PRTM #171, sample 171FU6 (Paleocene of the United States)

Where: Bowman County, North Dakota (46.0° N, 103.8° W: paleocoordinates 51.7° N, 79.6° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Fort Union Formation, Danian (66.0 - 61.6 Ma)

• Sample height relative to Fort Union and Hell Creek formation contact.

Environment/lithology: "floodplain"; silty mudstone

Size class: microfossils

Preservation: original sporopollenin

Collection methods: bulk, chemical, hydrochloric, hydroflouric

• Samples were collected in the freshly excavated stratigraphic sections. Visible cracks were avoided when sampling to prevent cross contamination between lithological units. Samples were sent to Global GeoLabs Ltd. in Canada for preparation, where standard processing allowed for reliable quantitative work and comparisons between samples. Slides were analyzed using the microscope at the Palaeobotany Department of the Muséum National d'Histoire Naturelle in Paris.

Primary reference: A. Bercovici, D. Pearson, D. Nichols and J. Wood. 2009. Biostratigraphy of selected K/T boundary sections in southwestern North Dakota, USA: toward a refinement of palynological identification criteria. Cretaceous Research 30:632-658 [P. Jardine/H. Morck]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 234627: authorized by Phillip Jardine, entered by Hannah Morck on 25.04.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Chlorophyceae
  -
Pediastrum sp. Meyen 1829
Polypodiopsida
  - Gleicheniaceae
Gleicheniidites sp. Dettmann 1963
 Salviniales - Polypodiidae
Pteridopsida
  -
Bryopsida
  -
Algae
 Algae -
Cycadopites
  -
Cycadopites spp. Wodehouse 1933
Equisetopsida
 Cupressales - Pinidae
Inaperturopollenites spp. Potonié 1966
 Anthophyta -
Penetetrapites
  -
Penetetrapites sp. Hedlund and Norris 1968
Tricolpites microreticulatus
  -
"Tricolpites microreticulatus" = Retitricolpites microreticulatus
"Tricolpites microreticulatus" = Retitricolpites microreticulatus Van der Hammen 1954
K-taxon
Angiospermae
 Malvales - Malvaceae
 Gunnerales -
Tricolpites spp. Couper 1953
 Proteales - Proteaceae
Triporopollenites spp. Pflug and Thomson 1953
 Mesangiosperms - Arecaceae
Arecipites sp. Nichols et al. 1973 palm
 Mesangiosperms - Araceae
 Coniferales -
Pinopsida
 Pinales - Pinaceae
Pityosporites spp. Seward 1914