Raccoon Creek Group
| Raccoon Creek Group | |
|---|---|
| Stratigraphic range: Carboniferous | |
| Type | Group |
| Sub-units | |
| Location | |
| Region | Indiana |
| Country | United States |
The Raccoon Creek Group is a geologic group in Indiana. It preserves fossils dating back to the Carboniferous period.
Stratigraphy
[edit | edit source]Brazil Formation
[edit | edit source]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
Description
[edit | edit source]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]
Caseyville Formation
[edit | edit source]The Caseyville Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Carboniferous period.
Mansfield Formation
[edit | edit source]The Mansfield Formation is a geologic formation in Indiana. It preserves fossils dating back to the Carboniferous period.
Tradewater Formation
[edit | edit source]The Tradewater Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Carboniferous period .
Staunton Formation
[edit | edit source]The Staunton Formation is a geologic formation in Indiana [2] consisting of sandstone, shale, and coalbeds.[3][4]
Description
[edit | edit source]The formation was named by E. R. Cumings to refer to the exposed rocks found near Staunton, Clay County. Later surveys resulted in the inclusion of the Perth Limestone Member into the Staunton Formation, having previously belonged to the Brazil Formation.
The Staunton Formation is made up of sandstone and shale (75 to 150 feet), and coalbeds (up to 8).[3]
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Generalized Stratigraphic Column of Indiana Bedrock
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
