The Paoli Formation, Paoli Limestone, or Paoli Chert is a geologic formation in Indiana, Illinois, Kentucky and Missouri. This formation contains members that are known hydrocarbon reservoirs.[1]
| Paoli Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
_1.jpg) Carter Cave Flint (Kentucky), attributed to the Paoli Limestone | |
| Type | Formation |
| Unit of | Blue River Group, St. Louis Group |
| Sub-units | |
| Underlies | Bethel Formation |
| Overlies | Ste. Genevieve Limestone |
| Location | |
| Region | |
| Country | United States |
Stratigraphy
editDowneys Bluff Member
editThe Downeys Bluff Member is the uppermost or top member. It is grey, light to medium in hue. The limestone is fairly clean, with small amounts of clay and shale. It contains a variety of textures, the most noted are micritic, oolitic and skeletal.[2]
Popcorn Sandstone Member
editPopcorn Sandstone Member or Popcorn Sandstone Bed is the lowest member of the Paoli and marks the base of the Chesterian Series. It is not found throughout the entire Paoli. The Popcorn is sometimes included with the Aux Vases Member in other areas it is its own separate member.[3]
References
edit- ^ Zuppann, Charles W.; Parke, Mary A.; Droste, John B. (2009). Complex Lithofacies Relationships between the Ste. Genevieve and Paoli Limestones: Clarifying Reservoir Relationships in the Indiana Subsurface (Thesis). Retrieved 13 February 2024.
- ^ "Downeys Bluff Member". legacy.igws.indiana.edu. Retrieved 2024-02-13.
- ^ "Popcorn Member". legacy.igws.indiana.edu. Retrieved 2024-02-15.
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