Also known as Mound City; USGS # 32309

Where: Union County, Mississippi (34.5° N, 88.9° W: paleocoordinates 38.0° N, 66.2° W)

• small collection-level geographic resolution

When: basal Member (Chiwapa Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• No forams have been recovered from this unit, it is assigned to the Gansserina gansseri zone by Mancini et al. (1996) by sequence stratigraphy and the biostratigraphy of surrounding units. Haustator bilira assemblage zone. PJW: Nyborg et al. provide updated stratigraphy that restricts Chiwapa to Racemiguembelina fructicosa/CC25/Discoscaphites conradi zones.

• member-level stratigraphic resolution

Environment/lithology: marine; glauconitic, silty sandstone

Size class: mesofossils

Preservation: original calcite

Reposited in the USGS

Collection methods: bulk,

• Sohl collection

Primary reference: N. F. Sohl and C. F. Koch. 1987. Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf. USGS Open File Report 87-194:1-172 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 4106: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999

Creative Commons license: CC BY (attribution)