Mari Mari Group
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| 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) | |
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]