Ozan Formation

Ozan Formation
Stratigraphic range: Cretaceous
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

Ostracods

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]

Avians

Outcrops

  • 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

References

  1. ^ a b 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. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq 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.


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