Ozan Formation

The Ozan Formation is a geologic formation in Arkansas, Oklahoma[1] and Texas. It preserves fossils dating back to the Cretaceous period.

Ozan Formation
Stratigraphic range: Cretaceous
Fossil ammonites from the Ozan Formation
TypeFormation
Sub-unitsAustin Group
UnderliesAnnona Chalk
OverliesAustin Chalk
Thickness150 to 250 feet[1]
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named byC.H. Dane[2]

Paleofauna

Ostracods
  • Alatacythere
A. ponderosana[3]
  • Amphicytherur
A. dubia[3]
  • Bairdoppilata
B. rotunda[3]
  • Brachycythere
B. ledaforma[3]
B. rhomboidalis[3]
B. sphenoides[3]
  • Bythocypris
B. windhami[3]
  • Clithrocytheridea
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]
  • Cytherelloidea
C. crafti[3]
C. ozanana[3]
C. spiralia[3]
C. tollettensis[3]
  • Cytheropteron
C. blakei[3]
  • Haplocytheridea
H. bruceclarki[3]
H. councilli[3]
H. globosa[3]
H. insolita[3]
H. micropunctata[3]
H. plummeri[3]
  • Krithe
K. cushmani[3]
K. postporjecta[3]
  • Loxoconcha
L. fletcheri[3]
  • Monoceratina
M. montuosa[3]
M. pedata[3]
M. prothroensis[3]
  • Orthonotacythere
O. hannai[3]
  • Phacorhabdots
P. texanus[3]
  • Pterygocythere
P. saratogana[3]
  • Veenia
V. arachoides[3]
V. gapensis[3]
V. ozanana[3]
  • Velarocythere
V. reesidei[3]

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Avians

See also

References
  1. McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 29. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-12.
  2. Dane, C.H. (10 September 1926). U.S. Geological Survey Press Bulletin (8823). {{cite journal}}: Missing or empty |title= (help)
  3. Collins, Jr., Robert J. (June 1960). Stratigraphy and Ostracoda of the Ozan, Annona, and Marlbrook Formations of southwestern Arkansas (PhD). Louisiana State University and Agricultural and Mechanical College.
  4. Bell, Alyssa; Irwin, Kelly J.; Davis, Leo Carson (2015). "Hesperornithiform birds from the Late Creaceous (Campanian) of Arkansas, USA". Transactions of the Kansas Academy of Science. 118 (3/4): 219–229. doi:10.1660/062.118.0305. JSTOR 24887762. S2CID 83921936 – via JSTOR.{{cite journal}}: CS1 maint: date and year (link)


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