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 | |
_(Ozan_Formation,_Upper_Cretaceous;_eastern_Texas,_USA)_1.jpg) 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[1] |
| Location | |
| Region | Arkansas, Oklahoma |
| Country | United States |
| Type section | |
| Named by | C.H. Dane[2] |
Paleofauna
edit- A. ponderosana[3]
- A. dubia[3]
- B. rotunda[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. blakei[3]
- L. fletcheri[3]
- O. hannai[3]
- P. texanus[3]
- P. saratogana[3]
- V. reesidei[3]
Outcrops
edit-
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)
See also
edit
References
edit- ^ 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.
- ^ Dane, C.H. (10 September 1926). U.S. Geological Survey Press Bulletin (8823).
{{cite journal}}: Missing or empty|title=(help) - ^ 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.
- ^ 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.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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