Brazil Formation
The Brazil Formation is a geologic formation in Indiana consisting of shale, sandstone, clay, and coal. It preserves fossils dating back to the Carboniferous period
| Brazil Formation | |
|---|---|
| Stratigraphic range: Pennsylvanian | |
| Type | Formation |
| Unit of | Raccoon Creek Group |
| Underlies | Staunton Formation |
| Overlies | Mansfield Formation |
| Location | |
| Region | Indiana |
| Country | United States |
Description
The Brazil Formation was named in 1902 for the city of Brazil, located in Clay County, Indiana. It originally included rocks between the bottom of the Petersburg Coal and the top of the Mansfield Sandstone. In 1922, a new survey resulted in restrictions to include only rocks between the Lower Block Coal Member and what was at the time called Coal II. In 1976, it was amended again to include rocks between the upper part of Minshall Coal Member and the lower part of Lower Block Coal Member.
The formation is made up of shale, sandstone, clay, and coal. Thickness is measured between 40 and 90 feet.[1]
References
- Hutchison, Harold C. "Brazil Formation". Indiana Geological and Water Survey. University of Indiana Bloomington. Retrieved 11 October 2021.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.