USGS core 5A, sample D6711-A (Paleocene of the United States)

Where: Custer County, Montana (46.5° N, 105.7° W)

• Paleocoordinates: 54.9° N, 69.9° W (Wright 2013)

• coordinate estimated from map

When: Tongue River Member (Fort Union Formation), Paleocene (66.0 - 56.0 Ma)

• O'Dell - Cache coal bed.

•From Pocknall and Nichols 1996: Caryapollenites Assemblage Zone, Pistillipollenites mcgregorii Subzone.

Environment/lithology: terrestrial; coal

Size class: microfossils

Preservation: original sporopollenin

Collected by USGS, Denver, Colorado

Collection methods: core, chemical, hydrochloric, hydroflouric

• All slides are held in the Denver laboratory of the U.S. Geological Survey.

Primary reference: D. Pocknall. 1986. Palynological data from the Fort Union and Wasatch formations, Powder River basin, Wyoming and Montana. Open-File Report (86-117)more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 236729: authorized by Phillip Jardine, entered by Hannah Morck on 24.10.2024

Creative Commons license: CC0 (CC0)

Taxonomic list

• From Pocknall and Nichols 1996: 'Relative abundance (percentage) data were derived initially on the basis of counts of 200 specimens per sample. Dominance of assemblages from most samples by inaperturate pollen necessitated that these palynomorphs be excluded from our pollen sum in order to evaluate the abundance of the other species. Additional counts were then made until a total of 200 specimens exclusive of inaperturates had been counted for each sample. After completion of counting, slides were scanned and the presence of species not included in the count were recorded.’

•

•Abundance data have been entered here based on the initial counts (i.e. those that included the inaperturate pollen), with abundances from the additional counts included as comments for the relevant taxa. Taxa without abundance data were those recorded as present in the post-count scans.

Show authors, comments, and common names
Angiospermae
 Mesangiosperms - Arecaceae
Arecipites cf. tenuiexinous
unclassified
  -
Pistillipollenites mcgregorii, Polyatriopollenites vermontensis
Angiospermae
 Fagales - Fagaceae
Quercus explanata
unclassified
  -
"Bisaccate pollen" indet.
Magnoliopsida
  -
Ailanthipites cf. berryi
Angiospermae
 Santalales - Loranthaceae
Syncolporites cf. minimus
unclassified
  -
Ulmipollenites "krempii/tricostatus", "Tricolpate B." indet., "Taxodiaceae/Cupressaceae" indet.
Angiospermae
 Gunnerales -
Tricolpites hians
 Cornales - Nyssaceae
Nyssa ingentipollinia
unclassified
  -
"Tricolpate fine reticulum" indet.
Angiospermae
 Fagales - Juglandaceae
Momipites ventifluminis, Momipites wyomingensis, Caryapollenites imparalis, Caryapollenites veripites, Caryapollenites wodehousei
Momipites ventifluminis Nichols and Ott 1978
Momipites wyomingensis Nichols and Ott 1978
Caryapollenites imparalis Nichols and Ott 1978
Caryapollenites veripites Wilson and Webster 1946
Caryapollenites wodehousei Nichols and Ott 1978
 Fagales - Fagaceae
Cupuliferoipollenites spp.
 Fagales - Betulaceae
Alnipollenites verus
Alnipollenites verus Potonie 1931 birch
 Proteales - Proteaceae
Triporopollenites spp.
Triporopollenites spp. Pflug and Thomson 1953
Magnoliopsida
  -
"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus
"Tricolpites anguloluminosus" = Albertipollenites anguloluminosus Archangelsky 1973
Polypodiopsida
  - Polypodiaceae
Laevigatosporites spp.
Lycopodiopsida
 Lycopodiales - Lycopodiaceae
Lycopodiumsporites sp.
Lycopodiumsporites sp. Delcourt and Sprumont 1955 clubmoss
Cycadopites
  -
Cycadopites spp.
Cycadopites spp. Wodehouse 1933