| Noix Limestone | |
| Type: | Formation |
| Age: | Ordovician |
| Prilithology: | Oolitic limestone |
| Namedfor: | Outcrops along Noix Creek just south of Louisiana, Pike County, Missouri[1] |
| Region: | Pike County, NE Missouri |
| Country: | United States |
| Unitof: | Edgewood Group |
| Underlies: | Silurian Bryant Knob Formation or Bowling Green Dolomite |
| Overlies: | Maquoketa Shale |
The Noix Limestone is a geologic formation in Missouri. It preserves fossils dating back to the Ordovician period.