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

• 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.