Salem Limestone
| Salem Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
Fossil red algae on Salem Limestone from Kentucky | |
| Type | Formation |
| Unit of | Sanders Group, Meramec Group |
| Underlies | St. Louis Limestone |
| Overlies | Harrodsburg Limestone Warsaw Formation |
| Lithology | |
| Primary | Limestone |
| Location | |
| Region | Illinois, Indiana, Kentucky, and Missouri |
| Country | United States |
| Type section | |
| Named for | Salem, Washington County, Indiana |
The Salem Formation is a geologic formation in Illinois, Indiana, Kentucky, and Missouri. It preserves fossils dating back to the Mississippian subperiod. This formation is quarried and used as a building material, known as "Indiana limestone", also called Bedford limestone.