Keyser Hill Sample No. 4 (Eocene of the United States)

Also known as Water Valley

Where: Choctaw County, Alabama (31.9° N, 88.4° W: paleocoordinates 32.4° N, 80.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Cocoa Sand Member (Yazoo Formation), Priabonian (38.0 - 33.9 Ma)

• "Eocene" (the Cocoa Sand is Priabonian)

•the section is "about 20 feet thick" and the sample is from "66' above bridge near Water Valley"

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, fine-grained, glauconitic, quartzose, shelly/skeletal, gray, argillaceous lithology not reported

• "Sandstone; bluish-gray, fine-grained, soft, quartzose, angular, with clay cement, highly fossiliferous, trace of glauconite"

Size class: microfossils

Collected by P. R. Krutak, O. Brown, O. Buis, C. Jones in 1947

• Lousiana State University collection

Primary reference: P. R. Krutak. 1961. Jackson Eocene Ostracoda from the Cocoa Sand of Alabama. Journal of Paleontology 35(4):769-788 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 94156: authorized by John Alroy, entered by John Alroy on 10.02.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Ostracoda
 Platycopida - Cytherellidae
 Podocopida - Leguminocythereidae
 Podocopida - Hemicytheridae
 Podocopida - Trachyleberididae
 Podocopida - Cytheruridae
Cytheropteron montgomeryensis Howe and Chambers 1935 ostracod
 Podocopida - Loxoconchidae
Loxoconcha jacksonensis Howe and Chambers 1935 ostracod
 Podocopida - Cytherettidae
Cytheretta alexanderi Howe and Chambers 1935 ostracod
 Podocopida - Cytherideidae
"Clithrocytheridea grigsbyi" = Cytheridea grigsbyi Howe and Chambers 1935 ostracod
"Clithrocytheridea garretti" = Cytheridea garretti Howe and Chambers 1935 ostracod
"Haplocytheridea montgomeryensis" = Cytheridea montgomeryensis Howe and Chambers 1935 ostracod