°W |
| Region | Amazonas |
| Country |  Brazil |
| Extent | Amazon Basin |
| Type section | |
| Named for | Marimari River |
  Mari Mari Group (Brazil) | |
Fossil content
editThe formation has provided fossils of Tentaculites sp., foraminifera and ostracods.[1][2]
References
edit- ^ a b Mari Mari Group at Fossilworks.org
- ^ Melo, 1988
Bibliography
edit- Melo, J. H. G (1988), The Malvinokaffric realm in the Devonian of Brazil. N. J. McMillan, A. F. Embry, and D. J. Glass, eds. Devonian of the World, Volume I, Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada, pp. 669–703