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 231963: authorized by Phillip Jardine, entered by Hannah Morck on 10.10.2023
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Veryhachium hyalodermum acritarchs | |
Magnoliopsida | |
Angiospermae | |
Momipites "tenuipolus group" Wodehouse 1933
Momipites coryloides Wodehouse 1933
Momipites microfoveolatus Stanley 1965 | |
Betula infrequens birch | |
Margocolporites cribellatus legume | |
Chenopodipollis spp. Krutzsch 1966 | |
| |
Holkopollenites chemardensis | |
Holkopollenites chemardensis Stover et al. 1966 | |
Equisetopsida | |
Classopollis spp. Pflug 1953 | |
Ginkgoopsida | |
Ephedra "voluta type" Linnaeus 1753 jointfir | |
Dinophyceae | |
Achomosphaera sp. Evitt 1963 | |
Palaeocystodinium cf. australinum Lentin and Williams 1976 | |
| |
Osculapollis | |
Pseudoplicapollis | |
Pseudoplicapollis limitata Frederiksen 1978 |