MGS Loc. 101a - Cleary [Mint Spring Fm] (Oligocene of the United States)

Where: Rankin County, Mississippi (32.2° N, 90.2° W: paleocoordinates 32.5° N, 83.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mint Spring Formation, Rupelian (33.9 - 28.1 Ma)

• The Mint Spring Formation consists of fossiliferous sands that lie disconformably above the estuarine clays and sands of the Forest Hill Formation. The sands of the Mint Spring Formation are moderately clean and often show cross-bedding. These sands indicate a near-shore shelf enviroment and have a macrofauna dominated by bivalves.

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, conglomeratic, calcareous conglomerate and wackestone

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, mechanical,

• bivalves only.

Primary reference: D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5945: authorized by Linda Ivany, entered by Sarah DeLong on 03.01.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• the list uses catagories. For example: R = rare, 1-9 valves. C = common, 10- 99 valves. A = abundant, 100+ valves were collected.

•Categories are listed in the comments field, absolute abundances are given in the abundance field.

•Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant.

 Pholadida - Corbulidae
Tiza alta clam
R category
 Arcida - Glycymerididae
Glycymeris arctata Conrad 1848 clam
R category