Smithville Formation
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| Smithville Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Sub-units | Black Rock Limestone Member |
| Underlies | Everton Formation |
| Overlies | Powell Formation |
| Lithology | |
| Primary | dolomite |
| Location | |
| Region | Arkansas |
| Country | United States |
| Type section | |
| Named for | Smithville, Lawrence County, Arkansas[1] |
| Named by | Edward Oscar Ulrich[2] |
The Smithville Formation or Smithville Dolomite is a geologic formation in Arkansas. It preserves fossils dating back to the Ordovician period.
