| Ozan Formation | |
| Type: | Formation |
| Age: | Cretaceous |
| Namedby: | C.H. Dane[1] |
| Region: | Arkansas, Oklahoma |
| Country: | United States |
| Subunits: | Austin Group |
| Underlies: | Annona Chalk |
| Overlies: | Austin Chalk, Brownstown Marl |
| Thickness: | 150 to 250 feet[2] |
The Ozan Formation is a geologic formation in Arkansas, Oklahoma[2] and Texas. It preserves fossils dating back to the Cretaceous period.
A. ponderosana[3]
A. dubia[3]
B. rotunda[3]
B. ledaforma[3]
B. rhomboidalis[3]
B. sphenoides[3]
B. windhami[3]
C. fabaformis[3]
C. bicornis[3]
C. caudata[3]
C. communis[3]
C. costatana[3]
C. dallasensis[3]
C. hannai[3]
C. paraustinensis[3]
C. plummeri[3]
C. spoori[3]
C. verricula[3]
C. austinensis[3]
C. crafti[3]
C. ozanana[3]
C. spiralia[3]
C. tollettensis[3]
C. blakei[3]
H. bruceclarki[3]
H. councilli[3]
H. globosa[3]
H. insolita[3]
H. micropunctata[3]
H. plummeri[3]
K. cushmani[3]
K. postporjecta[3]
L. fletcheri[3]
M. montuosa[3]
M. pedata[3]
M. prothroensis[3]
O. hannai[3]
P. texanus[3]
P. saratogana[3]
V. arachoides[3]
V. gapensis[3]
V. ozanana[3]
V. reesidei[3]