Where: New Madrid County, Missouri (36.4° N, 89.6° W)

• Paleocoordinates: 41.9° N, 56.8° W (Wright 2013)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Porters Creek Formation, Danian (66.0 - 61.6 Ma)

• Eleven samples from the lower part of the Porters Creek Clay at 1544 to 1671 ft contain an assemblage from Zone NP3 (Danian).

Environment/lithology: marginal marine; hardground, micaceous, pyritic, gray claystone

Size class: microfossils

• Calcareous nannofossils.

Preservation: original calcite

Reposited in the USGS

Collection methods: core,

Primary reference: N. O. Frederiksen, L. M. Bybell, R. A. Christopher, A. J. Crone, L. E. Edwards, T. G. Gibson, J. E. Hazel, J. E. Repetski, D. P. Russ, C. C. Smith, and L.W. Ward. 1982. Biostratigraphy and paleoecology of lower Paleozoic, upper Cretaceous, and lower Tertiary rocks in U.S. Geological Survey New Madrid test wells, Southeastern Missouri. Tulane Studies in Geology and Paleontology 17(2):23-45 [P. Jardine/H. Morck]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 231964: authorized by Phillip Jardine, entered by Hannah Morck on 10.10.2023

Creative Commons license: CC0 (CC0)