Where: New Madrid County, Missouri (36.4° N, 89.6° W: paleocoordinates 39.5° N, 69.8° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Porters Creek Formation, Paleocene (66.0 - 56.0 Ma)

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

Size class: microfossils

Preservation: original sporopollenin

Reposited in the USGS

Collection methods: core, chemical, hydrochloric, hydroflouric,

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 231962: authorized by Phillip Jardine, entered by Hannah Morck on 10.10.2023

Creative Commons license: CC BY (attribution)