| Ozan Formation | |
|---|---|
| Stratigraphic range: Cretaceous | |
|   Fossil ammonites from the Ozan Formation  | |
| Type | Formation | 
| Sub-units | Austin Group | 
| Underlies | Annona Chalk | 
| Overlies | Austin Chalk, Brownstown Marl | 
| Thickness | 150 to 250 feet [1] | 
| Location | |
| Region | Arkansas, Oklahoma | 
| Country | United States | 
| Type section | |
| Named by | C.H. Dane [2] | 
The Ozan Formation is a geologic formation in Arkansas, Oklahoma [1] and Texas. It preserves fossils dating back to the Cretaceous period.