Marlbrook Marl

Marlbrook Marl
Stratigraphic range: Cretaceous
Type	Formation
Underlies	Saratoga Formation
Overlies	Annona Chalk
Thickness	50 to 220 feet [1]
Location
Region	Arkansas
Country	United States
Type section
Named by	Robert Thomas Hill [2]

The Marlbrook Marl is a geologic formation in Arkansas. ^[1] It preserves fossils dating back to the Late Cretaceous period.

Paleofauna

Ostracods

Alatacythere A. pondersana [3] [4] Amphicytherura A. dubia [3] [4] Bairdia [4] Bairdoppilata B. pondera [4] Brachycythere B. ledaforma [3] [4] B. ovata [3] [4] B. rhomboidalis [3] [4] Bythocypris B. windhami [3] [4] Clithrocytheridea C. fabaformis [3] Cythereis C. costatana [4] C. hannai [4]

Cytherella C. coryelli [4] C. navarroensis [4] C. scotti [4] Cytherelloidea C. austinensis [4] C. crafti [3] [4] C. greenensis [4] C. spiralia [3] C. tollettensis [3] Cythereis C. communis [3] C. costatana [3] C. filicosta [3] C. pidgeoni [3] C. tuberculifera [3] C. verricula [3] Cytheropteron C. blakei [3] C. castorensis [4] C. harrisi [4]

Echinocythereis E. bartoni [3] [4] Haplocytheridea H. bruceclarki [3] [4] H. councilli [4] H. fabaformis [4] H. globosa [3] H. micropunctata [3] H. monmouthensis [4] H. plummeri [3] [4] Krithe K. cushmani [3] K. swaini [4] Loxoconcha L. fletcheri [3] [4] Monoceratina M. marssonitina [4] M. montuosa [4] M. pedata [3] M. prothroensis [4]

Morrowina [3] Neocythere N. (Neocythere) pseudoconcentrica [4] Orthonotacythere O. (Orthonotacythere) hannai [3] [4] O. (Orthonotacythere) polita [3] [4] Paracypris P. angusta [4] P. goodlandensis [4] Pterygocythere P. saratogana [3] [4] Trachyleberis T. communis [4] T. pideoni [4] Veenia V. arachoides [3] [4] V. ozanana [3] [4] Xestoleberis X. opina [4]

Avians

• Hesperornis ^[5]

See also

• Paleontology portal

• List of fossiliferous stratigraphic units in Arkansas
• Paleontology in Arkansas

References

1. McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 27. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-12.
2. Hill, R.T. (1888). "Arkansas Geological Survey Annual Report for 1888". 2: 72, 84–86.{{cite journal}}: Cite journal requires |journal= (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. Benson, Richard H.; Tatro, James O. (15 Dec 1964). "Faunal description of Ostracoda of the Marlbrook Marl (Campanian), Arkansas". The University of Kansas Paleontological Contributions. Arthropoda, Article 7: 32, 6 pls.
5. 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.

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.