Roubidoux Formation
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TypeFormation
UnderliesJefferson City Formation in the Missouri Ozarks
OverliesGasconade Formation[1]
Thickness100 to 300 feet[2]
| Roubidoux Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
 Outcrop of Roubidoux sandstone in the Missouri Ozarks | |
| Type | Formation |
| Underlies | Jefferson City Formation in the Missouri Ozarks |
| Overlies | Gasconade Formation[1] |
| Thickness | 100 to 300 feet[2] |
| Lithology | |
| Primary | Sandstone |
| Other | dolomite, chert |
| Location | |
| Coordinates | 36°54′N 92°34′W / 36.90°N 92.57°W |
| Region | Missouri |
| Country | United States |
| Type section | |
| Named for | Roubidoux Creek, Texas and Pulaski counties, Missouri[2] |
The Roubidoux Formation is a geologic formation in the Ozarks of Missouri. It preserves fossils dating back to the Ordovician period.
