Where: Natrona County, Wyoming (43.0° N, 107.1° W: paleocoordinates 49.0° N, 86.0° W)
• coordinate estimated from map
• hand sample-level geographic resolution
When: Fort Union Formation, Paleocene (66.0 - 56.0 Ma)
Environment/lithology: terrestrial; siliciclastic sediments
• Nichols and Ott (1978) did not provide specific lithological or environmental information for their individual samples, and they did not place them within a stratigraphic scheme. I have therefore provided the lithological overview given in the paper for the Paleocene sequence within the Wind River Basin, and given the mix of fluvial and lacustrine sediments within this I have opted for 'terrestrial indet.' as the environment.
• The lower member of the Fort Union Formation is of fluvial origin. It has a highly variable lithology of sand, silt, and shale with local ironstone and coal beds. Lithic units are laterally discontinuous with scour and fill structures evident at many places. The Waltman Shale Member, of lacustrine origin, is a brown shale with minor amounts of sand. Where present it is readily identifiable and mappable as a formational unit.
Size class: microfossils
Preservation: original sporopollenin
Collection methods: bulk,
• Nichols and Ott (1978) provided no information on collecting and processing methods.
Primary reference: D. J. Nichols and H. L. Ott. 1978. Biostratigraphy and Evolution of the Momipites-Caryapollenites Lineage in the Early Tertiary in the Wind River Basin, Wyoming. Palynology 2:93-112 [P. Jardine/P. Jardine]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 224730: authorized by Phillip Jardine, entered by Phillip Jardine on 01.04.2022
Creative Commons license: CC BY (attribution)
Taxonomic list
• Other pollen types (e.g. Aquilapollenites spinulosus, Tilia vescipites, Tilia tetraforaminipites, Pistillipollenites mcgregorii and Insulapollenites rugulatus) are mentioned as being present in the sections studied, but are not associated with any specific samples, and are therefore not included in the taxonomic lists.
Show authors, comments, and common names
| Angiospermae |
| Fagales - Juglandaceae |
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