Mari Mari Group

Short description: Geologic group of the Amazon Basin in the state of Amazonas of northwestern Brazil

Mari Mari Group
Stratigraphic range: Eifelian
~392–384 Ma

PreЄ

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 / -6.0; -70.0
Paleocoordinates|  [ ⚑ ] 59°54′S 61°30′W﻿ / ﻿59.9°S 61.5°W﻿ / -59.9; -61.5
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]

## Fossil content

The formation has provided fossils of Tentaculites sp., foraminifera and ostracods.[1][2]

## References

1. ↑ 1.0 1.1 Mari Mari Group at Fossilworks.org
2. ↑ Melo, 1988

### Bibliography

* 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, 669–703. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada.

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