Ozan Formation

Ozan Formation
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
Location
Region	Arkansas, Oklahoma
Country	United States
Type section
Named by	C.H. Dane

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

Paleofauna

Ostracods

Alatacythere

A. ponderosana

Amphicytherura

A. dubia

Bairdoppilata

B. rotunda

Brachycythere

B. ledaforma

B. rhomboidalis

B. sphenoides

Bythocypris

B. windhami

Clithrocytheridea

C. fabaformis

Cythereis

C. bicornis

C. caudata

C. communis

C. costatana

C. dallasensis

C. hannai

C. paraustinensis

C. plummeri

C. spoori

C. verricula

Cytherella

C. austinensis

Cytherelloidea

C. crafti

C. ozanana

C. spiralia

C. tollettensis

Cytheropteron

C. blakei

Haplocytheridea

H. bruceclarki

H. councilli

H. globosa

H. insolita

H. micropunctata

H. plummeri

Krithe

K. cushmani

K. postprojecta

Loxoconcha

L. fletcheri

Monoceratina

M. montuosa

M. pedata

M. prothroensis

Orthonotacythere

O. hannai

Phacorhabdotus

P. texanus

Pterygocythere

P. saratogana

Veenia

V. arachoides

V. gapensis

V. ozanana

Velarocythere

V. reesidei

Avians

Hesperornis

Reptiles

Globidens

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)
Another view of the same location (c. 1902)

References

1 2 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.
↑ Dane, C.H. (10 September 1926). "Oil-bearing formations of southwestern Arkansas". U.S. Geological Survey Press Bulletin (8823).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 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.
↑ 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.
↑ Rempert, Trevor; Martens, Brennan; Vinkeles Melchers, Alexander; Rempert, Ashley. "New remains of the mosasaur Globidens alabamaensis from the North Sulphur River of Texas". The Journal of Paleontological Sciences. 11: 1–7. doi:10.5281/zenodo.13324298.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 19 August 2022. Retrieved 17 December 2021.

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[McFarland-1] 1 2 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). "Oil-bearing formations of southwestern Arkansas". U.S. Geological Survey Press Bulletin (8823).

[Collins1960-3] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 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.

[5] Rempert, Trevor; Martens, Brennan; Vinkeles Melchers, Alexander; Rempert, Ashley. "New remains of the mosasaur Globidens alabamaensis from the North Sulphur River of Texas". The Journal of Paleontological Sciences. 11: 1–7. doi:10.5281/zenodo.13324298.