| Columbus Limestone | |
|---|---|
| Stratigraphic range: Devonian | |
 Etched section of hand sample of Columbus Limestone from Kelleys Island | |
| Type | Sedimentary |
| Unit of | Onondaga Group |
| Sub-units | Bellepoint, Marblehead, Tioga Ash Bed, Venice, Delhi, Klondike, East Liberty |
| Underlies | Bass Islands Formation, Delaware Formation, and Ohio Shale |
| Overlies | Lucas Formation |
| Thickness | 0 to 105 feet[1] |
| Lithology | |
| Primary | Limestone |
| Other | Sandstone |
| Location | |
| Region | Cincinnati Arch of North America |
| Extent | Ohio, Pennsylvania, Virginia, Ontario |
| Type section | |
| Named for | Columbus, Ohio |
| Named by | Mathur, 1859 |
The Columbus Limestone is a mapped bedrock unit consisting primarily of fossiliferous limestone. It occurs in Ohio, Pennsylvania, and Virginia in the United States, and in Ontario, Canada.
- ^ Columbus Limestone, Mineral Resources On-Line Spatial Data, United States Geological Survey https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=OHDc%3B0