Barreirinha Formation
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Not to be confused with Barreirinhas Formation.
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]
Quick Facts Type, Lithology ...
Barreirinha Formation | |
---|---|
Stratigraphic range: late Frasnian ~380–376 Ma | |
Type | Geological formation |
Lithology | |
Primary | Black shale |
Other | Sandstone, pyrite |
Location | |
Coordinates | 4.1°S 58.0°W / -4.1; -58.0 |
Approximate paleocoordinates | 64.3°S 36.4°W / -64.3; -36.4 |
Region | Amazonas |
Country | Brazil |
Extent | Amazon Basin |
Type section | |
Named for | Barreirinha |
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