Ozan Formation

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Ozan Formation
Stratigraphic range: Cretaceous
File:Baculites (fossil ammonites) (Ozan Formation, Upper Cretaceous; eastern Texas, USA) 1.jpg
Fossil ammonites from the Ozan Formation
TypeFormation
Sub-unitsAustin Group
UnderliesAnnona Chalk
OverliesAustin Chalk, Brownstown Marl
Thickness150 to 250 feet[1]
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named byC.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.

Paleofauna

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Ostracods

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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. postprojecta[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]

Avians

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Reptiles

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Outcrops

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  • Annona Chalk overlying Ozan Formation at what is now called White Cliffs Natural Area, with the Little River in the foreground, Howard County, AR (c. 1910)
    Annona Chalk overlying Ozan Formation at what is now called White Cliffs Natural Area, with the Little River in the foreground, Howard County, AR (c. 1910)
  • Another view of the same location (c. 1902)
    Another view of the same location (c. 1902)

See also

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References

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